TROUBLESHOOTING /SYSTEM PERFORMANCE

A-4. Movement speed is normal in "work mode" (LOW) but top speed is not reached in "travel mode" (AUTO).

（３）Internal leakage or sticky movement of HST motor system press ure control section

If no abnormalities are found in all the preceding checks and st ill the full speed (15 km/h) is not reached in the "travel mode", the inclination of the moto r's swash plate is not switched to the small capacity position (small-torque, high-spee d position) from the large capacity position (large-torque, low-speed position).

1. The 1st gear fixing control piston ① is sticking

2. The piston ② is sticking.

3. The system pressure control valve is internally leaking or th e spool ③ is sticking.

4. The orifice ④ is clogged.

Faulty

Replace HST motor assembly.

Troubleshooting