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Engine Maintenance (Rev. 04/03)
58
TK 3.95 ENGINE
Operation of the TK 3.95 engine is controlled by the opera-
tion of the fuel solenoid and the throttle (high speed) sole-
noid. The fuel solenoid consists of a spring loaded plunger
and electro-magnetic coil. When the engine is OFF, spring
tension on the plunger maintains the plunger’s “out” posi-
tion. When pushed out, this causes the governor linkage to
move the injection pump rack to the “Fuel Off” position.
When the fuel solenoid is energized, current is applied to
the coil creating an electro-magnetic field, which pulls the
plunger in. When the solenoid is in the “pulled-in” position,
the plunger releases tension on the governor linkage. The
governor linkage then moves the fuel injector rack, thus
controlling the fuel flow and placing it in the “Fuel On”
position.
Adjustments made to the throttle (high) speed solenoid
change governor spring tension which in turn adjust speed
settings.
Fuel Solenoid Diagnostic and
Replacement
•
Refer to the Interface Board diagnostic procedures in
the Thermoguard µp-T Controller Operation and Diag-
nosis Manual TK 41087 sections 3 and 4.
Fuel Solenoid Components
Summary of Contents for 088669
Page 4: ......
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Page 12: ...Safety Precautions Rev 04 03 iv PUB126...
Page 13: ...Safety Precautions Rev 04 03 v aea105...
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Page 28: ...Unit Description Rev 04 03 14 Rear View Curbside RD II SR Evaporator aea105...
Page 32: ...Unit Description Rev 04 03 18 Power Receptacle Box RD II SR 50 aea102...
Page 76: ...Refrigeration Maintenance Rev 04 03 62...
Page 77: ...Refrigeration Maintenance Rev 04 03 63...
Page 81: ...Refrigeration Maintenance Rev 04 03 67...
Page 103: ...89 Hilliard Clutch Maintenance Clutch Assembly...
Page 106: ...Hilliard Clutch Maintenance Rev 04 03 92 12 Install retaining ring Clutch Torque Values...
Page 125: ...111 Cool Cycle RD II SR with TherMax Heating...
Page 126: ...112 Condenser Cycle RD II SR with TherMax Heating...
Page 127: ...113 Heat and Defrost Cycle RD II SR with TherMax Heating...
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