Komatsu 830E-AC Shop Manual page 697

Installation
Follow this procedure when installing an accu-
mulator that was in storage. This procedure also
applies to newly purchased accumulators.
1. Install the pressure gauges on the accumulator
and check the pressure. Refer to Steering
Accumulator Charging in this chapter.
a. If the pressure is 165 kPa (24 psi) or less,
slowly drain off any nitrogen and proceed to
Step 2.
b. If the pressure is between 172 kPa (25 psi)
and 690 kPa (100 psi), set the regulator to
690 kPa (100 psi) and slowly charge the
accumulator to 690 kPa (100 psi). Discon-
nect the pressure gauges from the accumu-
lator. Proceed to Step 7.
2. Remove the gauges from the accumulator.
3. Lay accumulator on a suitable work bench so
that the hydraulic port is higher than the other
end of the accumulator. Remove plastic dust
cap from hydraulic port.
4. Pour clean C-4 hydraulic oil (approximately 5%
of the total accumulator volume, see Table 1)
into the accumulator through the hydraulic port.
Allow time for the oil to run down the inside of
the accumulator and reach the other end.
5. Lay the accumulator flat on the work bench (or
floor) and slowly rotate accumulator two com-
plete revolutions. This will thoroughly coat the
accumulator walls with a film of oil necessary
for bladder lubrication during precharging.
L05035
6. Stand the accumulator upright and secure.
Install the pressure gauges and charge the
accumulator first to 172 kPa (25 psi), then to
690 kPa (100 psi). Remove the gauges from the
accumulator and install a plastic dust cap over
the hydraulic port assembly. The fill time to
reach 172 kPa (25 psi) is approximately four
minutes.
7. Install the accumulator on the truck.
8. Charge the accumulator to operating pressure.
Refer to Steering Accumulator Charging in this
chapter to fully charge the accumulator to the
correct operating precharge pressure.
Bladder Storage Procedures
The shelf life of bladders under normal storage con-
ditions is one year. Normal storage condition con-
sists of the bladder being heat sealed in a black
plastic bag and placed in a cool dry place away from
sun, ultraviolet and fluorescent lights as well as elec-
trical equipment. Direct sunlight or fluorescent light
can cause the bladder to weather check and dry rot,
which appear on the bladder surface as cracks.
Steering Component Repair L5-13