MAINTENANCE MAINTENANCE PROCEDURE
4-61
RELEASING INTERNAL PRESSURE IN HYDRAULIC IDLER CUSHION
1. Lower the work equipment to the ground and stop the
engine. Operate the work equipment control lever for sev-
eral times to release the remaining pressure in the piping.
Slowly loosen oil filler cap (F) of the hydraulic tank and
release the internal pressure inside the tank.
2. Slowly loosen drain valve (1) installed inside the axle and
let the remaining pressure inside the circuit to be released.
After more than 1 minute has passed, the internal pressure
is completely released. Be sure to loosen it slowly. If it is
loosened suddenly, high pressure is generated in the tank
circuit.
3. After releasing the remaining pressure completely, tighten
drain valve (1).
4. Tighten oil filler cap (F) of the hydraulic tank.
(R) Machine's rear side
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