B
72
Repair and Service Manual
REAR HYDRAULIC REAR HYDRAULIC BRAKES
Read all of SAFETY and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
653045
Disassemble by removing the C-clip. Wire brush contact
surfaces to remove any corrosion and contaminants.
Lightly grease the pin and contact surfaces before re-
assembly.
Ensure that the C-clip is completely
seated in its' groove when finished.
Failure to do so could result in a
non-functioning parking brake if the clip comes off.
Reassembly
Apply a light coat of high temperature lubricant to shoe
support points on the backing plate, to adjuster pin, and to
anchor.
Position the adjusters so that the pins are at the
12 o'clock position.
If the wheel cylinder was removed, install it now into the
backing plate. Insert the wheel cylinder mounting bolts
and torque to specific torque value. Reconnect the brake
fluid line using new copper gaskets and banjo bolts.
Tighten the banjo bolts to specific torque value.
Position shoes on backing plate and install hold-down
springs.
Install parking brake strut with tab on strut engaged in
brake shoe web.
Place upper end of shoe webs against wheel cylinder,
and install upper shoe-to-shoe spring.
Remove wheel cylinder clamp.
Install lower shoe-to-shoe spring.
Install wheel drum, hub assembly and wheel. See “Brake
Drum Removal and Installation” in this section.
Pre-adjust shoes by rotating adjuster nut away from the
axle until shoes contact drum and then back off just
enough to eliminate drag.
Item
Torque Specification
Cylinder Bolt
120 in. lbs. (14 Nm)
Banjo Bolt
124 - 177 in. lbs. (14 - 20 Nm)
Property of American Airlines
Содержание HAULER 1200
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