TM 9-2320-280-20-2
7-22. REAR DUAL SERVICE/PARKING BRAKE CALlPER MAINTENANCE (Cont’d)
b. Cleaning and Inspection
N O TE
Apply a light coat of grease on adapter slides.
1. Clean mating surfaces of caliper (1) and adapter (7) and lubricate adapter slides with grease.
2. Clean cooling fins of rotor (6).
3. Inspect caliper (1) and caliper piston face (4) for cracks, pitting, or damage. Replace caliper
assembly if cracked, pitted, or damaged.
4. Inspect caliper cable bracket (5) for looseness, damage, and rotation. If loose, damaged, or
repositioned, replace caliper assembly (1).
5. Inspect dust boot (3) for tears or deterioration. Replace caliper assembly if dust boot (3) is torn or
deteriorated.
6. Inspect rotor (6) for heat cracks, discoloration, pitting, or damage. Replace rotor (6) if cracked,
pitted, or scored (para. 7-19).
7. Inspect yoke locating pins (12) for cracks or corrosion. Perform step 8 if cracked or corroded. If not,
perform step 9.
8. Using 7 mm hex driver, remove locating pins (12) from yoke (11). Discard locating pins (12).
9. Inspect brake pads (8) for glazing, oil saturation, or wear. If glazed, oil saturated, or if brake pad
thickness is less than 1/8 in. (3.2 mm), replace both pads (8) and pads on opposite caliper
(para. 7-21).
CAUTION
Ensure that grease and oil are not in contact with rotor and/or
brake shoe friction surfaces. Failure to do so will result in
damage to equipment and poor performance.
c. Installation
1. Open bleeder valve (2) and depress piston (4) into caliper (1) while rotating piston (4) in a clockwise
direction, and at the same time apply pressure until piston (4) is seated in piston bore.
N O TE
Perform step 2 only if yoke locating pins were removed.
2. Apply sealing compound to threads of locating pins ( 12) and install locating pins (12) in yoke (11)
using 7 mm hex head driver. Tighten locating pins (12) to 25-35 lb-ft (34-47 Nom).
3. Slide yoke (11) and locating pins (12) into caliper (1).
4. Apply sealing compound to tapped holes of adapter (7).
5. Install caliper (1) and yoke (11) on adapter (7) with two washers (10) and capscrews (9). Using
crowfoot, tighten capscrews (9) to 30-40 lb-ft (41-54 N.m).
6. Install copper washer (15) and coupling (14) on caliper (1) and Connect brake line (13) to coupling (14).
7. Install parking brake cable (24) on caliper cable bracket (18) with clip (19).
CAUTION
Ensure lever is in contact with caliper cable bracket stop.
Damage to equipment and poor performance will result if not
alined properly.
Ensure that the clevis and clevis pin are alined to lever. Do not
move the lever to accommodate a misadjusted clevis, or damage
to equipment and poor performance will result.
8. Check position of lever (17) and ensure it is in contact with caliper cable bracket stop (16).
9. Install parking brake clevis (22) to lever (17) with clevis pin (23), washer (21), and cotter pin (20).
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