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 564 of 894
TRUCK SERVICE MANUAL
FUEL SYSTEM
Field Troubles (Continued)
Trouble
8.
Turbocharger speed slightly
high, exhaust smoking.
Exhaust
temperature high.
9.
Turbocharger
speed
high,
intake manifold pressure correct.
10.
Drooping torque
characteristic.
11.
Loss of engine power, smoky
exhaust.
Exhaust temperature high.
12.
Low turbocharger speed, low
power, clean exhaust.
Probable Cause
Insufficient fuel supply from fuel
pump.
Back pressure on turbocharger
exhaust too high.
Turbocharger rotor rubbing.
Engine receiving insufficient air due
to restricted air inlet.
Dirty air cleaner.
Fuel pump delivering too much fuel
to engine.
Leaking exhaust valves.
High-altitude operation.
Improper fuel pump setting.
Turbocharger rotor rubbing.
Dirty compressor wheel.
Air intake restricted.
Insufficient fuel supply to engine.
Remedy
Check fuel rate and reset pump.
Reduce restriction in exhaust stack.
Remove turbocharger and make
necessary repairs or replace with new
turbocharger.
Remove restriction.
Clean air cleaner.
Reset fuel pump.
Reset or repair bad valves.
Derate engine fbr continuous duty at
this altitude.
Reset fuel pump.
Remove turbocharger and make
necessary repairs or replace with new
turbocharger.
Clean compressor wheel.
Remove restriction.
Reset fuel pump.
559
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