OPERATING THE MACHINE
5-33
M175-05-001
EMERGENCY BOOM LOWERING PROCEDURE
(Without hose-rupture safety valve)
WARNING: Prevent personal injury. Confirm that no
one is under the front attachment before starting the
procedure below.
ZX120-3 class
If the engine abnormally stalls and cannot be restarted,
lower the boom to the ground by following the emergency
procedures described below.
1. Remove rubber caps (1) and (2) from the boom 1 section
on the 4 spool control valve.
2. Turn lock nut (8) (with hexagonal width across flats: 17
mm) counterclockwise to remove with an offset box
wrench or a spanner.
3. Turn screw (7) (with hexagonal hole width across flats: 4
mm) clockwise with a hexagon wrench until it comes to
stop.
4. Turn lock nut (5) (with hexagonal width across flats: 17
mm) counterclockwise to slightly loosen with an offset
wrench or a spanner.
5. While turning screw (6) (with hexagonal hole width
across flats: 4 mm) clockwise with a hexagon wrench to
adjust the boom lowering speed, lower the boom. Do not
remove snap ring (3) and washer (4) at this time. In addi-
tion, do not turn screw (6) to such extend as washer (4) is
deformed.
IMPORTANT: Unless lock nuts (5) and (8) are sufficiently
tightened, oil leakage may increase. Be sure
to completely tighten the lock nuts (5) and
(8) to the torque specified below.
6. After the boom is lowered to the ground, allow screws
(6) and (7) to be fully loosened by turning them coun-
terclockwise. Then, turn screw (7) one eighth of a turn
clockwise and tighten lock nuts (5) and (8).
Tightening torque: 20 N•m (2 kgf•m)
7. Take care to correctly install rubber caps (1) and (2) in
their respective original position.
NOTE: Conduct the work of screw (7) and screw (6) in order.
M154-05-001
2
Boom 1
1
Control Valve
2
7
5
1
4
3
6
8
Base Machine Rear Side
Summary of Contents for ZAXIS 120-3 class
Page 1: ......
Page 3: ......
Page 5: ......
Page 49: ...SAFETY SIGNS Europe Asia Middle and Near East Model Only S 38 MEMO ...
Page 131: ...BREAK IN 2 MEMO ...
Page 191: ...TRANSPORTING 6 MEMO ...
Page 290: ...HYDRAULIC CIRCUIT AND ELECTRICAL CIRCUIT 8 HYDRAULIC CIRCUIT M1V1 08 001 ...
Page 292: ...8 ELECTRICAL DIAGRAM ...
Page 293: ...HYDRAULIC CIRCUIT AND ELECTRICAL CIRCUIT 8 MEMO ...
Page 295: ...MAINTENANCE UNDER SPECIAL ENVIRONMENTAL CONDITIONS 9 MEMO ...
Page 351: ...SPECIFICATIONS 12 42 MEMO ...
Page 455: ...OPTIONAL ATTACHMENTS AND DEVICES 13 104 MEMO ...
Page 461: ...INDEX 14 MEMO ...