PUMP GP-LUBRICATION 4819863 - Caterpillar

The Engine Crankshaft Turns Too Slowly
Probable Causes
Low battery voltage
Faulty cable or connection (battery to starting motor)
Incorrect lubrication oil
Faulty starting motor
Extra load
Internal mechanical problemRecommended Repairs
Low Battery Voltage
Check battery voltage. If the battery voltage is less than 12 volts for a 12 volt system, or 24 volts for a 24 volt system, put a charge on the battery. If the battery will not keep a charge, load test the battery. Refer to Systems Operation, Testing And Adjusting, "Electrical System" and Special Instruction, SEHS7633, "Battery Test Procedure".Faulty Cable or Connection
With the ignition switch in the "START" position, check the voltage at the connection of the battery cable to the starting motor. If there is no voltage, or if the voltage is low at this connection and there is good voltage at the battery, check for a faulty battery cable. Also check all connections between the battery and the starting motor.Incorrect Lubrication Oil
Ensure that the proper lubrication oil is installed. Use the recommended lubrication viscosities that are listed in the Operation And Maintenance Manual.Faulty Starting Motor
Remove the starting motor and test the starting motor. Repair the starting motor or install a new starting motor.Extra Load
Check the driveline for free movement. Disconnect the PTO drives or remove the PTO drives, if equipped. Remove engine accessories and inspect engine accessories that put an additional load on the engine. The following components should be inspected:
Air compressor
Power steering pump
Engine oil pump
Hydraulic oil pumpInternal Mechanical Problem
If the engine cranks too slowly and the driven equipment has been disconnected, the engine must be disassembled. After the engine is disassembled, inspect the engine for other internal problems. Possible internal problems include the following conditions:
Damaged internal parts
Binding in the valve mechanism
Bearing seizure
Piston seizure
Valve and piston contactThe Engine Crankshaft Turns Freely
Note: Use the following information as a guide to help solve a hard starting problem when the engine runs properly after starting.Probable Causes
Low fuel level
Low quality fuel
Fuel waxing
Air in fuel or no fuel
Low fuel pressure
Improper starting procedure
Faulty fuel shutoff solenoid
Incorrect fuel Setting
Incorrect fuel injection timing
Faulty fuel injector nozzles
Faulty fuel ratio control
Faulty fuel injection pump
Improper camshaft timing
Low cylinder compressionRecommended Repairs
Low Fuel Level
Visually check the fuel level. Do not rely on the fuel gauge. The lack of exhaust smoke or the lack of intermittent firing during cranking typically indicates insufficient fuel.Low Quality Fuel
Check for water in the fuel. If water is in the fuel, drain the tank and refill with a good quality diesel fuel. Refer to Supplement, SEBU6385, "Caterpillar On-Highway Diesel Truck Engine Fluids Recommendations" for more information.Fuel Waxing
For cold outside temperatures, check for the presence of fuel waxing. Refer to Troubleshooting, "Fuel Quality" for details. Check for proper operation of ether starting system and/or air inlet heater (if equipped).Air in Fuel or No Fuel
Refer to Troubleshooting, "Air In Fuel". If fuel is not present in the sight gauge in the return line, refer to Systems Operation, Testing and Adjusting, "3406C Diesel Truck Engine".Low Fuel Pressure
Replace the primary fuel filter and the secondary fuel filter. Check the fuel lines for blockage or