Blue Giant BGN-40, Owner'S Manual

Page: 47 / 126

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 (1, Figure 12-24 ) and dis-
connect the batteries.
WARNING: Before attempting any adjustment, make
certain power is disconnected.
3. Loosen jam nuts (2, Figure 8-1 ), located the
above the mount of outer mast (20, Figure 8-2 ), to
allow for adjustment of middle jam nut.
4. Break the lower jam nuts (2, Figure 8-1 ), located
below the mount of outer mast, free from the mid-
dle 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 anchors (1) so each clevis pin (4) is parallel
to outer mast cross (20,
Figure 8-2 ).
CAUTION: At least 3 full threads must be present
below lower nut (2,
Figure 8-1 ) after
adjustment.
7. Tighten jam nuts securely while maintaining align-
ment of clevis pins (4).
8. Reconnect the batteries and turn on the keyswitch
(1,
Figure 12-24 ).
9. Test chain by operating carriage. If slack is still
apparent, repeat above procedure.
Figure 8-1 Chain Assembly
R6818
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