Ford Tractor Repair Manual 1120, 1220, 1320, 1520, 1720, 1920, 2120

LOCATING A FAULTY NOZZLE

If rough or uneven engine operation, or misfiring indicates a faulty injector nozzle, the defective unit can usually be located as follows:

With engine running at the speed where malfunction is most noticeable, loosen compression nut on high pressure line for each injector in turn, allowing fuel to escape at the nut rather than enter the cylinder. If engine operation is not affected when injector line is loosened, that is the cylinder that is misfiring.

If a faulty injector is found and considerable time has elapsed since injectors have been serviced, it is recommended that all injectors be removed and serviced, or that new or reconditioned units be installed. Refer to the following paragraphs 62 through 66 for removal and test procedures.

• Detailed illustrations and exploded views
• Troubleshooting sections covering most models
• Brakes
• Cooling system
• Differential
• Electrical system
• Engine
• Final drive
• Axles
• Hydraulics
• Transmission
• Condensed service data information
• Detailed index

• Accurate information in a concise, easy-to-use format
• Durable, coated paper stands up to messy shop jobs