Emergency Boom Lowering Procedure - Hitachi ZAXIS 17U-5N Owner's Manual

Emergency Boom Lowering Procedure

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WARNING:
 Prevent personal injury. Confirm that no one is under
the front attachment before starting the procedure
below.
 Be sure to work only after oil temperature is low or
before operation. Failure to do so may allow high
temperature oil to spray, possibly causing severe
burns.
If the engine stalls and cannot be restarted, lower the boom
to lower the bucket to the ground referring to the emergency
boom lowering procedure stated below.
1. Remove the cover above the hydraulic oil tank. Loosen
filler cap (1) on the hydraulic oil tank to release air
pressure from the hydraulic oil tank.
f
NOTE: Upper cover (5) can not be removed unless cover (4)
at the right side of hydraulic oil tank is removed for ZX17U-5N.
2. Remove bolts (2) from the front and left side of cover (3)
to remove cover (3).
3. Lower the boom in the procedures on the next page.
OPERATING THE MACHINE
5-21
1
ZX17U-5N
5
4
ZX17U-5N
1
ZX26U-5N
3
MABA-05-007
MABA-05-008
MABA-05-009
2
MABA-05-010