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Engine Maintenance
100
Thermo King recommends that any major
injection pump or nozzle repairs be done by a
quality diesel injection service specialty shop. The
investment in equipment and facilities to service
these components is quite high. Therefore, this
equipment is not found in most repair shops.
The following procedures can be done under field
conditions.
•
Bleeding air from the fuel system
•
Maintenance involving the fuel tank and filter
system
•
Speed and governor adjustments
•
Electric fuel pump replacement or repair (9.5
to 11.5 psi [66 to 79 kPa] pump with diesel
filter)
•
Injection line replacement
•
Pump timing
•
Nozzle spray pattern testing and adjustment
•
Minor rebuilding of nozzles.
Bleeding the Fuel System
If the engine runs out of fuel, if repairs are made
to the fuel system, or if air gets into the system for
any other reason, the air must be bled out of the
fuel system.
NOTE: MAKE SURE to keep the fuel tank vent
open. If the vent becomes clogged, a partial
vacuum develops in the tank, this may cause air
to enter the system.
Proceed as follows:
1. Remove the CYCLE-SENTRY module from
the option board to prevent the Auto Start
system from preheating and cranking the
engine.
2. Loosen the air bleed screw in the inlet fuel
fitting on the injection pump.
3. Energize the electric fuel pump by placing the
On/Off switches in the On position and
pressing the
O
N
key. Tighten the air bleed
screw and press the
O
FF
key when a clear flow
of fuel appears.
NOTE: For the initial start-up, crack the air
bleed screw at the injection pump and bleed
fuel until a clear flow of fuel is noted.
4. Loosen the injector lines at the injection
nozzles.
5. Crank the engine until fuel appears at the
nozzles. Tighten the injector lines, replace the
CYCLE-SENTRY module and start the
engine.
NOTE: Fuel will not appear at the nozzles by
merely running the electric pump. The
engine must be cranked.
Water in the Fuel System
Water in the fuel system can damage the injection
pump and nozzles. This damage will subsequently
cause more expensive damage to the engine. A
large accumulation of water in the bottom of the
fuel tank will stop a diesel engine. Water should
be drained off periodically to avoid breakdowns.
This should be done after the tank has set idle for
an hour. Do not steam clean fuel tank caps.
Fuel Filter Replacement
1. Remove the filter and discard it.
2. Lubricate the rubber ring on the new filter
with fuel.
3. Install the filter and tighten it until the filter is
slightly loose (rubber ring not making
contact).
4. Bleed the air from the filter by operating the
electric fuel pump until fuel bubbles appear at
the top of the filter.
5. Tighten the filter until the rubber ring makes
contact, and then tighten it 1/2 turn more.
Summary of Contents for 914970
Page 3: ...3...
Page 10: ...Table of Contents 10...
Page 40: ...Operating Instructions 40...
Page 82: ...Electronic Controls 82...
Page 92: ...Electrical Maintenance 92...
Page 124: ...Refrigeration Maintenance 124...
Page 140: ...Hilliard Clutch Maintenance 140...
Page 160: ...Refrigeration Diagrams 160...
Page 163: ...Index 163 W wiring 85 wiring diagrams 165...
Page 164: ...Index 164...
Page 166: ...Wiring and Schematic Diagrams Index 166...
Page 167: ...167 Cab Control RD Wiring Diagram...
Page 168: ...168 RD w o Thermostat Cab Control Schematic...
Page 169: ...169 RD Cab Box Wiring Diagram...
Page 170: ...170 RD Cab Control w Thermostat Schematic Diagram...
Page 171: ...171 RD 50 STD 3 Phase Wiring Diagram Page 1 of 2...
Page 172: ...172 RD 50 STD 3 Phase Wiring Diagram Page 2 of 2...
Page 173: ...173 RD 50 STD 3 Phase Schematic Diagram Page 1 of 2...
Page 174: ...174 RD 50 STD 3 Phase Schematic Diagram Page 2 of 2...
Page 175: ...175 RD 30 STD Wiring Diagram Page 1 of 2...
Page 176: ...176 RD 30 STD Wiring Diagram Page 2 of 2...
Page 177: ...177 RD 30 STD Schematic Diagram Page 1 of 2...
Page 178: ...178 RD 30 STD Schematic Diagram Page 2 of 2...
Page 179: ...179 RD 30 C S Wiring Diagram Page 1 of 2...
Page 180: ...180 RD 30 C S Wiring Diagram Page 2 of 2...
Page 181: ...181 RD w CYCLE SENTRY Schematic Diagram Page 1 of 2...
Page 182: ...182 RD w CYCLE SENTRY Schematic Diagram Page 2 of 2...
Page 183: ...183 RD 50 C S 3 Phase Wiring Diagram Page 1 of 2...
Page 184: ...184 RD 50 C S 3 Phase Wiring Diagram Page 2 of 2...
Page 185: ...185 RD w CYCLE SENTRY Schematic Diagram Page 1 of 2...
Page 186: ...186 RD w CYCLE SENTRY Schematic Diagram Page 2 of 2...