June 2004 9507EM/5
2-36
2 to 9 Tonne Dumper Instruction Manual
Maintenance
Dismantling Centre Pivot
z Remove the two plastic dust caps from top and bottom of
the centre pivot pin.
z Remove the 1.7/8" A/F nut from top of the centre pivot.
Note : This nut has been torqued to 1,090 Nm.
z Slacken the two clamping screws in the side of front chassis
centre pivot tube to release centre pivot pin. Tap chassis pivot
pin downwards through chassis.
z Remove the clamping washer, two gaiters and two thrust
washers from each side of the centre pivot tube.
z Move front chassis away from axle and rear chassis.
z Clean centre pivot and renew all worn and damaged parts.
Re-Assembling Centre Pivot
z Align front chassis centre pivot with rear chassis and fit centre
pivot thrust washers and gaiters to top and bottom of the
pivot tube / bearings.
z With all pivots and top link aligned insert the centre pivot
pin from the bottom up.
z Align the flats machined on pin with clamping screws in
front chassis pivot tube. Tighten clamp screws sufficiently
to prevent pin rotating.
z Refit flat washer and self locking nut to top of centre pivot
pin. Fully tighten centre pivot pin nut and torque to 1,085
Nm.on the 2 to 4 tonne dumpers and 1,620 Nm on the 5 to 9
tonne dumpers. Fully tighten centre pivot pin clamp screws.
z Refit plastic dust caps to top and bottom centre pivot pin nuts.
z Reconnect steering ram to front chassis with original pin
and nut. Torque nut to 283 Nm.
z Reconnect front drive shaft to transfer box flange. Use four new
7/16"UNF x 1.3/16" bolts and nyloc nuts, tighten to 81 Nm.
z Refit front axle if it has been removed. Tighten front axle to
chassis bolts to 216 Nm. Refit handbrake cable.
z Reconnect front brake hydraulic piping. Remove clamp from
flexible brake pipe. Bleed air from braking system, see Brake
section for correct procedure.
Only use Mineral Oil (Hydraulic Oil) for Topping Up Brake System
z Reconnect all hydraulic pipes and refill hydraulic tank with
clean, fresh oil - see Lubrication section for correct grade
and quantity.
1 - Remove Dust Cap
2 - Remove Nut
& Washer
4 - Tap Centre Pivot
Pin Out Through
Bottom of Chassis
1 - Remove Dust Cap
3 - Loosen Locknuts
and Remove Clamping
Screws
1 - Position Thrust
washer and Gaiter
2 - Tap Centre Pivot Pin in
Through Bottom of
Chassis - Align Flats.
4 - Fit Washer & Nut.
Fully Tighten Nut
Fully Tighten Pivot Pin
Clamp Screws
5 - Refit Dust Cap
5 - Refit Dust
Cap
1 - Position Thrust
washer and Gaiter
3 - Tighten Clamping
Screws Sufficiently to
Prevent Pin Turning
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