1994/01/24 Caterpillar

O-Ring Seal Added To Heater Lines Group {1380}

Usage:

D20D (9MG),
D250D (6NG) Articulated Trucks

Description of Change: Two O-ring seals have been added to the heater lines group. The new O-rings go on two connectors that are screwed into the cylinder block. See the illustration. The new O-rings will help prevent coolant leaks.

Adaptable To: Two new 3K-0360 O-Ring Seals have been added to the 7U-9939 Heater Lines Group. The new O-ring seals are in effect with D20D Articulated Truck 9MG75 and D250D Articulated Truck 6NG222. The new 3K-0360 O-Ring Seals can be added to the heater lines in earlier articulated dump trucks. See the procedure that follows.

Location of components in the 7U-9939 Heater Lines Group. New 3K-0360 O-Ring Seals (1). 6V-1438 Connectors (2). 2U-2526 Hose Clamps (3). 4U-7962 Heater Hoses (4).

Installation Procedure

1. Drain the engine coolant into a suitable container.

2. Loosen two 2U-2526 Hose Clamps (3) and remove two 4U-7962 Heater Hoses (4).

3. Remove two 6V-1438 Connectors (2) from the cylinder block.

4. Install two new 3K-0360 O-Ring Seals (1) on connectors (2).

5. Install connectors (2) and O-ring seals (1) in the cylinder block.

6. Install heater hoses (4) on connectors (2) and tighten hose clamps (3).

7. Fill the radiator with coolant to the correct level.

Caterpillar Information System:

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