Fuel System/MICO In-line Fuel Injection Pump REMOVE FUEL SUPPLY PUMP ON MICO IN-LINE FUEL INJECTION PUMP Thoroughly clean exterior of supply pump. Also clean around supply pump mounting area on injection pump housing. 1. Disconnect fuel inlet line (removed on picture) and outlet line (A). Cap all line openings so contaminates do not enter fuel system. 2. Remove mounting nuts (B). CD30726 -UN-23FEB99 3. Pull fuel supply pump straight out from injection pump housing. Cover supply pump mounting bore so debris cannot enter injection pump. CD,3274,G40,78 -19-04JAN99 CTM3274 (01JUL99) 40-38 Saran Liter Engines 060799 PN=283 TEST MICO FUEL SUPPLY PUMP FOR LEAKS 1.
Connect compressed air line (A) to a pressure gauge (B) and to supply inlet fitting. Air line should have a regulating valve to control pressure. 2. Cap or plug supply pump outlet fitting (C). 3. Submerge supply pump in a container of clean diesel fuel. Regulate air pressure to 200 kPa (2 bar; 29 psi). 4. Move tappet in and out by hand. No air bubbles should appear around tappet. -UN-03NOV97 NOTE: If bubbles appear, it is an indication that either the seal is defective or tappet is worn. IMPORTANT: Serious injection pump or engine RG5894 damage could occur, if enough diesel fuel leaks past tappet and seal. Fuel leakage past tappet dilutes engine oil. CD,3274,G40,79 -19-04JAN99 40 38