PRODUCT SUPPORT PROGRAM FOR REPLACING THE HYDRAULIC MAIN CONTROL VALVE COVER ON CERTAIN 365B L EXCAVATORS
Usage:
SEBE8029
June 25, 2002
U-138
A-101
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| After failure only |
PRODUCT SUPPORT PROGRAM FOR REPLACING THE HYDRAULIC MAIN CONTROL VALVE COVER ON CERTAIN 365B L EXCAVATORS |
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| 5051-CH |
PS50412
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NOTE: The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
TERMINATION DATE
June 30, 2004PROBLEM
The hydraulic main control valve cover may need to be replaced on certain 365B L Excavators. The 1999707 Cover may leak at the 6V5555 O-Ring Seal. Repeat oil leaking at the seal area may occur due to inadequate material at the main control valve body to support the seal. A new 2117943 Cover will provide a better sealing by enabling the use of a smaller 6V5586 O-Ring Seal.AFFECTED PRODUCT
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| Model | Identification Number |
| 365B L |
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PARTS NEEDED
6 - 1P3706 Seal - Rectangular4 - 6V5586 Seal - O-Ring
2 - 2117943 Cover
ACTION REQUIRED
See the attached Rework Procedure.SERVICE CLAIM ALLOWANCES
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PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.Attach. (1-Rework Procedure)
Rework Procedure
- Park the machine on level ground. Lower the bucket to the ground so that the stick is vertical.
- Create a vacuum in the hydraulic tank as to minimize oil loss.
- Remove the 1999707 Covers from the main control valve. See Illustration 1.
- Remove the orifice plugs from the 1999707 Covers and install them onto the new 2117943 Covers accordingly. See Illustration 2.
- Install the new covers onto the main control valve group with the new 6V5586 O-Rings and 1P3706 Seals.
Illustration 1
Illustration 2
Caterpillar Information System:
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