Thermo King SB-190 30, Manual

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Mechanical Diagnosis (Rev. 02/03)
92
Engine does not develop full
power Air intake system clogged Clean air intake system
Fuel tank vent clogged Unclog vent
Clogged fuel tank or fuel lines Clean fuel tank and fuel lines
Speed adjustment wrong Adjust speed
Insufficient fuel volume leaving filter Check for dirty filter or air in system
Air cleaner clogged Replace air filter
Delivery of fuel pump insufficient Repair pump
Injection pump timing off Adjusting timing
Nozzles defective Repair or replace nozzles
Compression low or unbalanced Overhaul engine
Worn injection pump plungers,
delivery valve defective, injection
rate too low, gum formations Repair or replace pump
Engine speed too high Misadjusted high speed solenoid Adjust high speed solenoid
Defective injection pump Repair injection pump
Engine fails to stop when unit is
OFF Fuel solenoid defective Replace
Injection pump defective Replace pump
Engine knocks heavily Air in system Bleed fuel system
Injection pump not timed Retime injection pump
Wrong fuel Change fuel
Compression too low Overhaul engine
Injection nozzles fouled or opening
pressure too low Clean, repair or replace injection
nozzles
Delivery valve spring broken Replace spring or repair injection
pump
Valve out of adjustment Adjust valves
Fuel return line plugged Remove return line restriction
Rod or main bearing worn Replace rod or main bearings
CONDITION POSSIBLE CAUSE REMEDY