Troubleshooting can be difficult. The following pages contain a list of possible problems. In order to make a repair to a problem, refer to the cause and the correction of the problem.
The list on the following pages will provide the following information:
- Known problems
- Probable causes of known problems
- Repairs in order to correct known problems
Normally, additional repair work is needed beyond the recommendation in the list.
Remember that a problem is not normally caused by only one part. The problem's cause can be related to problems with other parts. This list does not include all possible problems and corrections. The service technician must find the problem and the problem's source. After the problem's source is determined, the service technician can make the necessary repairs.
- The Shutoff Solenoid Fails To Stop The Engine.
- The Contactor Switch For Water Temperature Does Not Activate The Shutoff Solenoid.
- The Contactor Switch For Water Temperature Activates At Wrong Temperature.
- The Contactor Switch For The Oil Pressure Does Not Activate The Shutoff Solenoid.
- The Electrical Gauges Give Wrong Readings.
- There Is No Output From The Governor.
- The Engine Has Slow Response To A Change In Speed Setting Or Load.
- The Engine Speed Does Not Have Stability.
- The Engine Will Not Drive A Full Load.
- The Clutch Will Not Engage Or The Lever Moves To The Released Position.
- The Clutch Shaft Has Too Much End Play.
- The Clutch Bearing Has Short Life.
The Shutoff Solenoid Fails To Stop The Engine.
- There Is A Poor Connection.
Check connections and wiring.
- The Adjustment For The Plunger Shaft Is Incorrect.
Make adjustments to the plunger shaft.
- The Plunger Is Incorrect In The Shutoff Solenoid.
Install the correct plunger shaft.
- There Is Not Enough Plunger Travel.
Make an adjustment to the plunger shaft. Replace the solenoid if it is necessary.
The Contactor Switch For Water Temperature Does Not Activate The Shutoff Solenoid.
- There Is Low Water Level In The Cooling System.
Fill the cooling system.
- There Is A Poor Connection.
Check connections and wiring.
- The Water Temperature Contactor Switch Has Failed.
Check the water temperature contactor switch.
- The Setting Of Switch Is Incorrect.
Make a test of temperature setting. Install a new contactor switch with the correct setting if it is necessary. See Specifications.
- There Is A Failure Of The Shutoff Solenoid.
Check the shutoff solenoid.
The Contactor Switch For Oil Pressure Does Not Activate The Shutoff Solenoid.
- There Is A Poor Connection.
Check the connections and wiring.
- The Setting Of The Switch Is Incorrect.
Make a test of the temperature setting. Install a new contactor switch with the correct setting if it is necessary. See Specifications.
The Electrical Gauge Gives The Wrong Reading.
- There Is A Poor Connection.
Check the connections and wiring.
- The Sending Unit Has Failed.
Check the sending unit. Install a new sending unit if it is necessary.
- The Resistor In A 32 Volt System Has Failed.
Install a new resistor.
- The Sending Unit Is Incorrect.
Install the correct sending unit.
- The Gauge Is Incorrect.
Install the correct gauge.
There Is No Output From The Governor.
- The Engine Cranking Speed Is Too Slow.
Make reference to Troubleshooting in Engine Testing And Adjusting.
- The Lubrication Oil Is Old.
Drain the governor and clean the governor. Fill the governor with new oil of the correct weight. Bleed any trapped air from the oil passages that are in the governor.
- There Is No Governor Oil Pressure.
Inspect the governor's oil pressure relief valve. Replace the valve if it is necessary. Inspect the pump's check valves and valve seats. Replace the valve if it is necessary. Inspect the governor's oil pump. Repair the pump if it is necessary.
- The Governor Drive Has Failed.
Repair the governor drive.
- The Fuel Control Linkage Has Failed.
Inspect the linkage and adjust the linkage. Repair the fuel control linkage if it is necessary.
The Engine Has A Slow Response To A Change In Speed Setting Or Load.
- The Compensation Adjustments Are Incorrect.
Adjust the needle valve and the compensation pointer.
- The Engine Is Overloaded.
Decrease the engine load.
- Low Governor Oil Pressure
Drain the governor and clean the governor. Inspect the governor's oil pressure relief valve. Replace the valve if it is necessary. Inspect the pump's check valves and valve seats. Replace the valve if it is necessary. Inspect the governor's oil pump. Repair the pump if it is necessary. Fill the governor with new oil of the correct weight. Bleed any air from the oil passages that are in the governor.
- Problem With Engine Fuel System
Make reference to Fuel Systems in Engine Testing And Adjusting.
The Engine Speed Does Not Have Stability.
- The Compensation Adjustments Are Incorrect.
Adjust the needle valve and the compensation pointer.
- There Is Dirty Oil In The Governor.
Drain oil. Clean the governor and fill the governor with the correct weight of oil.
- The Oil Level In The Governor Is Low.
Add oil to the correct level. Check for leaks.
- There Is Air In The Governor Oil.
Drain oil. Refill with correct weight of oil.
- There Is Too Much Play In The Linkage From The Governor To The Engine.
Adjust the linkage. Repair the linkage or replace the linkage.
- The Linkage From The Governor To The Engine Does Not Move Freely.
Make reference to the Governor Alignment Procedure in Specifications.
- The Governor Parts Are Worn.
Disassemble the governor and inspect the following components: pilot valve, power piston, flyweight pins, pin bearings, flyweight toes, flyweight head thrust bearings and centering bearing Operation of all parts should be smooth and free. Repair the parts or replace the parts as it is necessary.
- The Governor Oil Pressure Is Low.
Drain the governor and clean the governor. Inspect the governor's oil pressure relief valve. Replace the valve if it is necessary. Inspect the pump's check valves and valve seats. Replace the valve if it is necessary. Inspect the governor's oil pump. Repair the pump if it is necessary. Fill the governor with new oil of the correct weight. Bleed any air from the oil passages that are in the governor.
- The Power Piston Is Sticking.
Check alignment of piston, power link and power lever. Check for end play of terminal shaft.
- The Voltage Regulator Does Not Operate Correctly.
Replace the alternator voltage regulator.
- Engine Misfiring
Make reference to Fuel Systems in Engine Testing And Adjusting.
The Engine Will Not Drive A Full Load.
- The Fuel Control Linkage Does Not Move Freely.
Make reference to the Governor Alignment Procedure in the Specification.
- There Is A Problem With The Fuel System.
Make reference to Fuel Systems in Engine Testing And Adjusting.
- The Governor Oil Pressure Is Low.
Drain the governor and clean the governor. Inspect the governor's oil pressure relief valve. Replace the valve if it is necessary. Inspect the pump's check valves and valve seats. Replace the valve if it is necessary. Inspect the governor's oil pump. Repair the pump if it is necessary. Fill the governor with new oil of the correct weight. Bleed any air from the oil passages that are in the governor.
- The Voltage Regulator Does Not Operate Correctly.
Replace the alternator voltage regulator.
The Clutch Will Not Engage Or The Lever Moves To The Released Position.
- The Adjustment Is Incorrect.
Adjust the lever pull for the clutch engagement.
- Alignment Of Flywheel And Flywheel Housing Mounting Face And Bores
Check and adjust the alignment.
- Overload On Clutch
Reduce load or reduce engine speed while you engage the clutch.
The Clutch Shaft Has Too Much End Play.
- The Bearing Is Worn Or The Adjustment Is Incorrect.
Replace the shaft bearing or make adjustment to the shaft bearing.
The Clutch Bearing Has A Short Life.
- Too Much Bearing Clearance
Replace the shaft bearing or make adjustment to the shaft bearing.
- The Side Load Is Too High.
Make a reduction to the side load.