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 192 of 524

TM 5-2330-378-14&P

4-47. BRAKEADJUSTMENT.

ThisTaskCovers:

Adjustment

InitialSetup:

ToolsrrestEquipment:

EquipmentConditions:

- Toolkit,generalmechanic's:automotive

- Front and rear semitrailer wheels chocked (para 2-10).

(Item 7, Appendix B)

- Semitrailer coupled to truck tractor (para 2-8).

ADJUSTMENT

WARNING

Truck tractor and semitrailer

must be on a flat surface or level ground, with wheels

chocked prior to adjusting brakes.

Failure to chock wheels and park on level ground

could result in Injury to personnel.

NOTE

•

There are six sets of brakes on the semitrailer.

This procedure

is for adjusting one

setofbrakes.

Repeat the procedure forthe otherfive.

Brake adjustment is the same

for spring brakes and service brakes except that spring brakes must be released to

allow adjustment.

•

Brakes must beat ambient temperature

prior to adjustment.

•

To release slack adjuster and camshaft, apply airto brake chambers.

Donotapply

brakes.

a.

Placejack

underend of axle on brake being adjusted.

Release parking brake. Raise axle on brake being

adjusted

until wheels clear the ground.

b.

Rotate adjusting nut (1) on slack adjuster (2)

clockwise

until brake linings are snug against

brakedrum.

C.

Turn adjusting nut (1) counterclockwise

1/4 turn

(approximately

70 ft-lb [95 N-ml of effort is required

to override

automatic slack adjusting mechanism).

2

4-104