The Orientation of the Turbocharger Coolant Hose May Cause Coolant to Leak on Some 3500B Engines{1070, 1380} Caterpillar

Engine:

3508B (S/N: 7SM1-UP; 5PS1-UP; 1TW1-UP)

3512B (S/N: 2AF1-UP; PWG1-UP; 2GW1-UP; 3ZW1-UP; 2EZ1-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

Engines with a water cooled turbocharger that are using a 188-5140 Hose As have experienced coolant leaks. In some instances, the hose has been oriented in a horizontal fashion. This may cause the hose to rub against the turbocharger which can result in a coolant leak.

Solution

Correct the orientation of the hose. Refer to Illustrations 1 and 2 for proper placement of the hose.

Illustration 1	g01560313
Rear view

Illustration 2	g01560318
Right side view