Incorrect Operation Of The Two-Way Auxiliary Control Lever On 301.5, 301.6, 301.8 and 302.5 Mini-Hydraulic Excavators
Usage:
CONFIDENTIAL TIBU4303-00
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TECHNICAL INFORMATION BULLETIN |
July 14, 2004 |
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Mini Hydraulic Excavators |
301.5 (3YW4174-4328) 301.6 (BDH1022-1037) 301.8 (BFA2883-3082) 302.5 (4AZ5654-5928) |
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Component Code(s) 1329 5057 |
SUBJECT: Incorrect operation of the two-way auxiliary control lever on certain 301.5, 301.6, 301.8 and 302.5 Mini-Hydraulic Excavators.
PROBLEM:
The operation of the two-way auxiliary valve contradicts the machine labeling on certain 301.5, 301.6, 301.8 and 302.5 Mini-Hydraulic Excavators. The system delivers single direction flow when the lever is in the two directional flow position and visa versa.
SOLUTION:
The 232-6118 valve assembly can be reworked using the following procedure,
- Access 232-6118 valve assembly from the underside of machine.
- Remove handle and lock ring from valve spindle.
- Turn spindle to the position shown in illustration 1, note orientation of cut.
- Remove stopper plate and rotate spindle counterclockwise through 90 degrees.
- Reinstall stopper plate as shown in illustration 2.
- Reinstall lock ring and handle.
- Check valve for correct operation.
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Illustration 1: Valve before rework. |
Illustration 2: Valve after rework. |
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