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CHAPTER 2 MAINTENANCE
NMC-WOLLARD
2021 Truax Blvd. Eau Claire, WI 54703 ● P: 715-835-3151● F: 715-835-6625 ● www.nmc-wollard.com
TML-704H Maintenance Lift Manual No. 310547
spindle with slot in nut. Check hub for excessive end play. Excessive end
play indicates that nut is too loose. Hub should rotate freely, but if hub
binds or if you can feel the bearings, it means that the nut is too tight.
Readjust nut if needed.
17. Insert cotter pin and bend to lock it on nut. Fill grease cap with grease and
snap into place.
18. Check seal for a turned-under lip. Rotate hub and check for any indication
of misalignment or roughness. If either is noted, disassemble hub and.
check inner cups for any small nicks or other damage. If damaged, the hub
must be replaced.
19. Using a C-clamp (surface that contacts pad MUST be clean.) on each
piston, force pistons into caliper to allow caliper to fit over disc.
20. Reassemble brake caliper to caliper bracket. Insert retaining bolts and
reinstall cotter pins. Tighten bolts to 35 ft-lbs torque (Brierton axle).
21.
Lube all grease fittings with MIL-G-10924D grease.
22. Adjust toe-in of front wheels.
4.2.2 Steering Knuckle/King Pin Repair (Brierton Only)
• Bore for King Pin in tube at the end of the axle beam: 1.112” to 1.114”
(28.24 mm to 28.30mm). If the bore is too large, the entire axle beam must
be replaced.
• King Pin Diameter: 1.1080” to 1.1085” (28.143 mm to 28.156 mm)
• Vertical movement of the knuckle relative to axle beam: 0.015” (0.38 mm)
maximum (in other words, the thickness of the smaller shim)
• King Pin Bushings: When new or installed per the repair instructions, there
should be no lateral movement between the two bushings and the pin. The
amount of wear that is considered acceptable is up to the customer, except
that it should not exceed 0.010” (0.25 mm) measured at the bushing. This
will ensure that the bronze portion of the bushing inner wall is never worn through.
1. Disassembly Step 1
4 REPAIRS
SEPTEMBER 01, 2015
Property of American Airlines
