SECTION 7
ELEVATION SYSTEM SERVICING
7-1. GENERAL.
The elevation system includes the outer mast, inner
mast, lift linkage, drag chains, lift chains, lift cylinder
and ram head.
7-2. LIFT CHAIN LENGTH ADJUSTMENT.
1. Fully lower the Platform (Figure 7-4).
2. Engage the emergency power disconnect switch
and turn off key switch.
WARNING: Before attempting any adjustment, make
certain power is disconnected.
3. Loosen jam nut (Figure 7-1) to allow for
adjustment.
4. Break the lower jam nut free from the top nut.
5. Take up slack in the lift chain with top nut.
6. Align anchor so the clevis pin is parallel to the
mast.
7. Ensure the chain slack
actuators are not closing
the switch.
CAUTION: At least 3 full threads must be present
below lower nut after adjustment.
8. Tighten jam nuts securely while maintaining
alignment of clevis pin.
9. Disengage the emergency power disconnect
switch and turn on key switch.
10. Test chain by operating Platform. If slack is still
appar
ent, repeat above procedure.
Figure 7-1 Chain Assembly
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