Fuel System - Operation and Tests/In-line Injection Pump CTM3274 (01JUL99) 220-19 Saran Liter Engines 060799 PN=358 DIAGNOSE FUEL SUPPLY PUMP MALFUNCTIONS—IN-LINE INJECTION PUMP IMPORTANT: Visually inspect the fuel inlet fitting and pump filter for possible plugging before disassembling to determine cause of malfunction. Symptom Problem Solution Low Supply Pump Output Restriction at fuel inlet fitting. Thoroughly clean fuel tank, lines, Pressure or Pump Not filters, and inlet fitting. Functioning Correctly Hand primer not screwed down Advise customer to tighten hand tight, allowing dirt to enter hand primer after use. primer plunger chamber.
Worn or pitted valves caused by Replace valves or complete pump foreign material lodging in valve. depending on service part availability. Missing or broken spring(s). Replace spring(s) or complete pump depending on service part availability. Broken spindle. Replace pump. Out of fuel. Add fuel to fuel tank. Fuel shut off at tank. Open fuel shut off valve. Restricted fuel line. Clean as required. Air leak in fuel line between pump Repair as required. and tank. Loose or damaged fuel line Repair. connetions. Hand primer left in upward position. Bleed fuel system, gently push hand primer down and tighten securely. Worn or damaged valve Repair or replace. assemblies.
Broken valve spring(s) Repair or replace. Diesel Fuel Leaking Into Injection Worn spindle and/or pump housing. Replace pump. Pump Camshaft Case Defective seal. Replace seal. CD,3274,G220,23-19-04JAN99 220 19