Komatsu 830E-AC Shop Manual page 538

1. Position and secure oiling height dimension
blocks in place (Figure 4-2). When nitrogen
pressure is released, suspensions will lower to
rest on the blocks. Ensure the blocks do not
mar or scratch the plated surfaces of the pis-
tons or damage wiper seals in the lower bearing
retainer. Support blocks must seat on the spin-
dle and the cylinder housing. The blocks should
be positioned 180° apart to provide stability.
Wear a face mask or goggles while relieving
nitrogen pressure.
2. Remove charging valve cap. Turn the charging
valve swivel nut (small hex) counterclockwise
three full turns to unseat valve seal. DO NOT
TURN LARGE HEX. The charging valve body
has a bleeder groove in its mounting threads
but for safety of all personnel the valve body
MUST NOT be loosened until ALL nitrogen
pressure has been vented from the suspension.
3. Depress the charging valve core to release
nitrogen pressure from the suspension. When
all nitrogen has been vented to the atmosphere,
the suspension should have collapsed slowly
and be seated solidly on the support blocks.
4. Remove top fill plug next to the charging valve
(Figure 4-2).
5. Fill the suspension with clean HYDRAIR
(with 6% friction modifier) until the cylinder is full
to the top of the fill plug bore. Drip pans should
be used and all spillage cleaned from outside of
the suspension. Allow the suspension to stand
for at least 15 minutes to clear any trapped
nitrogen and/or bubbles from the oil. Add more
suspension oil if necessary. Install a new fill
plug O-ring, and install the plug.
H4-6
FRONT SUSPENSION DIMENSIONS (EMPTY)
®
TRUCK MODEL &
oil
OPTIONS
830E*
830E**
* with standard Rock Body
** with Combination Body / Tailgate
Note: If truck starts to lift off blocks before charging pressure is
attained, STOP CHARGING.
Oiling and Charging Procedures
FIGURE 4-2. FRONT SUSPENSION
OILING CHARGING
HEIGHT HEIGHT
mm (IN.) mm (IN.)
25.4 (1.0) 229 (9.0)
25.4 (1.0) 229 (9.0)
CHARGING
PRESSURE
kPa (psi)
268 (9390)
282 (7410)
H04025