4-6
Operating the Truck
SUSPENSION RIDE STRUTS
Suspension ride struts are oiled and charged with nitrogen to ensure optimum
ride comfort. However, ride struts may have been lowered during transportation
of the machine. These struts must be correctly set prior to operating the
machine.
The ride struts contain a mixture of nitrogen and oil, so when the struts are
lowered, some oil will be lost along with the nitrogen. Although only a small
amount of oil may be lost, this will still affect the final ride height, so it is
important that ride struts contain the correct volume of oil.
To recharge the ride struts, nitrogen pressures are given in the table below.
These pressures are dependant on oil levels being correct, refer to Section 180,
SUSPENSION SYSTEM in the Maintenance Manual. Use suitable lifting
equipment to fully extend ride struts and charge with nitrogen.
Note: The heights given are intended as reference only, cylinders should always
be set according to pressure. Refer to Section 180, SUSPENSION SYSTEM in
the Maintenance Manual for full details.
Note: It is advised to charge the ride struts by an additional 1.4 bar ( 20 lbf/in
2
) to
allow for pressure lost while carrying out pressure checks.
After recharging, the machine should be operated to allow ride struts to settle.
Then if ride heights are incorrect, the oil levels should be checked.
Truck TR35 TR40 TR45 TR60 TR70 TR100
Front Ride Struts - bar (lbf/in
2
) 11.7 (170) 13.8 (200) 13.8 (200) 13.8 (200) 17.2 (250) 16.3 (240)
Height - mm (in) 143 (5.6) 168 (6.6) 168 (6.6) 168 (6.6) 158 (6.2) 158 (6.2)
Rear Ride Struts - bar (lbf/in
2
) 5.5 (80) 7 (100) 7 (100) 8.3 (120) 8.3 (120) 8.3 (120)
Height - mm (in) 365 (14.4) 556 (21.9) 556 (21.9) 505 (19.9) 378 (14.9) 381 (15)
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