Big Lift CB22, Operation, Maintenance And Parts Manual

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BL-CB22-1214 - 04-11-2019 8-1
SECTION 8
ELEVATION SYSTEM SERVICING
8-1. GENERAL.
The elevation system includes the outer mast, inner
mast, lift linkage, lift chains, lift cylinder and ram head.
8-2. LIFT CHAIN LENGTH ADJUSTMENT.
8-2.1. Telescopic
1. Fully lower the lift carriage.
2. Turn off the key switch (12, Figure 12-29 or 12,
Figure 12-30 ) and disconnect the batteries.
WARNING: Before attempting any adjustment, make
certain power is disconnected.
3. Loosen upper jam nuts (2, Figure 8-1 ), located
above the mounts on outer mast (18, Figure 8-2 ),
to allow for adjustment of middle jam nuts.
4. Break the lower jam nuts (2, Figure 8-1 ), located
below the mounts on outer mast free from the
middle jam nuts (2).
5. Take up slack in both lift chains with middle jam
nut (2). Strive for equal tension on both chains.
6. Align adjusting bolts (1) so each clevis pin (4) is
parallel to the mast.
CAUTION: At least 3 full threads must be present
below lower nuts (2) after adjustment.
7. Tighten jam nuts securely while maintaining align-
ment of clevis pins (4).
8. Reconnect the batteries and turn on the keyswitch
(12,
Figure 12-29 or 12, Figure 12-30 ).
9. Test chain by operating carriage. If slack is still
apparent, repeat above procedure.
Figure 8-1 Chain Assembly
R6818