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15. When installing the counterweight for the first time,
check the adjustment of removal/install device
according to the procedure given below. When installing
counterweight is not the first time, start from step 16.
15.1 Adjust bolts (27) of lifting yoke (6) to length (A).
Length (A): 70±2 mm (2.8±0.08 in)
15.2 Slowly raise the counterweight until counterweight
bosses (26) fit to the mainframe (25) holes. The
clearance between counterweight bosses (26) and
mainframe (25) is 5 to 10 mm. Align the bottom of
counterweight bosses (26) to the bottom of main
frame (25) holes (within 0 to 5 mm).
Check whether bolts (11) can be inserted in the main
frame holes or not. If alignment of the counterweight
bosses (26) to the mainframe (25) holes is out (Bosses
can not be set into holes), lower the counterweight
to the ground and adjust length (A) as required. After
adjusting to correct length (A), tighten lock nuts (8).
Tightening torque: 250 N·m (25 kgf·m, 180 lbf·ft)
IMPORTANT:
Length (A) should not be longer than 90 mm (3.5 in).
Otherwise, it may cause damage to bolts.
Stop cylinder operation when bosses are set to the
mainframe holes. Do not raise the cylinder once the
bosses are engaged with the main frame holes.
16. Ensure length (A) is correct and lock nuts (8) are not
loose.
COUNTERWEIGHT INSTALLATION
11
14
27
A
8
6
MJAA-NACW1-002
0 to 5 mm
5 to 10 mm
M1J3-13-004
25
26
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