TM 9-2350-247-20-1
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDING
LUBRICATION INSTRUCTIONS — Continued
0128 00
1)
Inspect seals that are composition—type, rings, and preformed packings for wear, brittleness, cracks, cuts, and
damage.
2)
Inspect lip seals for cracks, wear, cuts, and brittleness. Inspect springs and seal shells for damage.
3)
Gaskets and seals on electrical parts may be reused. Inspect gaskets and seals for wear, nicks, cuts, and torn or
missing gasket material. Replace gasket, if needed.
k.
SPLINED PARTS. Inspect splined parts for burrs, wear, twisted, cracked, or broken splines.
l.
THREADED PARTS. Inspect all threaded parts for burrs and stripped or damaged threads.
m.
RETAINING RINGS. Inspect retaining rings for nicks, burrs, defects, loss of tension, and wear.
n.
SPRINGS. Inspect springs visually for wear, defects, breaks, and loss of tension or compression.
o.
SHAFTS AND SPINDLES. Inspect shafts and spindles for excessive wear, binding, scores, cracks, and burrs.
p.
ELECTRICAL PARTS.
1)
Inspect electrical parts before you install them. Look for mildewed, corroded, or burned parts.
2)
Inspect electrical parts for pinched or loose wires and for cracked or broken wires, circuit cards, relays, and
connectors.
3)
Inspect insulation and heatshrink tubing for cracks, tears, burns, or missing material.
q.
CANVAS COVERS AND ROPES.
1)
Inspect canvas covers and webbing for holes, cuts, seam tears, and mildew.
2)
Inspect ropes and webbing for broken strands. If more than half the strands are broken, replace rope or
webbing.
4.
REPAIR
a.
GENERAL. General repair procedures are given in steps b through l below. Special procedures are covered in the
task. After procedures, clean all parts well.
b.
CASTINGS.
1)
Replace all cracked or broken castings.
2)
Repair minor damage to machined surfaces of castings with cleaning cloth (WP 0542 00, Item 8). Replace any
part with defects that cannot be corrected or which will impair function.
c.
Repair minor surface bends by working bent surface of casting across sheet of crocus cloth on surface plate.
Replace bent castings which would impair assembly or function.
d.
BEARINGS. See TM 9-214 for inspection and maintenance of needle roller or ball bearings.
e.
BUSHINGS AND BUSHING-TYPE BEARINGS. Replace bushings and bushing-type bearings if they are loose,
scored, or have color change due to heat. When you replace bushings and bushing-type bearings, check nearby
parts for damage or wear.
f.
OIL SEALS. Oil seals must be replaced when thin feather edge is damaged or when seal material is brittle.
1)
Press damaged oil seal from casting. Be careful not to damage bore.
2)
When oil seal bore is damaged so an oil-tight seal is impossible, replace casting or adapter. Remove slight
nicks, burs, and scratches with cleaning cloth (WP 0542 00, Item 8) dipped in cleaning compound
(WP 0542 00, Item 9).
3)
Install new oil seal in casting bore or adapter using suitable oil seal replacement tool.
0128 00-10
