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 137 of 894
BREAKS-AIR
TRUCK SERVICE MANUAL
3,000 Miles:
Service compressor air strainer.
Remove and
wash all parts including curled hair in ’leaning solvent.
Saturate curled hair with clean engine oil and squeeze
dry before replacing it in the strainer.
Check compressor mounting and drive for
alignment, belt tension, etc.
Adjust if necessary.
10, 000 Miles:
If compressor is self lubricated type, the oil should
be drained and the compressor crankcase flushed and
refilled with clean engine oil.
35,000 Miles:
Remove compressor discharge valve cap nuts and
check for presence of excessive carbon deposits.
Also,
check the discharge line for carbon.
If excessive carbon
is found in either check, the cylinder head or discharge
line should be cleaned or replaced.
If compressor is self lubricated type, service
crankcase breather.
Clean and wash breather in
cleaning solvent.
If the compressor is lubricated from the engine, clean oil
supply line to compressor. Also clean oil return line to
engine crankcase if chassis is so equipped.
100,000 Miles:
Depending
upon
operating
conditions
and
experience, disassemble compressor, clean and inspect
all parts thoroughly.
Repair or replace all worn or
damaged
parts.
TROUBLE SHOOTING
Compressor Fails to Maintain Adequate pressure in the
Air Brake System
1. Dirty intake strainer.
2. Excessive carbon in compressor cylinder head
or discharge line.
3. Discharge valves leaking.
4. Excessive wear.
5. Drive belt slipping.
6. Inlet valves stuck open.
7. Excessive leakage of inlet valves.
Noisy Operation
1. Loose drive pulley.
2. Excessive carbon in cylinder head or damaged
line.
3. Worn or burnout bearings.
4. Excessive wear.
Compressor Passes Excessive Oil
1. Excessive wear.
2. Dirty air strainer.
3. Excessive oil pressure.
4. Oil return line or passage to engine compressor
crankcase flooded.
5. Oil seal ring in end cover excessively worn.
6. Back pressure from engine crankcase.
7. Piston rings improperly installed.
Compressor Does Not Unload
1. Defective unloading piston grommet.
2. Unloading cavity plugged with carbon.
3. Unloading mechanism binding or stuck.
135
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