MAINTENANCE AND REPAIR
3-2. This section covers maintenance and repair of the hoist unit. The only scheduled maintenance
procedures to be performed are a thorough inspection and lubrication to be performed every six months.
Corrective maintenance (repair) is accomplished through removal and replacement of defective parts in
accordance with instructions outlined in this section,
3-3. INSPECTION AND LUBRICATION.
3-4. Every six months, remove the end cover to expose the worm wheel and gear, and clean the gear train,
square shaft, wire rope and drum thoroughly by wiping with a clean cloth dampened in Solvent, Federal
Specification P-D-680. Inspect all parts in accordance with Table I.
3-5. After inspection, if all parts are found to be satisfactory, lubricate the unit as shown in figure 3. If
TABLE I. INSPECTION
Item to be Inspected
(Refer to Figure 4)
Check for dents, cracks, obvious
Replace damaged parts as outlined in
physical damage, loose or missing
this section. Replace and tighten
Legs (Item 2 and 3)
Replace legs if cracks are found. Slightly
Check for cracks around drilled holes
bent legs may be straightened.
in legs. Check legs for bent condition.
Replace braces if cracks are found.
Check braces for cracks or bent
Braces (Items 4 and 5)
Slightly bent braces may be straightened
Replace worn or damaged parts.
Worm gear and wheel
Check for cracks, missing teeth, signs
(Items 18 and 21)
of excessive wear.
Replace if cracked or worn. A slightly
Square shaft (24)
Check for cracks, wear, or bent
bent shaft may be straightened.
Replace a damaged drum. Replace
Check for cracks or damaged areas.
Check mounting security and con-
Replace damaged wire rope assembly.
Wire Rope assembly
Check for kinked or frayed cable.
Check for broken strands over entire
length. Check security of attachment
of hook and end fittings. Check hook
Replace damaged body.
Check bushings for wear. Check end
Body assembly 31)
frames for cracks or deformation,
around hushing bores and leg sockets.