Routine Maintenance
Brakes
137 137
9811-3400-4
9 Press SETUP key again to select park brake test off.
10 Lower attachments and stop the engine.
11 If the machine moved during this test, adjust the park
brake and repeat the test. Refer to Park Brake
Adjustment. Do not use the machine with faulty
brakes.
If you have any queries concerning this test procedure or
park brake adjustment, consult your local JCB Dealer.
Park Brake Adjustment
!MWARNING
Over adjustment of the park brake could result in the
park brake not fully releasing.
0011
This adjustment is only for the 426 and 436 machines. The
456 has a push button park brake, this adjustment must be
done by a service engineer.
The park brake must be fully engaged when the lever is
vertical. When the park brake is engaged and the forward/
reverse lever is moved from the neutral (N) position:
– An audible alarm operates.
– The master warning light comes on.
– The ‘’PARK BRAKE’’ message is shown.
1 Disengage the park brake (the lever is horizontal).
Note: A failure to disengage the park brake fully causes
excessive wear of the park brake mechanism.
2 Pull and turn the handle grip A clockwise, one turn.
3 Test the park brake. K
Testing the Park
Brake ( T 136).
4 If the brake fails the test, do the steps 1, 2 and 3
again. If there is no more adjustment and the pin B is
at the end of its travel get the brake checked by your
JCB Dealer.
Fig 83.
Park Brake Disconnect
When fully engaged the park brake electrically disconnects
the transmission drive, this prevents the machine from
being driven with the park brake on.
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