Check The Fuel Transfer Pump Pressure When Fuel Filter Fault Codes Are Displayed On Certain Excavators Caterpillar

Check The Fuel Transfer Pump Pressure When Fuel Filter Fault Codes Are Displayed On Certain Excavators

Usage:

Check The Fuel Transfer Pump Pressure When Fuel Filter Fault Codes Are Displayed On Certain Excavators

CONFIDENTIAL TIBU3761-01

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TECHNICAL INFORMATION BULLETIN	February 23, 2005
EXCAVATORS	This Technical Information Bulletin replaces the December 18, 2002 TIB "CHECK THE FUEL TRANSFER PUMP PRESSURE WHEN FUEL FILTER FAULT CODES ARE DISPLAYED". DISREGARD THE December 18, 2002 TIB. 322C L II (HEK), 325C L (BFE), 325C MH (S2C), 325C FMHW (M2K, S3M, Y4P), 325C FMST (G1L), 330C L (DKY), 330C FMHW (B1K, B2L, B4N), 330C FMST (B3M) EXCAVATORS
	Component Code(s) 1256, 1261

SUBJECT: CHECK THE FUEL TRANSFER PUMP PRESSURE WHEN FUEL FILTER
FAULT CODES ARE DISPLAYED ON CERTAIN EXCAVATORS

PROBLEM:

Fault codes MID 36 EID 00095 "Fuel Filter Restriction" and MID 36 EID 5 "Fuel Filter Restriction Derate" indicate that the fuel transfer pump may not be delivering adequate fuel pressure.

SOLUTION:

Check the fuel pump pressure when the fuel filters are replaced for a premature fuel filter fault code. Use the Engine Status screen in the Electronic Technician (ET) to check the fuel pressure. The delivery pressure should be 434 ? 145 kPa (63 ? 21 psi).

Check the pressure regulator orifice on the fuel pump before replacing the fuel pump. Debris in the pressure regulator will restrict the flow of fuel.

Also check the pressure regulator orifice at the fuel line connection to the engine cylinder head. Remove the regulator orifice and check for debris.

COPYRIGHT 2005 CATERPILLAR
ALL RIGHTS RESERVED

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