ROTATING GP-PUMP 9T7764 - Caterpillar

Introduction
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 problemsNormally, 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.Troubleshooting Problem List
The Engine Crankshaft Will Not Turn When The Start Switch Is On.
The Engine Will Not Start.
The Engine Is Misfiring Or The Engine Is Running Rough.
The Engine Stalls At Low RPM.
The Engine Has Sudden Changes In Engine RPM.
The Dashpot Governor Corrects The Speed Of The Engine Slowly. The Engine Changes Speeds Constantly.
The Engine Does Not Have Enough Power.
The Engine Has Too Much Vibration.
The Engine Has A Loud Combustion Noise (Knock).
The Engine Has a Valve Train Noise (Clicking).
Oil Is In The Cooling System.
Mechanical Noise (Knock) Is In The Engine.
Fuel Consumption Is Too High.
A Loud Noise Is In The Valve Train.
Too Much Valve Lash Is Present.
The Valve Rotocoil Or The Spring Lock Is Free.
Oil Is At The Exhaust.
Little Valve Lash Or No Valve Lash Is Present.
The Engine Has Early Wear.
Coolant Is In The Lubrication Oil.
Too Much Black Smoke Or Gray Smoke Is Present.
Too Much White Smoke Or Blue Smoke Is Present.
The Engine Has Low Oil Pressure.
The Engine Uses Too Much Lubrication Oil.
The Engine Coolant Is Too Hot.
The Exhaust Temperature Is Too High.
The Starting Motor Does Not Turn.
The Alternator Provides No Charge.
The Alternator Charge Rate Is Low. The Alternator Charge Rate Is Not Regular.
The Alternator Charge Rate Is Too High.
The Alternator Has Noise.
The Rack Solenoid Does Not Stop The Engine.Troubleshooting Problems
Problem 1
The Engine Crankshaft Will Not Turn When The Start Switch Is On.Probable Cause
Low Output Of The BatteryRefer to "Problem 27".
Faulty Wires Or Faulty SwitchesRefer to "Problem 27".
Faulty Starter Motor SolenoidRefer to "Problem 27".
Problem With The Starting MotorRefer to "Problem 27".
An Internal Problem Prevents The Turning Of The Engine Crankshaft.If the crankshaft cannot be turned after disconnecting the driven equipment, inspect the cylinders for fluid while the crankshaft is being turned. If fluid in the cylinders is not the problem, the engine must be disassembled. After disassembling the engine, inspect the engine for other internal problems. Possible internal problems include the following conditions:
bearing seizure
piston seizure
valve and piston contactProblem 2
The Engine Will Not Start.Probable Cause
A Slow Turning Starter MotorRefer to "Problem 27" and refer to "Problem 28".
Dirty Fuel FilterInstall a new fuel filter.
Dirty Fuel Line Or Broken Fuel LineClean the fuel lines or install new fuel lines, as required.
Fuel Transfer PumpAt the starting rpm, the minimum fuel pressure from the fuel transfer pump must be 35 kPa (5 psi). Change the