JLG 12SP - Mast Chain;Cable;Sequence Cable Adjustment Components. (Typical)

SECTION 2 - SERVICE PROCEDURES
3120775 – JLG Lift – 2-31
one side or the other.
The threaded end of the chain/cable may need to be
restrained while tightening the adjust nut to keep the
chain/cable from twisting.
7. Retract the mast all the way and check if the top of
the mast sections appear as shown in Figure 2-6.
8. Repeat steps (1) through (7) for remaining mast sec-
tions.
9. Once mast section adjustment is completed, apply
loctite #242 to the threads under the (jam) nuts that
were loosened. Then re-tighten the loosened (jam)
nuts until tight against the top (adjust) nut. Chain/
cable should have slight tension but should not be
taut.
10. After all mast adjustments are complete, if neces-
sary adjust the bumpers on the underside of the
stock-picker platform so the platform rests slightly
above the base frame when it is lowered and empty.
Figure 2-6. Mast Chain/Cable/Sequence Cable Adjustment Components. (Typical)
SECTION-1
FIXED
TO BASE
SEQUENCE CABLE
ADJUST NUT
CHECK IF OVERALL HEIGHT
OF MACHINE FROM
FLOOR TO TOP OF MAST
IS WITHIN SPECIFICATION
SECTION-2
EXTENDED BY
CYLINDER
SECTION-5
(PLATFORM
HEADER SECTION)
EXTENDED BY
CHAIN/CABLE
CHAIN/CABLE
ANCHOR PLATE
ADJUST NUT
JAM NUT
THREADED
CHAIN/CABLE
END
SECTION-4
EXTENDED BY
CHAIN/CABLE
SECTION-3
EXTENDED BY
CHAIN
STEP APPROXIMATELY
1/4 in. (7mm)
MA
S
T
S
IDE PR
O
FILE
MAST CHAIN/CABLE ADJUSTER
S
Note: When
p
ply Loctite #242 to the
threads under the jam nut.
.
chain adjustment
is complete, before
tightening the jam nut
against the adjust nut,
a