DISC BRAKE ASSEMBLY REPLACEMENT/REPAIR - continued

TM 10-3930-673-34

10-3. DISC BRAKE ASSEMBLY REPLACEMENT/REPAIR (CONT)

d. Inspection.

(1)

Inspect pistons (7 and 8).

(a)

Inspect pistons (7 and 8) for

scratches and rust. Use emery cloth

to remove small scratches and rust.

Discard parts if there are large

scratches or amounts of rust.

(b)

Measure outer diameter of

pistons (7 and 8). Discard pistons if

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the outer diameter is less than

2.995 in. (76.07 mm).

(2)

Inspect brake housing (2).

(a)

Inspect piston bores and ring grooves in brake housing (2) for scratches and rust. Use emery

cloth to remove small scratches and rust. Discard brake housing if there are large scratches or

amounts of rust.

(b)

Measure inner diameter of piston bores in brake housing (2). Discard brake housing if inner

diameter of bore is more than 3.003 in. (76.28 mm).

e. Assembly.

WARNING

Use only specified parts when

assembling the disc brake caliper.

Do not mix parts from other disc

brakes calipers. If installing the

wrong parts, the disc brake will not

operate correctly and could result in

severe personal injury and

equipment damage.

NOTE

Wipe all sealing surfaces on disc

brake caliper clean and dry. Apply

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film of clean hydraulic oil to all

seals, pistons, and bores as parts are

installed.

(1)

Install four back-up rings (16), preformed packings (15), and dust seals (14) in brake

housing (2).

10-6