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 175 of 894

TRUCK SERVICE MANUAL

PROBLEM

POSSIBLE CAUSE

REMEDY

Excessive Use

of Alcohol

Leaky compressor unloaders

Replace compressor unload-

(supercharge and turbochargers

induction only).

Leaky

unloaders can cause alcohol to

be "blown" into the engine in-

take.

Evaporator is subjected to ex-

Relocate alcohol evapora-

cessive temperature (greater

tor.

than 490 C, 1200 F).

Check valve leaking or inop-

Replace necessary parts or

erative (Engine Air Cleaner

complete check valve.

Inductiononly).

Excessive system leakage

Check system leakage.

(causing compressor to be in

Leakage should not be

loaded compressing air cycle

greater than 2 psi in one

in excess of normal).

minute for single vehicles

(with brakes released).

Choke fitting, B.W.

part No.

Install choke fitting (B.W.

245103, not used (supercharged

245103) at compressor in-

and turbocharged induction

let.

only).

Clogged air strainer (will

Clean or replace air

cause excessive intake vacuum).

strainer element.

Deposit of Residue

Wrong alcohol being used.

Use only pure methanol al-

in Valves from

cohol, Bendix-Westinghouse

Alcohol

"

Air Guard" or equivalent.

173

BRAKES-AIR