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 563 of 894
TRUCK SERVICE MANUAL
FUEL SYSTEM
Field Troubles
Trouble
1.
Low frequency pulsation from
turbocharger
2.
Intake
manifold
pressure
fluctuating
sharply.
]
3.
Excessive
vibration
In
turbocharger
4.
Lubricating
oil
in
intake
manifold or exhaust stack.
5.
Oily or dirty appearance in
compressor wheel flow passage.
6.
Oily appearance on bearing
housing or on V Bands
7.
Turbocharger speed and
intake manifold pressure low.
Exhaust
temperature high and excessive
smoke.
Probable Cause
Compressor surging due to
restricted air flow.
Turbocharger mis-matched to
engine air requirement.
Rotor rubbing Intermittently.
Turbocharger surging.
Rotor out of balance.
Rotor rubbing.
Excessive oil seal clearance In
turbocharger.
Restricted crankcase breather.
Restriction in air intake.
Oil drain line angle in excess of 30
deg.
from vertical.
Excessive blow-by.
Restriction of oil drain.
Oil pull-over from oil bath air
cleaner.
Loose oil inlet or drain fitting
Accumulation of dirt on compressor
wheel
Oil pull-over from air cleaner.
Leaks in Intake or exhaust piping.
Air cleaner too small or restricted.
Remedy
Check intake and exhaust systems
and remove restrictions.
Remove turbocharger and make
necessary repairs or replace with new
turbocharger.
Remove turbocharger and make
necessary repairs or replace with new
turbocharger.
Remove restriction In Intake or
exhaust system.
Remove and rebalance or replace
rotor assembly.
Remove turbocharger and make
necessary repairs or replace with new
turbocharger
Remove turbocharger and make
necessary repairs or replace with new
turbocharger.
Clean or replace breather.
Check air intake piping for restriction
Turn bearing housing to proper angle.
Check for worn piston ring seals.
Check oil drain lines and fittings;
replace if necessary.
Check oil level in cleaner and size of
cleaner.
Check for possible entry of
water In air cleaner.
Use Teflon tape-on fitting.
Tighten to
proper torque.
Remove and clean
Check air cleaner for oil level and size
of cleaner.
Repair leaks.
Clean or replace as required.
558
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