Komatsu 830E-AC Shop Manual page 540

11. Close outlet valves (3) and remove charging kit
components. Refer to Removal of Charging Kit.
12. If charging valve is being reused, tighten swivel
nut (4, Figure 4-3) to 5.4 N·m (4 ft lbs) torque.
13. If a new charging valve is being used, tighten
swivel nut to 14.2 N·m (10.5 ft lbs) torque, then
loosen and retighten swivel nut to 14.2 N·m
(10.5 ft lbs) torque. Again loosen swivel nut
and retighten to 5.4 N·m (4 ft lbs) torque.
Replace valve cap (1) and tighten to 3.3 N·m
(2.5 ft lbs) torque (finger tight).
14. Install protective guard over charging valve.
15. Raise the truck body in order to extend the front
suspensions and allow for removal of the nitro-
gen charging blocks. Ensure that sufficient
overhead clearance exists before raising the
body. If the suspensions do not extend after
raising the body, turn the steering wheel from
stop to stop several times. If the suspensions
still do not extend enough to allow for removal
of the blocks, use a crane or floor jacks to raise
the truck and remove the blocks.
Any time the suspensions are recharged, the calibra-
tion of the Payload Meter system is affected. Refer to
the Payload Meter III ™ section and perform a
"Clean Truck Tare". This will ensure accurate pay-
load records.
®
The front HYDRAIR suspensions are now ready for
operation. Visually check the extension with the truck
both empty and loaded. Record the extension dimen-
sions. Maximum downward travel is indicated by the
dirt ring at the base of the piston. Operator com-
ments on steering response and suspension rebound
should also be noted.
H4-8
REAR SUSPENSION
1. Park the unloaded truck on a hard, level sur-
face. Apply the parking brake, and chock the
wheels.
2. Thoroughly clean the area around the charging
valve on the suspensions. Remove the protec-
tive covers from the charging valves and the
metal covers from the suspension piston.
When the blocks are in place on a suspension,
they must be secured in place with a strap or
other means to insure the blocks staying in place
while being used. An unsecured block could fly
loose as weight is applied, presenting the possi-
bility of serious injury and/or damage.
NOTE: For longer life of suspension components, a
Friction Modifier must be added to the suspension
oil. See Specifications Chart, Figure 4-5 at the end of
this chapter.
Rear Suspension Oiling
1. If the suspensions are extended, position and
secure oiling height dimension blocks (sup-
ports) in place (See Figure 4-4) so the blocks
are seated between the piston flange and the
cylinder housing. Ensure the blocks do not mar
or scratch the plated surfaces on the piston or
damage the wiper seals in the cylinder barrel.
Support blocks must seat on the piston flange
and the cylinder housing. The blocks should be
positioned 180° apart to provide stability.
Make certain all personnel are clear and support
blocks are secure before relieving nitrogen pres-
sure from the suspension. Use a face mask or
goggles when venting nitrogen.
Oiling and Charging Procedures H04025