Identifying Oil Pumps on Certain 3400, C27, and C32 Machine Engines {1304} Caterpillar

Engine

3400

C27 Engines

C32 Engines

Description Of Change: The improved oil pump body assembly is more robust.

Adaptable To: The following changes are adaptable to the products within the listed serial numbers, and are effective with all products after the listed serial numbers.

New Oil Pumps obtained from Reman and/or Caterpillar^® between 01 May 2014through 31 December 2015should have pump casting code inspected during an intervention and/or at engine rebuild.

Note: New Oil Pumps 520-2923 and 520-2924 not required to be inspected.

Note: If an oil pump is identified as failing to meet specifications, enter a DSN ticket.

Illustration 1	g06174598
General location of serial number and casting code locations. (1) Foundry Code (2) Date Code (3) Serial Number

Illustration 2	g06174711
Proper way to interpret casting code. (1) Foundry Code (2) Date Code (4) Year (2015) (5) Month (January) (6) Day (10)

Illustration 3	g06174715
Description of location and tooling for inspection.

If pump housing falls within suspect range, measure area denoted by “X”s to determine if casting meets specifications. Refer to Illustration 3.

Casting wall thickness will be a minimum of 4.8 mm.

Refer to Illustration 3 for the appropriate measuring device.