The Stick Cylinder May Leak Hydraulic Fluid On Certain Excavators Caterpillar

The Stick Cylinder May Leak Hydraulic Fluid On Certain Excavators

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The Stick Cylinder May Leak Hydraulic Fluid On Certain Excavators

CONFIDENTIAL TIBU4339-00

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TECHNICAL INFORMATION BULLETIN	SEPTEMBER 01, 2004
EXCAVATORS	330C (MCA, JAB, NAB, JCD, GAG, BTM), 330C L (CYA, HAA, KDD, RBH, JNK, MKM, SCN, CAP, GKX, DKY), 330C FMST (B3M), 330C FMHW (B4N), 330C LN (CGZ) EXCAVATORS
	Component Code(s) 5458

SUBJECT: THE STICK CYLINDER MAY LEAK HYDRAULIC FLUID ON CERTAIN
EXCAVATORS

PROBLEM:

Hydraulic fluid may leak from the hydraulic cylinder for the stick. The leaks occur on the rod assembly at the head end of the hydraulic cylinder.

SOLUTION:

If hydraulic fluid leaks from the 191-5551 Stick Cylinder Gp, replace the former 204-2848 U-Cup Seal with a new 191-5646 U-Cup Seal. The new seal is made from a material that is softer than the former seal. The new seal is available in the new 231-6844 Seal Kit. The new and the former components are listed in Table 1. The location of the new seal is shown in Illustration 1.

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New Seal For The 191-5551 Stick Cylinder Gp
Qty	New Part Number	Description	Former Part Number
1	191-5646	U-Cup Seal	204-2848
1	231-6844	Seal Kit	215-9987

Table 1.

Illustration 1. 191-5551 Stick Cylinder Gp
(B) 191-5646 U-Cup Seal
(C) Backup Ring For The U-Cup Seal

COPYRIGHT 2004 CATERPILLAR
ALL RIGHTS RESERVED

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