Bobcat S150. Instruction - page 23

S150 Bobcat Loader

77

Operation & Maintenance Manual

TIRE MAINTENANCE

Wheel Nuts

Figure 152

For the service interval to check the wheel nuts (See
SERVICE SCHEDULE on Page 53).
The correct torque
is 142-156 Nm torque [Figure 152].

Rotating

Check the tires regularly for wear, damage and pressure.

IMPORTANT

Inflate tires to the MAXIMUM pressure shown on the
sidewall of the tire. DO NOT mix brands of tires used
on the same loader.

I-2057-0794

Figure 153

Rear tires usually wear faster than front tires. To keep tire
wear even, move the front tires to the rear and rear tires
to the front [Figure 153].

It is important to keep the same size tires on each side of
the loader. If different sizes are used, each tire will be
turning at a different rate and cause excessive wear. The
tread bars of all the tires must face the same direction.

Recommended tire pressure must be maintained to avoid
excessive tire wear and loss of stability and handling
capability. Check for correct pressure before operating
the loader.

Mounting

Tires are to be repaired only by an authorized person
using the proper procedures and safe equipment.

Tires and rims must always be checked for correct size
before mounting. Check rim and tire bead for damage.

The rim flange must be cleaned and free of rust.

The tire bead and rim flange must be lubricated with a
rubber lubricant before mounting the tire.

Avoid excessive pressure which can rupture the tire and
cause serious injury or death.

During inflation of the tire, check the tire pressure
frequently to avoid over inflation.

P-45220

B-9976

S150 Bobcat Loader
Operation & Maintenance Manual

78

FINAL DRIVE TRANSMISSION (CHAINCASE)

Checking And Adding Oil

The chaincase contains the final drive sprockets and
chains and uses the same type of oil as the hydraulic/
hydrostatic system (See Hydraulic System on Page 101).

Stop the loader on a level surface and stop the engine.

Figure 154

Remove the drain plug (1) [Figure 154] from the front of
the chaincase housing.

If oil can be reached with the tip of your finger through the
hole, the oil level is correct.

If the level is low, add oil through the check plug hole until
the oil flows from the hole.

Install and tighten the plug.

Removing Oil From The Chaincase

Figure 155

Remove the check plug (1) [Figure 155] from the front of
the chaincase housing.

Figure 156

Use a pump to suction the oil from the chaincase
[Figure 156].

Recycle or dispose of the used oil in an environmentally
safe manner.

1

P-31287

P-1616

1

P-31287A

S150 Bobcat Loader

79

Operation & Maintenance Manual

FAN GEARBOX

For the correct service interval (See SERVICE
SCHEDULE on Page 53).

Checking And Maintaining

Raise the operator cab (See Raising The Operator Cab
on Page 56).

Figure 157

Remove the plug (1) [Figure 157]. Lubricant level must
be at the bottom edge of the plug hole.

If the level is low, add SAE 90W gear lubricant through
the check plug hole until lubricant flows from the hole.

Install and tighten the plug.

Lower the operator cab. (See Lowering The Operator
Cab on Page 57.)

DRIVE BELT

Adjusting The Drive Belt

Stop the engine.

Open the rear door and disconnect the negative (-) cable
from the battery.

Figure 158

Loosen the bolt (1) [Figure 158] on the spring loaded
drive idler.

NOTE: The pointer will be at the 1 o’clock position (2)

[Figure 158] when the belt tensioner is not
under spring tension.

Figure 159

Push the idler pulley against the belt, using a pry bar (1)
[Figure 159]. The pointer will be at the 3 o’clock
position (2) [Figure 159] when the idler pulley is against
the stop (maximum movement).

Raise the idler assembly slightly so that the pulley is
operating on spring tension and not against the stop.

NOTE: Do not set the idler against the travel stop in

the 3 o’clock position.

Tighten the mounting bolt (1) [Figure 158] to 34-38 Nm
torque.

Run the engine for a few minutes. Stop the engine and
recheck the pointer position. Readjust if necessary.

After the belt has been in service, readjust when the
pointer reached the 1 o’clock position.

Install the belt shield and fasteners. Connect the
negative (-) battery cable. Close the rear door.

Replacing The Drive Belt

Loosen and remove the drive belt tensioner assembly.

Remove the fan belt. Remove the drive belt from the
pump pulley and then from the flywheel.

Install new drive belt. Install the belt tensioner assembly.

Install the fan belt.

Adjust the drive belt.

P-48090

1

N-18436

2

1

N-18454

2

1

S150 Bobcat Loader
Operation & Maintenance Manual

80

SPARK ARRESTOR MUFFLER

Use the correct service interval for cleaning the spark
arrestor muffler. (See SERVICE SCHEDULE on
Page 53.)

Do not operate the loader with a defective exhaust
system.

IMPORTANT

This loader is factory equipped with a spark arrestor
muffler. It is necessary to do maintenance on this
spark arrestor muffler to keep it in working condition.
The spark arrestor muffler must be serviced by
dumping the spark chamber every 100 hours of
operation.

If this machine is operated on flammable forest,
brush or grass covered land, it must be equipped
with a spark arrestor attached to the exhaust system
and maintained in working order.

Make reference to local laws and regulations for
spark arrestor requirements.

I-2022-0595

Stop the engine and open the rear door.

Figure 160

Remove the plug (1) [Figure 160] from the bottom of the
muffler.

WARNING

When the engine is running during service, the
steering levers must be in neutral and the parking
brake engaged. Failure to do so can cause injury or
death.

W-2006-0284

Start the engine and run for about 10 seconds while a
second person, wearing safety goggles, holds a piece of
wood over the outlet of the muffler.

This will force contaminants out through the cleanout
hole.

Stop the engine.

Install and tighten the plug.

Close the rear door.

WARNING

When an engine is running in an enclosed area, fresh
air must be added to avoid concentration of exhaust
fumes. If the engine is stationary, vent the exhaust
outside. Exhaust fumes contain odorless, invisible
gases which can kill without warning.

W-2050-1285

WARNING

Stop engine and allow the muffler to cool before
cleaning the spark chamber. Wear safety goggles.
Failure to obey can cause serious injury.

W-2011-1285

WARNING

Never use machine in atmosphere with explosive
dust or gases or where exhaust can contact
flammable material. Failure to obey warnings can
cause injury or death.

W-2068-1285

P-45498

1

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