Blaw-Knox PF-200 Manual de usuario

Drive Train Highway Class Paver/Finishers

A-1

TABLE OF CONTENTS

TASK PAGE NO.

Table of Contents ............................................................................................................... A-1

Alphabetical Index .............................................................................................................. A-2

Safety Precautions ............................................................................................................. A-3

Theory of Operation............................................................................................................ A-4

System Maintenance and Service ...................................................................................... A-7

Drive Train Troubleshooting ............................................................................................... A-8

Engine Assembly.............................................................................................................. A-14

Radiator ............................................................................................................................ A-19

Water Temperature and Oil Pressure Sending Units ....................................................... A-22

Hour Meter Switch ............................................................................................................ A-24

Air Cleaner Assembly ...................................................................................................... A-25

Exhaust Muffler................................................................................................................. A-29

Throttle Cylinder ............................................................................................................... A-31

PTO and Clutch Assembly ............................................................................................... A-33

Pump Drive Transmission ................................................................................................ A-43

Three Speed Traction Transmission Assembly (Wheeled) .............................................. A-47

Three Speed Traction Transmission Assembly (Tracked) ............................................... A-51

Traction Drive Shaft Assembly ......................................................................................... A-56

Traction Drive Motor (see Hydraulics)

Drive Axle and Brake Assembly (Wheeled)...................................................................... A-58

Electric Axle Shift Unit ...................................................................................................... A-62

Drive Wheel and Tire (Wheeled) ...................................................................................... A-64

Drive Wheel Spindle and Hub Assembly (Wheeled) ........................................................ A-68

Drive Chain and Tightener Assembly (Wheeled) ............................................................. A-72

Traction Case Assembly (Drop Box) (PF-510) ................................................................. A-75

Traction Drive Track Assembly (PF-510) ......................................................................... A-89

Track Band (PF-510) ........................................................................................................ A-95

Track Pad (PF-510) .......................................................................................................... A-99

Bogie Wheel Assembly (Wheeled) ................................................................................. A-103

Bogie Wheel Assembly (Tracked) .................................................................................. A-108

Take-Up Wheel Assembly (PF-510)............................................................................... A-113

Front Wheel Assist (see Hydraulics)

Appendix A – Vendor Component Publications Listing .......................................... Appdx–A-1

Appendix B – Fabricated Tools .............................................................................. Appdx–B-1

Highway Class Paver/Finishers Drive Train

A-2

ALPHABETICAL INDEX

WHEELED PAVERS

TASK PAGE NO.

Air Cleaner Assembly ................................................................................................................................................................................................................................. A-25

Bogie Wheel Assembly (Wheeled) ........................................................................................................................................................................................................... A-108

Brake Assembly and Drive Axle (Wheeled) ................................................................................................................................................................................................ A-58

Clutch and PTO Assembly .......................................................................................................................................................................................................................... A-33

Cylinder, Throttle......................................................................................................................................................................................................................................... A-31

Drive Axle and Brake Assembly (Wheeled) ................................................................................................................................................................................................ A-58

Drive Chain and Tightener Assembly (Wheeled) ........................................................................................................................................................................................ A-72

Drive Wheel Spindle and Hub Assembly (Wheeled) ................................................................................................................................................................................... A-68

Drive Wheel and Tire (Wheeled)................................................................................................................................................................................................................. A-64

Electric Axle Shift Unit................................................................................................................................................................................................................................. A-62

Engine Assembly ........................................................................................................................................................................................................................................ A-14

Exhaust Muffler ........................................................................................................................................................................................................................................... A-29

Front Wheel Assist (see Hydraulics)

Hour Meter Switch ...................................................................................................................................................................................................................................... A-24

Hub Assembly and Drive Wheel Spindle (Wheeled) ................................................................................................................................................................................... A-68

Motor, Traction Drive (see Hydraulics)

Muffler, Exhaust .......................................................................................................................................................................................................................................... A-29

Oil Pressure and Water Temperature Sending Units .................................................................................................................................................................................. A-22

PTO and Clutch Assembly .......................................................................................................................................................................................................................... A-33

Pump Drive Transmission ........................................................................................................................................................................................................................... A-43

Radiator ...................................................................................................................................................................................................................................................... A-19

Shaft, Traction Drive ................................................................................................................................................................................................................................... A-56

Shift Unit, Electric Axle................................................................................................................................................................................................................................ A-62

Switch, Hour Meter ..................................................................................................................................................................................................................................... A-24

Three Speed Traction Transmission Assembly (Wheeled) ......................................................................................................................................................................... A-47

Throttle Cylinder.......................................................................................................................................................................................................................................... A-31

Tightener Assembly and Drive Chain (Wheeled) ........................................................................................................................................................................................ A-72

Tire and Drive Wheel (Wheeled)................................................................................................................................................................................................................. A-64

Traction Drive Motor (see Hydraulics)

Traction Drive Shaft Assembly .................................................................................................................................................................................................................... A-56

Transmission, Pump Drive .......................................................................................................................................................................................................................... A-43

Water Temperature and Oil Pressure Sending Units .................................................................................................................................................................................. A-22

Wheel Assembly, Bogie ............................................................................................................................................................................................................................ A-103

TRACKED PAVERS

Air Cleaner Assembly ................................................................................................................................................................................................................................. A-25

Band, Track (PF-510) ................................................................................................................................................................................................................................. A-95

Bogie Wheel Assembly (Tracked)............................................................................................................................................................................................................. A-108

Case Assembly, Traction (Drop Box) (PF-510) .......................................................................................................................................................................................... A-75

Clutch and PTO Assembly .......................................................................................................................................................................................................................... A-33

Cylinder, Throttle......................................................................................................................................................................................................................................... A-31

Electric Axle Shift Unit................................................................................................................................................................................................................................. A-62

Engine Assembly ........................................................................................................................................................................................................................................ A-14

Exhaust Muffler ........................................................................................................................................................................................................................................... A-29

Hour Meter Switch ...................................................................................................................................................................................................................................... A-24

Motor, Traction Drive (see Hydraulics)

Muffler, Exhaust .......................................................................................................................................................................................................................................... A-29

Oil Pressure and Water Temperature Sending Units .................................................................................................................................................................................. A-22

Pad, Track (PF-510) ................................................................................................................................................................................................................................... A-99

PTO and Clutch Assembly .......................................................................................................................................................................................................................... A-33

Pump Drive Transmission ........................................................................................................................................................................................................................... A-43

Radiator ...................................................................................................................................................................................................................................................... A-19

Shaft, Traction Drive ................................................................................................................................................................................................................................... A-56

Shift Unit, Electric Axle................................................................................................................................................................................................................................ A-62

Switch, Hour Meter ..................................................................................................................................................................................................................................... A-24

Take-Up Wheel Assembly (PF-510) ......................................................................................................................................................................................................... A-113

Three Speed Traction Transmission Assembly .......................................................................................................................................................................................... A-51

Throttle Cylinder.......................................................................................................................................................................................................................................... A-31

Track Band (PF-510) .................................................................................................................................................................................................................................. A-95

Track Pad (PF-510) .................................................................................................................................................................................................................................... A-99

Traction Case Assembly (Drop Box) (PF-510) ........................................................................................................................................................................................... A-75

Traction Drive Motor (see Hydraulics)

Traction Drive Shaft Assembly .................................................................................................................................................................................................................... A-56

Traction Drive Track Assembly (PF-510) .................................................................................................................................................................................................... A-89

Transmission, Pump Drive .......................................................................................................................................................................................................................... A-43

Water Temperature and Oil Pressure Sending Units .................................................................................................................................................................................. A-22

Wheel Assembly, Bogie (Tracked) ............................................................................................................................................................................................................ A-108

Wheel Assembly, Take-Up (PF-510) ........................................................................................................................................................................................................ A-113

Drive Train Highway Class Paver/Finishers

A-3

SAFETY PRECAUTIONS

Read and understand the precautions listed in this

section before servicing machine. Do not attempt to

perform any servicing you do not understand or feel

you cannot perform safely.

PRECAUTIONS RELATED TO ALL MACHINES

!

WARNING

!

Parking brake line release pressure is 1800

psi (12,410 kpa, 125 bar).

!

CAUTION

Muffler is hot. Make sure muffler is cool

before attempting to remove it from the engine

or wear protective gloves.

!

CAUTION

Radiator contents under pressure. Remove

cap slowly to relieve pressure within the

system.

CAUTION

Be careful not to pinch any fuel or oil lines

when installing engine.

CAUTION

All disconnected hydraulic inlets and outlets

must be capped and plugged to prevent

contamination.

CAUTION

Do not shift transmission directly from LO to HI

or HI to LO without stopping at INT momen-

tarily.

PRECAUTIONS RELATED TO WHEELED MACHINES

!

WARNING

!

If you, your employees or agents do intend to

change, demount or mount a tire, ask a tire

service store for complete instructions. Not

following correct procedures could result in

faulty positioning of the tire and/or rim parts,

causing serious physical injury or death.

!

WARNING

!

Do not adjust traction drive chains when

engine is operating. Injury could result if

machine moves.

!

CAUTION

When bleeding brakes, loosen bleeder plug

approximately one-half to three-quarters turn

or until oil just starts to flow. If plug is loos-

ened too far, it may be blown out under

pressure and cause personal injury.

CAUTION

Brake fluid is corrosive. Be sure that brake

fluid is drained into a proper container and not

allowed to run down the side of the machine.

PRECAUTIONS RELATED TO TRACKED MACHINES

!

WARNING

!

It is desirable to have the machine operational

during track replacement. Since the battery is

NOT disconnected, you MUST tag the controls

to prevent accidental start-up.

!

WARNING

!

When feeding track over sprocket, do not get

clothing or any body parts caught between

track and sprocket.

!

WARNING

!

Do not cut or burn urethane bogie assembly or

track bands. Noxious fumes are harmful if

inhaled.

Highway Class Paver/Finishers Drive Train

A-4

THEORY OF OPERATION

DRIVE TRAIN POWER FLOW

PF-200

This highway class paver/finisher is powered by either

a Cummins or a John Deere 6-cylinder diesel engine

(1)*. Power is delivered through a PTO clutch (2)* and

short coupled drive shaft (3)* to a pump drive box (4).

Traction drive power is hydrostatically transmitted from

the variable displacement traction drive pump (5)* to

the fixed displacement, traction drive motor (6)*. All

early PF-200's (before ser. 20013-01) have (EDC)

electric displacement control of the traction drive pump

from the operator's consoles. Beginning with the PF-

200B's, (beg. ser. 20013-01) the traction pump dis-

placement is mechanically controlled (MDC) through

linkage from the operator's consoles. The traction

motor drives an electric/hydraulic shifted 3-speed

transmission (7)* for speed reduction and selection.

From the transmission, mechanical power is transferred

by another short coupled drive shaft (8)* to the electri-

cally shifted, 2-speed, drive axle (9)*. Roller type

traction drive chains transfer power from each end of

the axle to the two drive wheels (10).

Auger-conveyor drive power is hydrostatically transmit-

ted from the electrically controlled, variable displace-

ment L.H. and R.H. auger-conveyor drive pumps (11)*

(some early model PF-200 pavers may have ON/OFF

pumps) to separate conveyor drive (12)* and auger

drive (13)* L.H. and R.H. motors. The auger function of

each feed system is driven by a single speed motor.

The conveyor speed on either or both sides, can be

changed from HI to LO speed in relation to the respec-

tive auger. The auger motors are fixed displacement

and the conveyor motors are dual displacement for HI-

LOW operation. Mechanical power from the L.H. and

R.H. conveyor motor/planetaries is transferred through

the auger-conveyor drive chain case (14) to the respec-

tive conveyors (15). Mechanical power from the L.H.

and R.H. auger motors/planetaries is transferred

through the chain case to the respective augers (16).

Optional Front Wheel Assist power is hydrostatically

transmitted from the FWA Pump (5A) to the FWA Motor

(6A). ON-OFF function of FWA is controlled by a

separate elect./hyd. bypass valve.

* Specific model numbers of vendor supplied compo-

nents for various series of machines are covered in

the vendors list in the appendix.

1.

2.

3.

4.

5.

5A.

6.

1

25A

34

5

6A

6

7

8

9

10

11 12

17

13

14

Engine

PTO Clutch

Drive Shaft

Pump Drive Box

Traction Drive Pump

Front Wheel Assist Pump

(Optional)

Traction Drive Motor

Conveyor Drive Motors

Auger Drive Motors

Auger/Conveyor Chain Case

Conveyors

Augers

General Purpose Pump (Moves to

outside if opt. FWA is installed.)

12.

13.

14.

15.

16.

17.

BK-14

15

16

11

6A.

7.

8.

9.

10.

11.

Front Wheel Assist Motor

(Optional)

3-Speed Transmission

Drive Shaft

2-Speed Drive Axle

Drive Wheels

Auger/Conveyor Pumps

Drive Train Highway Class Paver/Finishers

A-5

shaft (8)* to the electrically shifted, 2-speed, drive axle

(9)*. Roller type traction drive chains transfer power

from each end of the axle to the two drive wheels (10).

Auger/conveyor drive power is hydrostatically trans-

mitted from the electrically controlled, variable displace-

ment, L.H. and R.H. auger/conveyor drive pumps (11)*

(some early model PF-172 pavers may have ON/OFF

pumps) to independent L.H. and R.H. auger/conveyor

drive motors (12). Mechanical power from the L.H. and

R.H. auger/conveyor drive motors/planetaries is

transferred through the chain cases (13) to the respec-

tive conveyors and augers (15).

Optional Front Wheel Assist power is hydrostatically

transmitted from the FWA Pump (5A) to the FWA Motor

(6A). ON-OFF function of FWA is controlled by a

separate elect./hyd. bypass valve.

* Specific model numbers of vendor supplied compo-

nents for various series of machines are covered in

the vendors list in the appendix.

PF-171 & PF-172

The PF-171 highway class paver/finisher is powered by

a Cummins 4-cylinder diesel engine (1)*. The PF-172

highway class paver/finisher is powered by either a

Cummins or a John Deere 4-cylinder diesel engine (1)*.

Power is delivered through a PTO clutch (2)* and short

coupled drive shaft (3)* to a pump drive box (4).

Traction drive power is hydrostatically transmitted from

the variable displacement, traction drive pump (5)* to

the fixed displacement, traction drive motor (6)*. All

early PF-171's (before ser. 17111-01) & PF-172's

(before ser. 17209-01) have (EDC) electric displace-

ment control of the traction drive pump from the

operator's consoles. Beginning with the PF-171A's

(beg. ser. 17111-01) & PF-172B's, (beg. ser. 17209-01)

the traction pump displacement is mechanically con-

trolled (MDC) through linkage from the operator's

consoles. The traction motor drives an electric/hydraulic

shifted 3-speed transmission (7)* for speed reduction

and selection. From the transmission, mechanical

power is transferred by another short coupled drive

12

13

BK-15

12

15

19

10 8

6

7

25A

11

35416

14

1.

2.

3.

4.

5.

5A.

6.

6A.

7.

8.

Engine

PTO Clutch

Drive Shaft

Pump Drive Box

Traction Drive Pump

Front Wheel Assist Pump (Optional)

Traction Drive Motor

Front Wheel Assist Motor (Optional)

3-Speed Transmission

Drive Shaft

2-Speed Drive Axle

Drive Wheels

Auger/Conveyor Pumps

Auger/Conveyor Drive Motors

Auger/Conveyor Chain Case

Conveyors

Augers

General Purpose Pump (Moves to

outside if opt. FWA is installed.)

9.

10.

11.

12.

13.

14.

15.

16.

6A

Highway Class Paver/Finishers Drive Train

A-6

PF-510

The highway class paver/finisher is powered by either a

Cummins or a John Deere 6-cylinder diesel engine (1)*.

Power is delivered through a PTO clutch (2)* and short

coupled drive shaft (3)* to a pump drive box (4).

Traction drive power is hydrostatically transmitted from

the variable displacement L.H. and R.H. traction drive

pumps (5)* to the L.H. and R.H. traction drive motors

(6)*. All PF-510's have independent L.H. and R.H.

(MDC) mechanical displacement control of respective

traction drive pumps through linkage from the operator's

consoles. These motors are each mounted on electric/

hydraulic shifted 3-speed transmissions (7)* for speed

reduction and selection. From the transmissions,

mechanical power is transferred by universal joints (8)*

to a reduction transmission drop box (9) on each side of

the machine. A track drive sprocket on the output shaft

of each drop box drives the track (10).

The track systems are kept properly tensioned auto-

matically by track tension cylinders (11)* forcing the

front take-up wheel assemblies (12) forward. The

general purpose pump (13)* provides 1800 psi pressure

through a manifold and check valve assembly to the

track tension cylinders on each side of the machine.

This pressure keeps the cylinder extended and the

track systems tight by pushing the front take-up wheel

forward whenever the engine is running. Cylinder

pressure is maintained by the check valve when the

engine is off. During operation, if slack is required in

either track when going over large obstructions or

passing solid materials through the drive sprocket and

bogies, the track tension cylinder retracts. As pressure

on the cylinder increases from an obstruction, a hydrau-

lic relief valve will bypass hydraulic pressure to the

cylinder at 3500 psi (24,129 kpa, 241 bar). When the

obstruction has cleared, the relief valve will reset,

retensioning the track.

Auger/conveyor drive power is hydrostatically trans-

mitted from the electrically controlled, variable displace-

ment, L.H. and R.H. auger/conveyor drive pumps (14)*

to independent L.H. and R.H. auger/conveyor drive

motors (15)*. Mechanical power from the L.H. and R.H.

auger/conveyor motors planetaries is independently

transferred through the auger/conveyor drive chain

case (16) to the respective conveyors (17) and augers

(18).

* Specific model numbers of vendor supplied compo-

nents for various series of machines are covered in

the vendors list in the appendix.

15

16

BK-16

15

9

10

9

13

10

12 11

17

678 18

1

2

3

4

18

876

514 14

1.

2.

3.

4.

5.

6.

7.

8.

9.

Engine

PTO Clutch

Drive Shaft

Pump Drive Box

Traction Drive Pump

Traction Drive Motor

3-Speed Transmission

Drive Shaft

Reduction Transmission Drop Box

10.

11.

12.

13.

14.

15.

16.

17.

18.

Drive Track

Track Tension Cylinder

Front Tack-Up Wheel

General Purpose Pump

Auger/Conveyor Pumps

Auger/Conveyor Drive Motors

Auger/Conveyor Chain Case

Conveyors

Augers

5

Drive Train Highway Class Paver/Finishers

A-7

COMPONENT INTERVAL

Hydraulic fluid (check level) Daily

Engine oil (check level) Daily

Engine air filter (check) Every 240 hours

Short coupled drive shafts Every 240 hours

(grease)

Engine oil and filter Every 240 hours

(change both)

Front wheel king pins Weekly

(grease) (Wheeled Machines)

Drive wheel spindles Weekly

(grease) (Wheeled Machines)

Parking brake (grease) Quarterly

Hydraulic fluid Yearly

Hydraulic filters Yearly

(Change filters after first 50 Yearly

hours)

Front wheels (repack with Yearly

grease) Wheeled Machines)

Pump drive box (change Yearly

fluid)

Transmission (change fluid) Yearly

Engine fuel filter (change) Yearly

Engine PTO and clutch Yearly

(grease)

Differential in axle (change Yearly

fluid)

Bogie pivot bearings Weekly

(grease) (PF-510 only)

Traction cases (change fluid) Yearly

(PF-510 only)

Note: Specifications and fluid capacities for each

model are covered in the front section of this manual.

Refer to Section C in each models Operator's Manual

for routine Service Procedures and locations on the

machine.

• Inspect the engine compartment: Pay particular

attention to fuel and cooling system components,

starter, alternator, oil system, electrical wiring and

engine mounts.

• Inspect all breathers (on transmissions and

planetaries) for clogging.

After inspection, it is important to perform basic preven-

tive maintenance as shop policy. Completely lubricating

the machine, and, checking and refilling battery, engine

oil, hydraulic and cooling system levels is recom-

mended as a minimum.

SYSTEM MAINTENANCE AND

SERVICE

The drive train is one of the most important systems of

the machine. To ensure machine availability, preven-

tive maintenance must be performed before work

begins. Preventive maintenance begins with inspection.

Systematic inspection may reveal damage that, if not

corrected, may result in serious damage or failure. Any

problems revealed during pre-service inspection must

be reported to the shop foreman or service manager.

The following is a list of inspection criteria that should

be performed whenever the machine is serviced.

• Keep it clean: Dirt, grease, oil and debris only get in

the way and may cover up a serious problem.

Clean as you work and as needed. Use cleaning

solvent to clean metal surfaces and soap and water

to clean rubber or plastic material.

• Bolts, nuts and screws: Check that they are not

loose, missing, bent or broken. Look for chipped

paint, bare metal or rust around bolt heads. Tighten

any that are loose and torque to specification.

• Traction drive chains: Keep chains properly ad-

justed. Properly adjusted chains will produce

maximum service life.

• Welds: Look for loose or chipped paint, rust, or

gaps where parts are welded together. If you find a

bad weld, report it to your supervisor immediately.

• Electric wires and connectors: Look for cracked or

broken insulation, bare wires and loose or broken

connectors. Tighten loose connections and make

sure wires are in good condition.

• Hoses and fluid lines: Look for wear, damage and

leaks. Make sure clamps and fittings are tight. Wet

spots show leaks, of course, but a stain around a

fitting or connector can also mean a leak. If a leak

comes from a loose fitting or connector, tighten it. If

something is broken or worn out, either correct it or

report it to your supervisor. Tighten all hoses and

fittings before putting machine in service.

Highway Class Paver/Finishers Drive Train

A-8

Before taking any action to correct a possible malfunc-

tion, follow these rules:

• Question the operator if possible to obtain any

information that might help determine the cause of

the problem.

• Never overlook the chance that a problem could be

of simple origin. The problem could be corrected

with minor adjustments.

• Use all senses to observe and locate troubles.

• Use test instruments or gauges to help you deter-

mine the isolate problems.

• Always isolate the system where the malfunction

occurs and then locate the defective component.

DRIVE TRAIN

TROUBLESHOOTING

The troubleshooting guides in this section list the

common malfunctions which may be found during the

operation or maintenance of the machine. You should

perform the test/inspections and corrective actions in

the sequence listed.

This manual cannot list all malfunctions that may occur,

nor all tests or inspection and corrective actions. If a

malfunction is not listed or it is not corrected by the

listed corrective actions, notify your supervisor.

Each malfunction symptom is followed by yes/no

step(s) that should be taken to determine the cause and

the corrective action that must be taken to remedy the

problem.

Drive Train Highway Class Paver/Finishers

A-9

DRIVE TRAIN TROUBLESHOOTING (CONTINUED)

ENGINE WILL NOT CRANK

(All main switches ON)

Problem Solution

1. Traction levers not in neutral Check control levers must both be in

neutral/Reposition.

2. Left-Right Switch (on center console) Check operating position/Reposition.

3. Low or dead battery Check voltage at terminals/Charge or replace.

Check electrolyte level/Fill & charge.

4. Poor battery connections Check terminal connections/Clean & tighten.

5. Poor engine ground Check ground cable/Clean & tighten.

6. Poor starter motor connections Check starter connections/Clean & tighten.

7. Open electrical circuit Check for wire off of any terminal in circuit/Reconnect.

8. Faulty "neutral start" limit switches Check position, voltage & continuity/Reposition

(on traction pump or inside of op. consoles) switch(es) (see number 1) or replace.

9. Faulty starter motor solenoid Check voltage & function/Replace.

10. Faulty "starter" relays (on starter) Check voltage & continuity/Replace.

(inside of center consoles)

11. Faulty "main" power relay (inside of center console) Check voltage & continuity/Replace.

12. Faulty "motion" relay (inside of center console) Check voltage & continuity/Replace.

13. Faulty governor switch (on center console) Check position, voltage & continuity/Change position

or replace.

Highway Class Paver/Finishers Drive Train

A-10

DRIVE TRAIN TROUBLESHOOTING (CONTINUED)

ENGINE CRANKS BUT WILL NOT START

(All main switches ON)

Problem Solution

1. No fuel in tank Check tank/Fill.

2. No fuel to engine Check voltage at engine injection pump.

Check fuel filter(s)/Replace.

Check fuel lines to engine/Clean.

Check fuel pump voltage & function/

Repair or replace.

Check injectors & injection fuel lines/

Clean.

3. Contaminated fuel in tank Check tank/Drain & refill.

4. Incorrect fuel in tank Check tank/Drain & refill.

5. Slow cranking engine Cold weather/Release clutch.

Check battery voltage/Charge or replace.

Check battery electrolyte level/

Fill & charge.

Check battery terminals/Clean & tighten.

6. Other engine problems * See Engine Manual.

* See John Deere Engine Operator's Manual, OMRG18293, pages 68-76.

* See Cummins Engine Operator's Manual, 3810205, page T1-T33.

Note: The above manuals cover additional less likely problems.

Blaw-Knox PF-200 Manual de usuario

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