Briggs & Stratton SNAPPER 5900731 Manual de usuario

Not for

Reproduction

Zero-Turn Riding Mower - 48” Mower Deck

15101454

Rev: K

Additional information concerning functional tests,

general adjustment procedures, and the location

of normal lubrication points are included in these

instructions.

Although all required lubrication and normal adjustments on

factory-assembled components are done at the factory, this

additional information is provided to assist you in ensuring that

each unit is delivered to the customer in proper working order.

Dealer Setup & Adjustment Instructions

Quick Setup List

Sections and items denoted by the Setup symbol

provide the information necessary to fully assemble,

test, and prepare the units described above for

delivery to your customers.

A Quick Setup List is provided on page 2 of this booklet

to help you identify and check that the items have been

performed.

ATTENTION SETUP PERSONNEL:

The safety warnings provided in this guide and

in the operator’s manual included with the unit

contain important information that must be obeyed

when assembling, setting-up, operating, servicing,

transporting, or storing the unit.

These warnings are highlighted by the safety alert triangle

symbol shown above, which signifies that an important safety

message is being provided.

You must read, understand, and follow these warnings and

instructions, and use safe shop and work practices at all

times while working on or around this unit and all other

outdoor power equipment.

Page Setup

Procedure Steps to Perform

2Uncrating

Remove crate & banding.

Disengage transmission release levers

Release parking brake and roll tractor

forward off skid.

Engage transmission release levers.

2Connect Battery

Connect battery.

3Unit Assembly

Assemble the ground speed control

levers.

Assemble the seat.

4Check Fluid Levels

Check tire pressures.

Check engine oil level.

Check hydraulic oil level.

5Check the Mower Assembly

Check the mower blade mounting bolt

torque.

Check & Adjust deck lift rod timing.

Check & level the mower deck.

Check deck drive belt.

Page Setup

Procedure Steps to Perform

9Lubrication & Fuel Preparation

Add fuel.

Lubricate & grease all points.

Start the engine.

10 SAFETY CHECKS

Check for LOOSE HARDWARE.

Check all OPERATOR CONTROLS.

Perform SAFETY INTERLOCK SYSTEM

CHECK.

To register the product: log onto

www.thepowerportal.com, select

the appropriate brand, click “My

Resources,” then select the “Product

Registration and Rebate” icon and

then the “New Product Registration /

Rebate” tab. Fill out and submit the

online product registration form.

Products covered by this manual:

5900731 (500ZB2648), 5900532 (500ZB2748), 5900528 (400ZB2748), 5900506 (ZT3500B2448), 5900521 (ZT3500B2748), 5900503

(2900B2748), 5900529 (2900B2748), 5901253 (400ZB2748 ANSI-EXP), 5901274 (ZT3500B2548), 5901275 (400ZB2548), 5901276 (2900B2548),

5901277 (2900B2548 ANSI-EXP), 5901407 (ZT, 48”, 25, MF, 2900, 49ST, DOM), 5901408 (ZT, 48”, 25, SMI, ZT3500, 49ST, DOM), 5901409 (ZT,

48”, 25, SNP, 400Z, 49ST, DOM), 5901406 (ZT, 48”, 21.5, SNP, 400Z, 49ST, DOM)

Not for

Reproduction

Zero-Turn Riding Mower - 48” Mower Deck

Left side

shown.

Uncrating

1. Pull both transmission release levers (A, Figure 1)

back and then down to lock the transmission release

levers in the disengaged (free-wheel) position. (B)

2. Push down the parking brake lever (C) to release the

parking brake.

3. After ensuring there are no nails or sharp objects on

the bottom skid to puncture the unit’s tires, roll the

unit forward off the bottom skid.

4. After moving the tractor, re-engage the transmissions

by pulling the transmissions release levers up and

forward to the engaged (drive) position (D).

Connect Battery

1. Connect the red positive battery cable (A, Figure 2)

to the positive battery post. Make sure that the cable

boot completely covers the positive terminal, so that

the terminal cannot cover the insulator pad (B).

2. Connect the black negative battery cable (C) to the

negative battery post.

WARNING

BATTERY SAFETY RULES

• Battery acid causes severe burns. Avoid contact

with skin.

• Wear eye protection while handling the battery.

• To avoid an explosion, keep flames and sparks

away from the battery, especially while charging.

• When installing the battery cables,

CONNECT THE POSITIVE (+) CABLE FIRST and

the negative (-) cable last. If not done in this

order, the positive terminal can be shorted to the

frame by a tool.

Figure 1 - Uncrating the Mower

Figure 2 - Connect the Battery

Not for

Reproduction

Zero-Turn Riding Mower - 48” Mower Deck

Unit Assembly

Install Ground Speed Control Levers

There is a LEFT-HAND (A, Figure 3) and a RIGHT-

HAND control lever (B). When assembled to the base,

the lever base should be pointing towards the front as

shown in Figure 3.

1. Install the ground speed control levers onto the

control lever base (C) using the 5/16-18 x 3/4” bolts,

5/16” lock washers and 5/16” flat washers (D, E & F).

Prior to tightening the bolts, align the handles with

each other.

Figure 3 - Install Ground Speed Control Levers

Ground Speed Control Lever Adjustment

The ground speed control levers can be adjusted in three

ways. The alignment of the control levers, the height of

the levers, and the placement of the levers (how close

the ends are to one another) can be adjusted.

HANDLE ALIGNMENT ADJUSTMENT

1. Loosen the mounting hardware (D, E & F) and pivot

the ground speed control lever(s) (A & B) forward or

back to align with one another.

2. Once alignment is achieved, re-tighten the mounting

hardware.

HANDLE HEIGHT ADJUSTMENT

1. Remove the mounting hardware.

2. Reposition the ground speed control lever either up

or down from its original position and reinstall the

mounting hardware.

3. Perform the Handle Height Adjustment procedure.

HANDLE PLACEMENT ADJUSTMENT

1. Loosen the placement bolt jam nut (A, Figure 4).

2. Turn the handle placement bolt (B) in or out to adjust

the amount of distance between the end of the

ground speed control levers.

Figure 4 - Handle Placement Adjustment

Install the Seat

There are two sets of holes in the seat mount plate (A,

Figure 5) for mounting the seat to the unit. Use the

forward holes for shorter operators or the aft holes for

taller operators.

1. Install the seat onto the seat mount plate and secure

with the 5/16-18 nylock flange nuts (B).

2. Connect the wire harness (C) to the seat switch (D)

that is located in the bottom of the seat.

Figure 5 - Install the Seat

Not for

Reproduction

Zero-Turn Riding Mower - 48” Mower Deck

Check Fluid Levels

Check the Engine Oil Level

1. Use the engine oil dipstick (A, Figure 8) to check the

engine oil level. If necessary add engine oil. Check

the engine manufacturer’s owner’s manual for the oil

recommendations.

Tire Pressure

Front 25 psi (1,72 bar)

Rear 15 psi (1,03 bar)

SEAT POSITION ADJUSTMENT

In addition to the two sets of holes in the seat mount

plate, the seat can also be adjusted forward or back

using the seat adjustment lever (A, Figure 6) on the

seat.

To adjust the seat:

Move the seat adjustment lever twoards the left, position

the seat as desired, and release the seat adjustment

lever to lock the seat into position.

Check / Fill Transmission Oil

Oil Type: 20W-50 conventional detergent motor oil

1. Check the oil level when the unit is cold. Raise the

seat plate to gain access to the transmission oil

reservoirs (B, Figure 8). The oil should be up to the

“FULL COLD” mark (C). If the oil is below this level,

proceed to step 2.

2. Before removing the reservoir cap, make sure

the area around the reservoir cap and fill neck of

the reservoir is free of dust, dirt and other debris.

Remove the transmission oil caps.

3. Add oil up to the “FULL COLD” mark.

4. Reinstall the reservoir cap.

Figure 8 - Check Fluid Levels

Check Tire Pressure

Tire pressure should be checked periodically, and

maintained at the levels shown in the chart (Figure 7).

Note that these pressures may differ slightly from the

“Max Inflation” stamped on the side-wall of the tires. The

pressures shown provide proper traction, improve the cut

quality, and extend the tire life.

Figure 6 - Seat Position Adjustment

Figure 7 - Check Tire Pressure

Not for

Reproduction

Zero-Turn Riding Mower - 48” Mower Deck

Check the

Mower Assembly

Check Mower Blade Mounting Bolt Torque

1. Park the machine on a flat, level surface and engage

the parking brake.

2. Lock the deck lift pedal in the 4-1/2” (11,47 cm)

position.

3. Check that blades are installed with the tabs pointing

up (D, Figure 9) toward the deck as shown in Figure

4. Check that the blade mounting bolts (A) are torqued

to 70 ft.lbs. (94 N.m.). Tighten the blade mounting

bolts if necessary. A 4 X 4 wooden block (D) placed

between the mower deck housing and the blade will

prevent the blade from turning while you tigthen the

blade mounting bolts.

WARNING

Mower blades are sharp. For your personal

safety, do not handle mower blades with bare

hands. Careless or improper handling of blades

may result in serious injury. Blade mounting

bolts must each be installed with a flat washer

then securely tightened. Torque blade mounting

bolts to 70 ft.lbs. (94 N.m.)

Figure 9 - Check Mower Blade Mounting Bolt Torque

Check Deck Lift Rod Timing

1. Park the machine on a flat level surface. Disengage

the PTO, stop the engine and engage the parking

brake. Check tires for proper inflation. See Check

Tire Pressure.

2. To check the deck lift rod timing, measure and record

the distance between the lift pivots

and the rod pivots.

Figure 10 - Check Deck Lift Rod Timing

Repeat the process for the other side of the machine.

2. If the measurements for the rods are equal, no further

adjustment is required. If the measurements are

NOT equal (greater than 1/8” (3,17 mm) difference),

adjustment is required, perform Deck Lift Rod

Timing Adjustment.

Deck Lift Rod Timing Adjustment

1. Lock the deck lift pedal in the 4-1/5” (11,47 cm)

position. Remove the cutting height adjustment pin

and lower the mower deck.

2. To ensure that the deck is in the lowest position,

push the pedal by hand towards the rear of the

machine and install the height adjustment pin in the

3” (7,6 cm) position to hold in place.

3. Block up the mower deck until all hanger chains are

slack.

Not for

Reproduction

Zero-Turn Riding Mower - 48” Mower Deck

Figure 13 - Hanger Chain Adjustment

Figure 12 - 2 x 4 Locations

4. Loosen the jam nut (A, Figure 11) on the clevis.

5. Remove the clevis pin (B) and cotter pin (C) that

fasten the clevis (D) to the lift pivot arm.

6. Turn the clevis clockwise to shorten the distance

between the rod pivots or

counter-clockwise to lengthen the distance between

the rod pivots.

7. Reinstall the clevis on the lift pivot arm and secure

with 1/2” clevis pin and cotter pin.

8. Retighten the jam nut against the clevis.

9. Remove the blocks from under the mower deck.

10.Remove the cutting height adjustment pin from

in front of the deck lift pedal arm. Lift the mower

deck and reinstall the adjustment pin in the desired

mowing height.

Figure 11 - Deck Lift Rod Timing Adjustment

Deck Leveling Adjustment

Before adjusting the deck level, the deck lift rod timing

must be checked and/or adjusted.

1. Park the machine on a flat, level surface. Disengage

the PTO, stop the engine and engage the parking

brake. Check tires for proper inflation.

2. Lock the deck lift pedal in the 4-1/2” (11,47 cm)

position. Place the deck height adjustment pin in the

4” position and lower the deck lift pedal until the arm

contacts the pin.

3. Place the 2 x 4 blocks under each corner of the

mower deck with the 3-1/2” sides being vertical.

Place a 1/4” (0,64 cm) thick spacer on top of the rear

2 x 4’s. See Figure 12.

4. Adjust the front eyebolts until the chains are tight and

the deck is still resting on the 2 x 4’s. Tighten the

jam nuts. See Figure 13.

5. Loosen the nuts and allow the rear of the deck to

rest on the 2 x 4’s and 1/4” spacers. Slide the chains

down in the slots until the chains are tight and tighten

the nuts. See Figure 13.

6. Remove all the 2 x 4’s and spacers from under the

mower deck.

Not for

Reproduction

Zero-Turn Riding Mower - 48” Mower Deck

WARNING

Use extreme caution when rotating the idler arm

with the breaker bar, due to the increased tension

in the spring as the idler arm is being rotated.

Injury may result if the breaker bar is prematurely

released while the spring is under tension.

Figure 16 - Re-seating the Deck Drive Belt

Figure 15 - Deck Drive Belt Routing

7. For your safety, DO NOT handle mower blades

with bare hands. Position the outside mower blades

so that they face front-to-back. See Figure 14.

8. Measure from the front tip of the blade from the

cutting edge to the ground.

Measure from the rear tip of the blade from the

cutting edge to the ground. Repeat this process for

the other side of the machine.

The front measurements should be 4” (10,2 cm), the

back measurements should be 4-1/4” (10,8 cm). If

the measurements are greater than 1/8” (3,17 mm) of

what they should be adjust the deck height until they

are correct.

Figure 14 - Measuring the Blade Height

Check Deck Drive Belt

1. Lower the mower deck to its lowest cutting position.

2. Remove the mower deck guards.

3. Make sure the V-side of the belt runs in the pulley

grooves. See Figure 15.

4. If the belt is not properly seated, use a 1/2” breaker

bar, and place the square end in the square hole

located in the end of the idler arm (A, Figure 16).

Carefully rotate the breaker bar CLOCKWISE, which

will relieve the tension on the belt exerted from the

idler arm.

5. Re-seat belt and carefully release the tension on the

breaker bar.

6. Reinstall the mower deck guards.

Not for

Reproduction

Zero-Turn Riding Mower - 48” Mower Deck

CHECK THE MOWER BELT IDLER TENSIONER SPRING

LENGTH

1. Park the machine on a smooth level surface such

as a concrete floor. Disengage the PTO, engage the

parking brake, turn off the engine and remove the

ignition key.

2. Lower the mower deck to its lowest cutting position.

3. Measure the coil length of the mower belt tensioner

spring (A, Figure 17). The measurement should

equal 7” (17,8 cm). If the measurement does not

equal 7” (17,8 cm), adjust the anchor eyebolt (B).

ADJUSTING THE MOWER BELT IDLER SPRING LENGTH

1. Loosen the jam nut (C).

2. Turn the adjustment nut (D) until a measurement of

7” (17,8 cm) is achieved.

3. Retighten the jam nut.

7”

(17,8 cm)

Figure 17 - Adjusting the Mower Belt Idler Spring

Length

Adding Fuel

To add fuel:

1. Remove the fuel cap (A, Figure 18).

2. Fill the tank to about 1-1/2” (3,81 cm) of the bottom of

the filler neck. This will allow for fuel expansion.

NOTE: Do not overfill. Refer to your engine manual for

specific fuel recommendations.

3. Install and hand tighten the fuel cap.

Figure 18 - Adding Fuel

A. Fuel Cap

Not for

Reproduction

Zero-Turn Riding Mower - 48” Mower Deck

Lubrication

Lubricate the unit at the locations shown below as well

as the following lubrication points.

Grease (A, Figure 19):

• front caster wheel axles and yokes

• deck lift pivot blocks

• Mower deck spindles

• mower deck idler arm

Use grease fittings when present. Disassemble parts to

apply grease to moving parts when grease fittings are

not installed.

Not all greases are compatible. Red grease (p/n

5022285) is recommended, automotive-type high-

temperature, lithium grease may be when this is not

available.

Oil (B):

• control handle pivots

• seat plate pivots

• deck lift pivots

• discharge chute hinge

Generally, all the moving metal parts should be oiled

where contact is made with other parts. Keep oil

and grease off belts and pulleys. Remember to wipe

the fittings and surfaces clean both before and after

lubrication.

Lubricating the Front Casters:

Interval: Annually.

1. Remove the 1/4-28 bolt (C) screwed into the front

caster and install a 1/4-28 grease fitting.

2. Grease the front caster.

3. Remove the 1/4-28 grease fitting and reinstall the

1/4-28 bolt.

4. Repeat the process for the other side of the machine.

Key

Figure 19 - Lubrication

Not for

Reproduction

Zero-Turn Riding Mower - 48” Mower Deck

Starting

the Engine

1. While sitting the operator’s seat, engage the parking

brake and make sure the PTO switch is disengaged

and the ground speed control levers are locked in the

NEUTRAL position.

2. Set the engine throttle control to FULL throttle

position. Then fully close the choke by pulling the

knob OUT fully.

3. Insert the key into the ignition switch and turn it to

START.

4. After the engine starts, gradually open the choke

(push knob down fully). Reduce to half throttle speed

and allow to warm up.

Warm up the engine by running it for at least a minute

before engaging the PTO switch or driving the rider.

5. After warming the engine, ALWAYS operate the unit

at FULL THROTTLE when mowing.

SAFETY INTERLOCK

SYSTEM

This unit is equipped with safety interlock switches.

These safety systems are present for your safety, do

not attempt to bypass the safety switches, and never

tamper with the safety devices. Check their operation

regularly.

Operational SAFETY Checks

Test 1 — Engine should NOT crank if:

• PTO switch is engaged, OR

• Parking brake is not engaged, OR

• Ground speed control levers are not in the

NEUTRAL position.

Test 2 — Engine SHOULD crank if:

• PTO switch is NOT engaged, AND

• Parking brake is engaged, AND

• Ground speed control levers are locked in the

NEUTRAL position.

Test 3 — Engine should SHUT OFF if:

• Operator rises off seat with PTO engaged, OR

• Operator rises off seat with parking brake

disengaged.

• Operator moves ground speed control levers out of

their neutral positions before disengaging parking

brake.

Test 4 — Blade Brake Check

Mower blades and the mower drive belt should come to

a complete stop within five (5) seconds after the electric

PTO switch is turned off (or the operator rises off seat).

If the mower drive belt does not stop within five (5)

seconds, see your dealer.

NOTE: Once the engine has stopped, PTO switch must

be turned off, parking brake must be engaged, and

the ground speed control levers must be locked in the

NEUTRAL position after the operator returns to the seat

in order to start the engine.

WARNING

If the unit does not pass a safety test, do not

operate it. See your authorized dealer. Under no

circumstance should you attempt to defeat the

purpose of the safety interlock system.

Perform

the Safety Checks

Functional Tests

1. Check the tractor for loose bolts, screws, nuts, etc.

2. Start the engine and check all the controls for proper

operation: ground speed control levers, parking

brake, throttle cable, electric PTO clutch, etc.

3. Stop the engine and check for fluid leaks: oil, fuel and

hydraulic oil.

4. If any control fails to operate properly during testing

or seems to be out of adjustment, check and

readjust it according to the following Adjustments

Procedures section.

5. Perform the operational safety checks as detailed in

the Safety Interlock Section.

WARNING

Disengage the PTO, stop the engine, set the parking

brake, and wait for moving parts to stop before

leaving operator’s position for any reason.

If the tractor does not pass the test, do not

operate tractor. Under no circumstance should

you attempt to defeat the purpose of the safety

system.

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