TM-5-2330-378-14-P

SEMITRAILER, LOWBED: 40 TON CONSTRUCTION EQUIPMENT TRANSPORTER M870 AND M870A1

TECHNICAL MANUAL; OPERATOR'S, UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)

JUNE 1999

TM-5-2330-378-14-P - Page 191 of 524

TM5-2330-378-14&P

4-46. BRAKESHOE REPLACEMENTANDMAINTENANCE(continued).

CAUTION

Donotgetgrease,oil,solvent,orfingerprintsonbrakeliningsurfaces.Greaseor oil

will glazethe brakeliningsandresultIn unevenbraking.

1.

Using drycleaning solvent and brush, clean spring (10), two anchorpins (7), and cam rollers (14).

2.

Inspect brake linings (15) for damage and wear.

If brake linings are worn to within 1/16 inch of rivet heads,

replace brakeshoes (8 and 9).

3.

Inspect S-cam (16) for wear or damage.

If worn or damaged, notify Direct Support maintenance.

c.

INSTALLATION

1.

On the M870A1, install nut (3), washer (2), and bolt (1) on backing plate (4).

2.

Install two cam rollers (14) and roller retainers (13) on two brakeshoes (8 and 9).

3.

Install two brake spring retainer pins (12) on two brakeshoes (8 and 9).

4.

Install spring (10) on two brake spring retainer pins (12).

5.

Have assistant hold brakeshoes (8 and 9) in position on axle (11). Install two anchor pins (7) on two brakeshoes

(8 and 9) and brake backing plate (4).

6.

Install four anchor pin washers (6) and anchor pin retaining rings (5) on two anchor pins (7).

7.

On M870A1, torque nut (3) and bolt (1) on backing plate between 100 and 120 ft-lb (136 and 163 N-m).

FOLLOW-ONTASKS:

• Install hub and brakedrurn (pare 4-68 or4-69).

• Install tire and wheel assembly (para 3-9 or 3-10).

• Adjust brakes (para 4-47).

• Check operation of brakes (para 2-9).

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