Brakes
Assembly
1 Remove all traces of old sealant from the mating faces
of the drive head and the brake piston housing.
2 Fit new seals 17 and 16. Make sure they seat squarely
in their grooves.
3 Carefully press the piston 15 all the way into its housing
7. Make sure the brake back off holes in the piston and
housing align.
4 Apply JCB Threadlocker and Sealer to threads of back
off pins 12. Screw the back off pins 12 into the brake
piston and fit the springs 14 over the back off pins.
5 Place the tension bush 13 over the back off pin 12.
Using a suitable tool (steel tube) drive the tension bush
onto the back off pin using a soft face hammer until the
circlip 11 can just be fitted.
6 Apply JCB Multigasket to the drive head mating face,
then fit the brake piston housing assembly. Ensure that
the match marks made during dismantling are aligned.
7 Fit capscrews 9 and torque tighten to 56 Nm (42 lbf ft,
5.7 kgf m).
8 Remove the differential support.
9 Assemble the five friction plates and six counterplates 2
onto the brake carrier 3. If the original brake pack is
being re-used, return the plates to their original
positions, refer to Dismantling. Soak new friction plates
in JCB Special Gear Oil before assembly. Fit circlip 4.
Note: On assembly of the brake packs, the oil flow holes B
must be aligned with each other when being fitted to the
brake plate carrier.
10 Locate the three reaction pins 5 into their grooves,
securing them with grease. Push the pins fully into their
location holes in the housing.
11 Install one counterplate 2 into the housing, then the
brake pack, then the other counterplate. Return re-used
counterplates to their original positions. Push the brake
pack fully home.
54 - 4
Section F
Transmission
9803/7130
Section F
54 - 4
Issue 1
Rear Axle
12 Apply JCB Multigasket to the mating face of the drive
head, and JCB Threadlocker and Sealer to the threads
of bolts 1. Locate the axle arm onto the drivehead, with
the embossed word 'TOP' on the axle arm uppermost.
13 Fit bolts 1 and torque tighten to 98Nm (72lbf ft, 10 kgf m).
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