Trelawny MHS 5 Guía de solución de problemas

MHS 5

MULTI-HEADED SCABBLER

OPERATION & MAINTENANCE

OPERATION

General Information

Thank you for your purchase of the

MHS 5 Multi-headed Scabbler.

Before operating the Scabbler, this

m a nu a l m u st b e r e ad a n d

understood by the operator, if in any

doubt ask your supervisor before

using this equipment. Failure to

follow these instructions could result

in damage to the Scabbler and/or

personal injury.

Trelawny SPT Ltd disclaims all

responsibility for damage to persons

or objects arising as a consequence

of incorrect handling of the tool,

failure to inspect the tool prior to

starting work for damage or other

faults that may influence the

operation or safe working of the tool,

or failure to follow the safety

regulations or applicable to the job

site.

The tool is primarily designed for

concrete reduction, and can be used

for the removal of laitance from

concrete floors, but may also be

used for the removal of heavy paint

or epoxy floor coatings, it can be

used both indoors and out.

Note:

Operators should be familiar with the

data given in the specification

section.

Please keep these instructions in a

safe and accessible place.

This tool must not be used in

potentially explosive atmospheres.

Where a vacuum shroud assembly is

supplied separately, see the

instructions under “Servicing” for

fitting.

ASSEMBLY

Remove 4 x M8 and the 1 x 6mm

screws from the upper handle.

Insert the top handle into the

lower handle and secure with the

4 x M8 Screws.

Attach the hose clip to the upper

handle with the 1 x M6 screw.

Do not over tighten.

Recommended

lubricants

Oil the tool daily before use. Put a

liberal quantity of one of the

following air tool lubricants through

the air inlet.

SHELL Naturelle HF

CASTROL Carelube HTG 22

Cleaning

At intervals of no more than 100

hours use, or if operation becomes

unproductive, or if any of the pistons

shows signs of sticking, dismantle

and clean with highly refined

pa raffin. Replace a ny worn

components as necessary.

I m m e d i a t e l y a f t e r c l e a n i n g ,

thoroughly oil the tool with one of the

recommended lubricants.

Risk of Hand-arm

Vibration injury

These tools may cause Hand-arm

Vibration Syndrome injury if their use

is not adequately managed. We

advise you to carry out a risk

assessment and to implement

measures such as; limiting exposure

time [i.e. actual trigger time, not total

time at work], job rotation, ensuring

the tools are used correctly, ensuring

the tools are maintained according to

our recommendations, and ensuring

that the operators wear personal

p r o t e c t i v e e q u i p m e n t [ P P E ]

particularly gloves and clothing to

keep them warm and dry.

Employers should consider setting

up a progr amme of h ea lth

surv eill a nce to establ ish a

benchmark for each operator and to

detect any early symptoms of

vibration injury.

We are not aware of any PPE that

provides protection against vibration

injury by attenuating vibration

emissions.

See „Specifications‟ section for

vibration emission data.

Further advice is available from our

Technical Department.

ALWAYS DISCONNECT

THE TOOL FROM THE AIR

SUPPLY BEFORE

CARRYING OUT ANY

SERVICING OR

MAINTENANCE

OPERATIONS.

Manual Handling

T h e c o m p l e t e t o o l w e i g h s

approximately 114kg (251.5lbs).

Where possible use a hoist with

correctly rated lifting equipment to

connect to the supplied lifting

eyebolt, which is fitted on the top of

the MHS5 Scabbler.

Ensure that the eyebolt is screwed

down to its shoulder and has been

tightened using a bar no longer than

150mm (6.00”).

Do not use the handle as a lifting

point during any lifting operation.

Always apply local health and safety

regulations with regard to manual

handling.

Safety Precautions

Do wear Personal Protective

Equipment including safety goggles,

footwear, ear defenders and gloves.

In some environments it will be

necessary to wear facemasks or

breathing apparatus.

Do be aware that this tool is not

electrically insulated.

Do ensure that this tool is lubricated

daily.

Do be aware that this tool can create

dust and flying debris.

Do be aware of others working

around you.

Do keep hands and clothing away

from moving parts.

Always observe safe working

practices and local safety

regulations at all times.

Do not allow the tool to run

unattended.

Do not use this tool to prepare walls.

Do not allow the tool to run

continuously whilst not in contact

with the surface being prepared.

Do not modify this tool in any way,

as this will invalidate the warranty

and could lead to serious injury.

Do not use this tool in potentially

explosive environments.

Do not drag this tool by the air hose.

Do not use petrol (gasoline),

thinners or any other high flash point

solvent to clean the tool.

Please note: Unrestrained hoses

can whip if they become detached.

Ensure that the work place is well

ventilated. Avoid operating engine-

powered com pressors in an

enclosed area, since engine exhaust

gases are poisonous.

SERVICING

Safe use of this tool requires a solid

stance and secure foothold; the

operator must adopt a firm and

stable position at all times. To

operate the tool pull the lever on the

handle bar and immediately start to

move the tool back and forth.

Keeping the lever depressed,

continue until the desired finish is

achieved. Never run the tool

continuously in the same place, as

the cutterheads will dig into the

surface.

To switch off,

Simply release the lever on the

handle whilst continuing to move the

tool back and forth. Complete a

small area noting the performance;

stop the tool, inspect the finish

produced. Handled correctly the

MHS 5 Multi-headed Scabbler will

work quickly and efficiently.

Gloves and personal protective

equipment must be worn when

using this tool. The tool will ride

irregularities of up to 13mm (1/2”).

Anything greater will risk cutterhead

damage.

Care must be taken to avoid

damaging or tripping over the air

hose.

Servicing

Only a competent person, in a

suitably equipped workshop, must

carry out maintenance.

Always disconnect the tool from

the air supply before carrying out

any of the following operations.

Dismantling

After ensuring that the air supply is

turned off, remove the tool from the

airline. Thoroughly clean the outside

of the tool prior to dismantling.

Scabbler Head Removal

Remove the eyebolt (7) from the

block (1). Take extreme care against

trapping your fingers when lifting or

turning the tool over, Using the

handle, pull the tool over until it

rests on the handle bars and the

cylinder block top face; remove the

supplied punch (33) from the left

hand side handle bar by removing

the “blanking cap” part of the punch

with a small screw driver.

Follow next section if vacuum shroud

is fitted, then continue with:-

Using a medium hammer and the

supplied punch knock out the spiral

roll pin (14) from each cutterhead

(10).

Remove the cutterhead from the

piston, in some extreme cases it

may be necessary to warm the

cutterhead to ease removal from the

piston, especially if they have been

in situ for some time.

Exhaust Chamber & Vacuum

shroud removal

Remove the plastic caps protecting

the caphead bolts, unscrew the 5 x

bolts using a short extension and

8mm Allen key socket.

Remove the vacuum shroud (3) if

fitted and the exhaust chamber (2)

and clean out any dust that may

have accumulated inside the

chamber.

It is wise to replace the cylinder dust

seals (4) which are situated in

recesses in the exhaust chamber

and also replace if fitted, the rear

vacuum shroud seal (5) at this point

also.

Piston and Cylinder removal

Start with unscrewing the two outer

of the front three cylinders (9) using

a 54mm or 1 1/4” Witworth spanner,

followed by one of the back row and

then the centre front.

The cylinders are retained using a

thread locking adhesive and may

require a sharp blow on the spanner

to break the bond.

Once the cylinders have been

removed from the block (1), remove

the piston (8) from its cylinder.

Remove the wiper seal (13) from is

recess using a small screw driver

and remove both of the cylinders

O‟Rings (12) & (11). Inspect both the

piston and cylinder for any sign of

wear or grooving paying particular

attention to the small bore of the

cylinder. Replace the piston,

pushing it to the bottom of the

cylinder bore, if there is excessive

play between the piston and

cylinder, the cylinder and possibly

the piston will require replacing.

Pre-Start Check

The compressed air supply must be

free from water and dirt. The

installation of a filter/regulator/

lubricator air preparation set (with

moisture trap) adjacent to the tool is

strongly recommended. Always

clear the air hose before connection

to the tool. Ensure that no moisture

(condensation) is present in the air

hose. Ensure that a minimum 19mm

(3/4”) bore air hose is used and that

all couplings are secure; leak free

and in good condition. Limit the

length of air hose to 15M (50ft).

Where extra length is necessary, for

each additional 15M (50ft) of air

hose used, the pressure drop is

approximately 0.16bar (3psi).

Correct operating pressure is

6.2bar (90 psi).

Do not let the operating pressure fall

below 5.5bar (80p.s.i.) or rise above

6.9bar (100 psi) absolute maximum.

Preferably, the compressor should

be able to supply a minimum of

57L/s (120cfm) of free air.

Some compressor manufactures

give a displaced air figure which

generally produces a much lower air

output.

In particularly cold weather it is

recommended that a proprietary anti

-freeze lubricating oil be used.

Starting Work

Prior to operating the tool check: -

That all fittings are secure, free from

leaks and air hoses are in good

condition.

That all parts of the tool are fully

screwed together and secure, if

in any doubt ask your supervisor

before using this equipment.

That a liberal amount of lubricant

has been put into the air inlet of

the tool. (See recommended

lubricants)

Adjust the handle bar to a

comfortable working height for the

operator by slackening off the 4 x M8

caphead bolts on the handle bar

caps, and the single M8 caphead

bolt on the handle bar side quadrant.

Note that the handle bar will be

slightly lower when the tool is in use.

Adjust and retighten all bolts.

and (42). Using a 6mm punch,

drive out the throttle lever pivot pin

and withdraw the throttle lever (36).

ASSEMBLY

Assembly is generally the reverse of

dismantling. Before any assembly

takes place, ensure all internal parts

are clean and have a film of air tool

oil lubrication unless otherwise state.

Avoid lubricating oil or grease

contaminating the threads of the

cylinder (9) and the corresponding

t h r e a d s i n t h e b l o c k ( 1 ) .

These will require securing with a

t h r e a d - l o c k i n g a d h e s i v e .

Replace any parts that show signs of

wear. If the tool is being fully

serviced it is recommended to

change the 8 x vibro-mount vibration

reducing bushes (28), the

8 x Isolastic bushes (16) and all of

the O‟Rings (4), (11), (12), (34), (41)

and (42). It is also good practice to

replace the M10 nyloc nuts during

assembly.

Valve Body Removal/Servicing

Apply general-purpose bearing

grease to the valve stem 39). Insert

valve stem with its O'Rings (41) and

(42) into the valve guide hole in the

valve body, followed by the spring

(40). Screw in the valve cap (38) by

hand and using a 30mm spanner

fully tighten. Using a 6mm punch

align the hole in the valve body (35)

with the holes in the throttle lever

(36). Using a small hammer fit the

throttle lever pin (7).

Piston and Cylinder Assembly.

Fit new wiper seals (13) and new

O'Rings (11) and (12) to the

appropriate small and large grooves

on the cylinders (9).

Insert a piston (8) into each cylinder,

ensure that the piston moves freely

and does not stick or is tight at any

point in the bore.

Fit the scabbler head (10 until it butts

up against the front face of the

piston (8).

Align the holes in the piston (8) with

the Scabbler head (10). The shank

of a new 12.5mm drill bit or

7/16

”

Allen Key is a good fit for this

purpose or use a suitable piece of

dowelling.

Support the scabbler head on a

stable surface. Holding the spiral pin

(14) with a pair of pliers to avoid

hitting the fingers. Using a medium

size hammer, drive in the spiral pin

until central in the scabbler head

(10).

Ensure that the threads of the

cylinder and body (18) are clean and

free of oil; apply a bead of Loctite

243 or similar to the first few threads

of the cylinder.

P u t a l i b e r a l a m o u n t o f

recommended lubricating oil on top

of each piston.

The sequence of replacing the

cylinders are:-

Starting with the central front

cylinder. Screw in the cylinder by

hand and complete the procedure on

each cylinder assembly one at a

time, tighten to a recommended

torque of 135Nm (100 lbs/ft) using a

suitable crowfoot wrench on the

spanner flats. Followed by the back

cylinders, and finally the two outer

front cylinders.

Assembly of Exhaust Chamber

/Vacuum Shroud

Place the block (1) on to its top face.

Check that the cylinder seals (4)

have been fitted into the recesses in

the exhaust chamber and that all the

cutterhead retaining pins (14) are

central, otherwise the exhaust

chamber seals could become

damaged.

Apply a small amount of grease

around the outside of all the

cylinders to help the seals (4) slide

over. Lower the exhaust chamber (2)

into position with the exhaust

chambers cavity nearest the block.

Apply a bead of Loctite 243 or

similar to the first few threads. Insert

the 5 x 10mm caphead bolts

through the vacuum shroud and/or

exhaust chamber and into cylinder

block (1), with a 8mm Allen socket.

Tighten to 80 Nm (60lb/ft.)

Sub-frame to Cylinder Block

Fit new Isolastic anti-vibration

bushes (16) into the block (1) and

tighten by hand. Align the mounting

holes in the sub-frame (20) with the

holes in the block.

Secure using 8 x M10 Nyloc nuts.

Tighten down to a torque of 54Nm

(40lbs/ft)

SERVICING continued

Removing Sub-Frame from

Cylinder Block

With the tool in an upright position,

disconnect the air hose (48) from the

adaptor 15) at the cylinder block.

Unscrew the M6 bolt retaining the

hose clip 31) on the side of the main

handle (21/22). Unscrew the 4 x M8

retaining bolts from the mid section

of the main handle using a 13mm

spanner.

Using the remaining section of

handle (21) pull the tool onto its front

face.

Check that both wheels (25) spin

freely and that the bearings feel

smooth and that there is no

excessive play. If they show signs of

excessive play or if the tyre tread is

badly worn replace by knocking out

the spiral retaining pins with a pin

punch to remove the wheels.

Removal of Handle from Sub-

Frame

Unscrew the 4 x 10mm bolts using

two 17mm (11/16”AF) spanners.

Check that the vibration reducing

vibro-mount bushes (28) are in good

condition, replace if there are signs

of deterioration either from the vibro-

mount bushes from cracking or

perishing.

Only use Trelawny manufactured

vibro-mount bushes, otherwise an

increase in the vibration emission

may occur.

Remove the 8 x M10 Nyloc nuts

securing the sub-frame to the

Isolastic bushes using a 17mm

spanner.

Valve Body Removal/Servicing

Remove the valve body (35) from

the handle (23) if required.

Disconnect the air hose (48) from

the valve body and unscrew the

v a l v e b o d y f r o m t h e

T-connector (46).

If removed, secure the valve body

assembly in a vice, holding on the

main body.

Using a 30mm spanner unscrew the

valve cap (38) from the valve body,

remove the spring (40) and retrieve

the valve stem (39) with its O‟Rings

Trouble Shooting

SERVICING continued

FAULT CAUSE ACTION

Tool bounces in use Air pressure to high. Ensure that the air pressure is set at 90psi. (6.2bar).

Tool performance

slow

Worn Cutter Heads Replace Cutter Heads (Cutter Head life is approximately 100hrs)

Tool drags on floor Insufficient air supply Ensure that the compressor can supply at least 57L/s (100cfm) of free

air at 90psi in order to avoid air supply problems. See also Pre-Start

Check section

Hose bore too small Ensure that the hose bore is 3/4” (19mm).

Hose run too long Each 50 ft. (15 mtrs) of airline used, may drop the pressure by a 3psi.

Worn Pistons and/or

cylinders.

Replace piston and cylinders

If problem has not been cured by any of the above actions, contact your local dealership or agent for assistance.

Long period storage: over

3months

Clean outside of tool, inspect the

scabbler heads for wear; replace any

worn parts as required.

Remove any build up of material

from the cutter head area.

Insert a liberal quantity of air tool oil

through the air inlet and briefly run to

ensure that internal components are

coated with oil. Lubricate the

exposed part of the piston and

cylinder. (See reco mm ended

lubricants)

Cover the tool to protect it.

Store the tool in a dry place.

After 6 months have elapsed, check

the condition of the hose then insert

a liberal quantity of air tool oil into

the air inlet as previously described

and briefly run to ensure that internal

components are coated with oil.

Prior to using the tool again check

the condition of the hose (48) and

the isolastic mountings (16) and the

vibro-mountings (28) for signs of

perishing etc, replace if suspect.

When next used, continue as per

“Pre-Start Check” section.

Disposal

Dismantle into component form for

disposal according to material

composition and dispose of using

waste recycling processes specified

by local regulations.

Note: Flammable material such as

plastic, rubber or composite

materials must not be incinerated but

should be disposed of using normal

industrial waste disposal processes.

Wheel to Sub-Frame

Grease the wheel bearings with a

general purpose bearing grease. Fit

a wheel spacer (26) on to the axle

spindle, followed by a wheel (25)

and a second wheel spacer, and

secure with a spiral pin (14). Repeat

for the other wheel.

Handle to Sub-Frame

Prior to refitting the lower handle

(21) to the sub-frame check the vibro

-mountings (28) for any signs of

deterioration, replace all of the

mountings if one shows signs of

deterioration.

Tool Storage

Short period storage: up to

3months.

Clean the outside of the tool and

inspect the cutter heads for wear,

replace any worn parts as required.

Remove any build up of material

from the cutter head area.

Insert a liberal quantity of air tool oil

through the air inlet and run briefly to

ensure that internal components are

coated with oil. (See recommended

lubricants)

Cover the tool to protect it.

Store the tool in a dry place.

Consumables

5 731.5059 Rear Vacuum Shroud Seal

10 426.5359 TCT Bush Cutterhead

14 813.1050 Roll Pin

SERVICING continued

Exploded View 1

SEE PAGE (10) FOR LIST OF ALL COMPONENTS

SERVICING continued

Exploded View 2

Item No Part No Description

1 611.5050 Block

2 654.5050 Exhaust Chamber

3 652.5050 Vacuum Shroud

4 726.5050 Exhaust Chamber Seal

5 731.5059 Vacuum Shroud Seal

6 818.0750 3/4” Blanking Plug (Block)

7 831.4120 Eye Bolt

8 612.5005 Piston

9 613.5001 Cylinder (O‟Ring grooves used for item 11 & 12 were removed after 2012)

10 426.5359 TCT Cutterhead (Bush) five point

426.5369 TCT Cutterhead (Bush) nine point

11 809.6599 O‟Ring Cylinder (Small) (No longer used after 2012)

12 809.6619 O‟Ring Cylinder (Large) (No longer used after 2012)

13 829.5001 Wiper Seal

14 813.1050 Roll Pin (Cutterhead Retaining)

15 826.5004 3/4” Adapter (Block & Valve body)

16 830.5050 Isolastic Bushes (Block to Sub-frame)

17-19 Not assigned

20 440.5050 Sub-Frame

21 422.5050 Lower Handle

22 422.5055 Top Handle

23 422.5060 Handle Bar

24 422.5065 Handle Bar Clamp

25 833.5050 Wheel

26 655.5050 Wheel Spacer

27 813.0645 Roll Pin (Wheel Retaining)

28 830.1000 Vibro-mount bushes (Sub-frame to Lower Handle)

29 620.5050 Insert (Vibro-mount bushes)

30 617.5050 Washer (Vibro-mount bushes)

31 815.5050 P-Clip (Hose Retaining)

32 822.2000 Rubber Grip

33 633.5050 Pin Punch

34 809.6165 O‟Ring (Punch)

35 422.5005 Valve Body

36 649.5011 Lever

37 665.5011 Lever Guard

38 634.5011 Valve Cap

39 618.5025 Valve Stem

40 712.5001 Valve Spring

41 809.5599 O‟Ring (Valve Seat)

42 809.0069 O‟Ring (Valve Stem)

43 813.0636 Roll Pin (Lever)

44 625.5011 Locknut

45 843.0765 Claw Coupling

46 819.2380 T - Connector

47 342.HY13 90oElbow Connector

48 719.5050 Armoured Hose

831.0620 M6 x 20 Hexagon Head Screw (Vacuum Skirt)

831.0616 M6 x 16 Hexagon Head Screw (Hose Clip)

824.0600 M6 Nyloc Nut

812.2060 M6 Large Washer (Vacuum Skirt)

852.0812 M8 x Button Head Screw (Lever Guard)

831.0825 M8 x 25 Hexagon Headed Screw (Lower /Upper Handle)

806.0830 M8 x 30 Caphead Bolt (Handle bar clamp/Quadrant)

806.1040 M10 x 40 Caphead Bolt

831.1080 M10 x 80 Caphead Bolt

824.1000 M10 Nyloc Nut

812.0710 M10 Plain Washer

PART NUMBER LIST

Trelawny SPT Ltd

Trelawny House, 13 Highdown Road, Sydenham Industrial Estate, Leamington Spa, Warwickshire,

CV31 1XT, United Kingdom

Telephone: +44 (0)1926 883781, Fax: +44 (0)1926 450352, Email: sales@trelawny.co.uk

Website: www.trelawnyspt.com

SURFACE PREPARATION TECHNOLOGY

Technical Specifications

Height overhaul / working height Block 970 (38.18”) / 300 (11.81”)

Width at handle bar / Block width 720 (28.34”) / 346 (13.62”)

Length 110 (43.3”)

Blows per minute 1300 x 5

Air consumption 38.0 l/s (80.0 cfm)

Working height 940mm (37.0”)

Tool Weight 114kg (251.5lbs)

Air hose bore - (Inlet Coupling 3/4" BSP claw) 19mm (0.75”)

Removal rate * 30m 2/hr (323ft 2/hr)

Depth of cut (Average)* 3.0mm (1/8””), dependent on operator

Cutting Width 290mm (11.4”)

Closest cut to wall 25 (.98”)

Noise LPA SPL 94.7 dB (A)

Vibration (AEQ)** (Primary hand position) 16.5m/s2(K= +40% -0%)

Vibration (AEQ)** (Secondary hand position) 23.1m/s2(K= +40% -0%)

Trelawny SPT Ltd operates a policy of continuous product development and refinement and therefore reserves the right

to change technical specifications and product designs without giving prior notice.

*These values are guidelines only. Test concrete surface was at least 20 year old.

**The readings given in the above table for the MHS5 Scabbler is carried out on 40N concrete.

Declared vibration emission values are in accordance with BS EN 12096: 1997

(K) Equals the factor of uncertainty, which allows for variations in measurement and production.

Vibration data figures are tri-axial, which gives total vibration emission.

Risk of Hand Arm Injury

Because of various factors, the range of vibration emission during intended use of this tool is expected to be between 23.1m/s2–

32.34m/s2.

The vibration is dependent on the task, the operators grip, and feed force employed etc.

Noise level measured in accordance with EN ISO 15744: 1999

Vibration measured in accordance with BS EN ISO 8662 Parts 1 & 14

BS EN ISO 5349-1: 2001

BS EN ISO 5349-2: 2002

Noise and Vibration Declaration Statement

This tool has been designed and produced in accordance with the following directives:

2006/42/EC Machinery Directive

and applicable harmonised standard: EN ISO 1 1148-4:2010

If your company has any problem with our products or would like to discuss the possibility of an improvement being made to them, then

please do not hesitate to contact us. Your comments are both important and appreciated.

Machinery Directive Information

SERVICING continued

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