TROUBLESHOOTING 8.2 8. 2A Hydrostatic Drive 8.2A Hydrostatic Drive 8.2B Final Drive Transmission 8.2C Park Brake 8 8-8 Symptom Cause Remedy No power on one side (both directions) Reservoir low on oil Replenish with 10W30 API SJ oil. Check for hose or fitting leak. Disconnected control linkage Reconnect and adjust linkage. Groove pin sheared on pump pintle lever Replace. Check pintle lever for loose bolt or excessive play. High pressure line failure Replace line. Ensure new line fits without being forced. If necessary stress relieve. Drive chain failure Adjust tightener tension. Replace chain or connection link. Motor shaft or key failure Check mounting bolts.
Inspect and repair defective parts. motor Excessive internal leakage in and/or motor pump Inspect and repair defective unit. Flush al lines and tank. Replace filter. Check on type of fluid used and engine rpm. No power on one side (one direction only) Defective relief valve Replace defective valve. Damaged ball check Disassemble and repair. No power on both sides (also loss of hydraulic power) Reservoir low on oil Replenish with 10W30 API SJ Check for hose or fitting leaks Universal Joint failure between engine and pump Inspect and repair damaged parts Flush all lines and tank, change filter.
Check on type of fluid used and engine RPM Damaged ball check Disassemble and repair Gradual loss of power as machine warms up Excessive internal leakage in pump and/or motor Consult dealer or Thomas Service Dept. Symptom Cause Remedy System erratic and/or noisy reservoir Air in system due to low oil level in oil. Replenish with 10W30 API SJ Air in system due to leak at suction fitting Check fittings and tighten. Internal pump or motor wear caused by over speeding Consult your dealer or Thomas Service Dept. Excessive play in linkage or pintle lever Adjust linkage and tighten or replace pintle lever.
Machine will not travel in a straight line in high range Control levers binding Check that shields are not stopping lever from full travel. Check for linkage binding at spring mount. Adjust tracking. Symptom Cause Remedy Final drive trans- mission noisy Final drive trans- mission noisy No lubricating oil Parking brake damaged or out of adjustment Axles have too much end play Chain loose Check and bring oil to the proper level.
Use 10W30 SJ engine oil Inspect and adjust or replace damaged parts Pre-load axle bearings removing all end play Adjust or replace chain Symptom Cause Remedy Brake will not hold machine Brake valve will not release pres- sure Verify position of over- ride Brake parts dam- aged or worn Consult your Dealer or Thomas Service Dept. Brakes are disen- gaged Engage parking brake Brake will not release machine Brake will not release machine No power to brake valve solenoid Check fuse, If fine, con- sult Dealer or Thomas Service Dept. No pressure in supply line to brake valve Consult your Dealer or Thomas service Dept. Brakes are engaged Release brake