Thermo King MD-MT, Operator'S Manual

Page: 137 / 192

137
Mechanical Diagnosis
Condition Possible Cause Remedy
Unit switched On—indicator
lights do not come on Batteries discharged Charge or replace batteries
Reset switch tripped Check engine oil, coolant level, and
CYCLE-SENTRY system (optional).
Push in reset switch button
Corroded battery connections Clean and tighten
Circuit breaker tripping Check for short circuit in unit wiring
Indicator lights come on but
engine does not crank Batteries discharged Replace or recharge battery
Diesel/Electric switch in Electric
position Place switch in Diesel position
Defective Preheat-Start switch Replace switch
Defective starter solenoid Replace solenoid
Start relay defective Replace relay
Corroded battery connections Clean and tighten
Defective starter Repair starter
Water in cylinders Check for hydrostatic lock. Remove
glow plugs and turn engine slowly
Starter motor turns but engine
does not crank Starter clutch defective Replace
Engine cranks but fails to start Fuel solenoid not energized Check 8D circuit, fuel solenoid
timer, and relay
Fuel solenoid defective or stuck Replace
Injection pump defective Replace pump
Glow plugs defective Replace defective glow plugs
No fuel or wrong fuel Fill with proper fuel
Fuel pump defective Replace pump
Air in fuel system Bleed air
Compression low Overhaul engine
Injection nozzles defective Repair or replace nozzles
Incorrect timing Adjusting timing
Air cleaner clogged Clean air cleaner
Defective high pressure cutout Replace high pressure cutout switch
Defective electric fuel pump Check fuel pump