Japan
Published 26 Aug 2003
Ref JP-1109750
Komatsu: Power transmission system
Translated from Japanese · machine translation
- Country
- Japan
- Published
- 26 Aug 2003
- Units affected
- 82
- Reference
- JP-1109750
Affected vehicles
Komatsu WA380-5 2002–2003
Komatsu WA430-5 2002–2003
Komatsu WA470-5 2002–2003
Hazard
The spool valve shape in the transmission control valve oil passage is improper, and the pressure-resistance of the hydraulic hose is insufficient. As a result, the hydraulic hose may rupture during engine startup, causing a decrease in transmission operating pressure. This may prevent clutch engagement, resulting in loss of driving capability.
Show original (日本語)
変速機制御用バルブの油路切り換え弁の形状が不適切かつ、油圧ホースの耐圧性が不足 しているため、エンジン始動時に油圧ホースが破損し、変速機作動油圧が低下するものが ある。そのため、クラッチが接続されなくなり、走行不能となるおそれがある。
Remedy
Replace the valve and hydraulic hose with corrective parts on all vehicles.
Show original (日本語)
全車両、バルブ及び油圧ホースを対策品と交換する。