Komatsu PC1250-11, Original Instructions Manual

Page: 386 / 452

2) Turn the starting switch to ON position (B).
3) Operate the operating portion (g) of the lock lever to
set it securely to FREE position (F) and then operate
the work equipment control levers fully in LOWER di-
rection and check that the work equipment is lowered
to the ground.
If the work equipment goes down under its weight and contacts
the ground, the accumulator is normal.
If the work equipment does not go down or stops in midway,
the charged pressure of the gas in the accumulator for the hy-
draulic circuit has probably dropped. Ask your Komatsu distrib-
utor for inspection.
This completes the inspection. After completion of the inspection, set the work equipment lock lever to LOCK
position and turn the starting switch to OFF position (A).
METHOD FOR RELEASING PRESSURE IN ACCUMULATOR
k k
WARNING
• The hydraulic system is always under internal pressure. Before checking or replacing the pipes and
hoses, release the pressure from the circuit. Otherwise, the high pressurized oil may spurt out and
it may cause serious personal injury or death.
• Immediately after the engine is stopped, its parts and oil are still very hot, and may cause burn in-
jury. Wait for the temperature to go down, and then start the work.
• If the oil filler cap is removed without releasing the internal pressure, oil will spurt out. Turn the oil
filler cap slowly to release the internal pressure, then remove it carefully.
MAINTENANCE PROCEDURE MAINTENANCE
4-70