Drive Belt; Adjusting Brake - Cub Cadet Big Country 640 Operator's Manual

6x4 utility vehicle
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Drive Belt

WARNING: Fingers or loose clothing can get
caught in rotating parts. Stop engine and wait
for all moving parts to stop before servicing.
Park vehicle on level surface and apply parking
brake.
Raise and secure cargo box, if manual lift.
Rotate and inspect belt for wear or damage.
Measure width of belt on top surface. The width
should be a minimum of 1.1 (27 mm).
Replace belt if worn beyond limit.
To replace belt:
Remove hardware and belt shield. See Figure 19.
Belt Shield
Chain Adjuster
Drive Pulley
(Rear)
Figure 19
Route belt over drive clutch pulley (front pulley).
Route belt from drive pulley (rear pulley).
See Figure 19.
Install new belt by routing over drive pulley (rear
pulley) and then over the drive clutch pulley (front
pulley). Install belt shield.
Clutch Pulley
(Front)

Adjusting Brake

The wet brake system is an internal part of the
transmission and it is adjusted externally without
opening the transmission. There are two sets of brakes
that may require adjustment. Each set consists of two
rotating friction plates placed between three fixed steel
plates operating in oil. Each set of brakes is operated
by it's respective lever arm. The brakes are properly
adjusted at the factory.
To adjust the brakes:
Stop the vehicle on a level surface.
Turn the ignition key to the STOP position and
remove the key.
Block the front wheels, position the shift lever into
neutral, and make sure parking brake in not
activated.
Use a jack to raise the rear wheels at least one inch
off the ground. Then use blocks or stands to
support the machine.
Disconnect brake arm return spring. See Figure 20.
Loosen the front and rear jam nuts.
Front Side
Jam Nut
Push the brake lever arm forward until the internal
brake disc stop is detected.
Run up the jam nut of the rear side until it touches
and then back off one turn.
Tighten the front side jam nut.
Check the brake pedal by hand. It should have 3/4"
free travel.
Hook up the return spring.
Rotate the rear wheels by hand with brake pedal
released. The wheels should rotate freely.
Cautiously complete the testing on level ground by
operating the machine and applying brakes in a
normal manner.
Repeat the adjustment procedure if necessary.
16
Brake Arm
Return Spring
Rear Side
Jam Nut
Figure 20

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