725, 730 & 730 EJECTOR Articulated Trucks, Loss of Positioning of Valve Spool and Overheating of Hydraulic Oil Eliminated by New Plug in Hoist Control Valve Caterpillar


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725, 730 & 730 EJECTOR Articulated Trucks, Loss of Positioning of Valve Spool and Overheating of Hydraulic Oil Eliminated by New Plug in Hoist Control Valve [TIBU4683]
HYDRAULIC SYSTEM
VALVE GP-CONTROL
725, 730 & 730 EJECTOR Articulated Trucks, Loss of Positioning of Valve Spool and Overheating of Hydraulic Oil Eliminated by New Plug in Hoist Control Valve

CONFIDENTIAL TIBU4683-00

TECHNICAL INFORMATION BULLETIN

November 17, 2005

Articulated Trucks

725 (AFX1179-Up, B1L1-549), 730 (AGF1092-Up, B1M1-467), 730 EJECTOR (B1W1-187)

 

Component Code(s) 5136

SUBJECT: 725, 730 & 730 EJECTOR Articulated Trucks, Loss of Positioning of Valve Spool and Overheating of Hydraulic Oil Eliminated by New Plug in Hoist Control Valve

PROBLEM:

The 222-4737 Plug (1) may come loose from the end of valve spool (2) on certain hoist control valves. This will result in the loss of correct positioning of the valve spool and cause overheating of the hydraulic oil.

Affected Hoist Control Valves

725 (AFX1179-Up),

730 (AGF1092-Up)

241-4680

725 (B1L1-549),

730 (B1M1-467)

260-0285

730 EJECTOR (B1W1-187)

260-0286

SOLUTION:

The 222-4737 Plug (1) should be replaced with a 013-9041 Socket Setscrew. When you install a 013-9041 Socket Setscrew, first apply 154-9731 Thread Lock Compound to the threads of the socket setscrew.

COPYRIGHT 2005 AVSpare
ALL RIGHTS RESERVED

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