Komatsu PC118MR-8 Operation And Maintenance Manual page 370

MAINTENANCE PROCEDURES
Accumulator operation check
Before starting check operations, make sure that no person or other obstacles are in the surrounding
area.
Replace the accumulator every 2 years or 4000 hours, based on the situations checked before.
Check nitrogen loading pressure as follows.
1. Park the machine on firm and level ground.
2. Place the working tool as extended as possible (fully
extended boom and bucket in discharge position) and keep
it 1.5 m (A) away from the ground..
REMARK
Carry out the operations described in points 3-5 within 15
seconds.
Pressure in the accumulator descends gradually when the
engine is stopped. Therefore, the check must be carried out
immediately after the engine is stopped.
3. Keep the working tool at the maximum distance, turn the
start-up key to OFF and stop the engine.
4. Turn the starter key to ON.
4-84
CAUTION
WEAM014802
MAINTENANCE