Oil Screens May Crack and Degrade on Certain C175 and 3512E Engines {125H} Caterpillar

Engine

3512E (S/N: BZ31-UP; SK31-UP; SK51-UP)

Off-Highway Truck/Tractor

793F (S/N: SND1-UP; SSP1-UP; SXP1-UP; D3T1-UP; RBT1-UP)

794 AC (S/N: MN51-UP; MT51-UP)

795F AC (S/N: ERM1-UP)

795FAC XQ (S/N: SNT1-UP)

797F (S/N: LAJ1-UP; WSP1-UP; LTZ1-UP)

Introduction

The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.

Problem

Illustration 1	g06359872
Cracked/Brittle Oil Screen

Oil screens mounted between the high-pressure fuel pump and mounting adapter have been found highly degraded, brittle, and cracked on certain C175 Off-Highway Truck Engines and 3512E Well Service Engines. Refer to Illustration 1.

Note: The reference part numbers for C175 Engines is 459-6534 Filter Screen As and 3512E Engines is 493-0525 Filter Screen As.

Solution

Caterpillar ^® is aware of the problem. As an interim repair, Caterpillar recommends that the oil screen be replaced with a new oil screen at any time when the High-Pressure Fuel Pump is removed, regardless of reason for pump removal.