Cat C1.7 Troubleshooting
| Engine Model: Caterpillar C1.7 |
| Engine Type: 4-cycle inline 3-cylinder direct injection liquid-cooled diesel |
| Total Displacement: 104 cu.in (1.7 L) |
| Rated Engine Power: 28-48 Hp (21-36 kW) at 2500 rpm |
| Aspiration Type: Naturally aspirated |
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| Engine difficult to start or will not start |
Fuel filter plugged - Replace the filter element.
Air in fuel tank - Bleed fuel tank.
Dirty or damaged injection nozzles - Service or change injection nozzles.
Fuel injection pump malfunction - Change pump or rebuild it.
Valve timing is incorrect - Use correct valve timing adjustment.
Plugged fuel pipes - Clean or change fuel pipes.
Injection timing is incorrect - Adjust as recommended.
Excessive wear of piston rings and cylinder - Replace defective parts.
| Diesel starts but then stops |
Clogged fuel filter - Change filter element.
Fuel injection pump is defective - Rebuild or replace pump.
Air filter is dirty - Change air filter element.
Nozzle opening pressure is not adjusted - Adjust as required.
| Engine shuts off suddenly during operation |
Timing of fuel injection pump is incorrect - Adjust as recommended.
Fuel filter element is dirty - Service the filter.
Engine is not fully warmed up - Warm up to required temperature.
Defective or stuck injection nozzles - Repair or change injection nozzles.
| Engine stops while idling |
Low idle speed setting is not correct - Correct low idle adjustment.
Valve clearance is out of adjustment - Correct valve clearance.
Fuel injection pump is not working correctly - Replacement or repair required.
Clogged or burnt injection nozzle - Change fuel injection nozzles.
Restricted fuel lines or hoses - Clean fuel system lines and hoses.
Clogged air filter element - Clean or change.
Cylinder-head gasket is leaking - Install a new gasket.
Injection timing is improper - Adjust as recommended.
Fuel injection pump is faulty - Repair or change injection pump.
Any of moving engine parts is worn - Change or repair damaged parts.
Faulty radiator cap or dirty radiator fins - Clean radiator or install new cap.
Insufficient coolant fluid - Add coolant fluid and inspect the cooling system for leaks.
Damaged or worn fan belt - Replace as required.
Lack of engine oil - Check oil level and add oil as required.
Cylinder-head gasket is broken - Install a new gasket.
Injection timing is wrong - Use correct injection timing adjustment.
Insufficient engine oil - Add oil as required.
Oil pump is worn or damaged - Replace as required.
Engine oil filter is plugged - Change or clean engine oil filter element.
Stuck or defective relief valve - Replace or clean relief valve.
Crankshaft bearing clearance is excessive - Test and repair or replace worn parts.
Crankpin bearing clearance is excessive - Inspect and replace or repair faulty components.
| Excessive engine oil consumption |
Oil leaks: Defective seals or gaskets - Install new components.
Crankcase oil too light - Fill up with the proper oil viscosity.
Worn or stuck piston rings - Have piston rings replaced.
Worn valve stems and valve guides - Change the valves.
Cylinder liners or pistons are damaged - Inspect liners and pistons, replace as necessary.
Engine is not preheated - Warm up to required temperature.
Engine oil level is low - Need to add engine oil.
Fuel injection pump timing is not adjusted - Set up as recommended.
Piston wear or scoring - Replace the pistons.
Connecting rod misalignment or failure - Align or change connecting rod.
Low battery output voltage - Low battery charging, charge as required.
Battery is draining quickly - Service or change the battery.
Disconnected wiring or bad battery terminals - Check wire connections and change or service terminals.
Battery is drained or worn - Recharge or replace battery.
Disconnected or improperly connected wiring harness - Inspect battery wiring harness and connect as required.
Low battery capacity - Battery is drained, charge it.
Starter motor is damaged - Replace or repair starter.
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