TM-5-3805-254-14-P-2

TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW, IHC MODEL F-5070 (CCE)

TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, GENERAL SUPPORT AND DEPT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS INFORMATION AND SUPPLEMENTAL MAINTENANCE INSTRUCTIONS)

JUNE 1980

TM-5-3805-254-14-P-2 - Page 206 of 894

MOTOR TRUCK SERVICE MANUAL

BRAKES-AIR

Recommended Grease

A high temperature water-proof grease, IH 251 HE.P.

grease or equivalent to NLGI

#

2 multipurpose grease is

recommended for lubricating the brake actuating system.

The following greases meet all of these recommendations:

Texaco Thermotex EP f1

Shell Darina f1

Marathon 528 H.D.

Sunaplex t1 EP

Amdex f1 EP

Philube B t1

NOTE:

Vehicles operating in extremely cold weather (below -400F) may require a grease conforming to MIL-G-25013C.

Replacing Air Chamber Diaphragm

:

The air chamber diaphragm and push rod boot may be serviced in either of two

ways-removing the complete chamber from the brake, or removing the clamp ring and pressure half only and leaving the

non-pressure half attached to the brake.

The latter method is recommended but, since the wedge assembly is left inside

the tube, certain precautions must be taken to prevent the wedge assembly from being pulled out of position and

becoming misaligned with the plungers. The proper procedure is given under Servicing Air Chamber Diaphragm

TROUBLE SHOOTING GUIDE

If brakes are poor or do not apply-

check system pressure at source and at brakes possible restriction or leak in brake

lines, valves, etc.

brakes out of adjustment

leaking diaphragm or wheel cylinder cup.

Uneven braking or lining wear-

ruptured diaphragm

wedge rod out of push rod socket

rollers and cage out of plunger

socket

corroded or frozen plungers brakes out of adjustment grease on lining glazed lining

shoes installed backward

combination linings.

Automatic Adjusters not working-

adjusting pawl installed backward

pawl spring collapsed or missing

bolt frozen in

adjusting sleeve

detent damaged and allowing bolt to rotate with sleeve

adjusting plunger in wrong position (should be at

leading end of shoe) double lip seals not installed correctly.

202