TM   10-3930-638-24&P 2-41. BRAKE SYSTEM TROUBLESHOOTING (cont) MALFUNCTION TEST  OR  INSPECTION CORRECTIVE ACTION 8. EXCESSIVE SERVICE BRAKE PEDAL EFFORT REQUIRED (cont) Step 6. Operate lift control lever with engine at full throttle. Check that mast assembly operates normally. a. If mast assembly operates normally, proceed to step 7. b. If mast assembly does not operate normally, troubleshoot hydraulic system (para 2-46, MAL- FUNCTION 1). Step 7. Operate all levers several times with engine off. Remove plug or cap from hydraulic pump and install 0-3000 PSI pressure gage. Start engine and, with transmission in neutral, operate at fast idle. Operate and hold lift control lever toward you until tube assembly is warm to touch (mast assembly will be at full height). 2-268  Change  2