0R-9393 Cylinder Pack Gp Piston Ring Position on Certain C16, 3406E, and 3456 Engines{1215, 1225} Caterpillar

Agricultural Tractor:

MT865 (S/N: GDA1-UP)

Landfill Compactor:

836G (S/N: BRL1-UP; 7MZ1-UP)

Industrial Engine:

C-16 IND (S/N: BFM1-UP)

Excavator:

385B (S/N: ANS1-UP)

Wheel Loader:

988G (S/N: BNH1-UP)

Introduction

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

Problem

The 0R-9393 Cylinder Pack Gp with the date code D30M01Y07P68L were found with piston rings that are installed in the wrong position. Extremely high oil consumption may result from all the intermediate rings that are installed in the position of the top ring.

Solution

Check all stock of 0R-9393 Cylinder Pack Gp with a date code of 28January 2007 through 31January 2007. Ensure that the piston rings are in the correct position.

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Illustration 1	g01389323
(1) 153-4101 Piston Ring (2) 147-1730 Piston Ring (3) 139-8505 Piston Ring

1. Install the top piston ring (1) with the side that is marked "UP-1" toward the top of the piston.

2. Install the intermediate piston ring (2) with the side marked "UP-2" toward the top of the piston.

3. The spring ends of the oil control ring (3) should be assembled 180 degrees from the end gap of the ring.