Evolution About Us TLM Objectives Services Offered Useful Information Did You Know Contact Us Feedback Customer's Appreciation Site Map Home     Glossary of Terms BIS standards Equivalent standard Metal Test Specimens Equivalent chart Hydraulic oils Trouble shooting Conversion Table Select Trouble Shooting Options Unusal Operating Noise Improper Operation of...... ..........> Pumps ..........> Valve ..........> Directional Control Valve ..........> Flow Control & Check Valve ..........> Cylinder ..........> Hydraulic Filter ..........> Hydraulic Motor ..........> Accumulator Hydraulic Fluid Problems Tubing and Pipe Grease Application Cutting/Griding Operations Improper Hydraulic Motor Operation ........\\\///........ EXCESSIVE MOTOR NOISE   Possible Causes   Remedy 1) Motor-load coupling misaligned. 1) Realign motor and load coupling to within 005 in T.I.R. 2) Motor running away. 2) See below:   a) No flow control on motor. b) Excessive load.   a) Add flow control to outlet. b) Reduce the load. 3) Aeration due to foaming. 3) See below:       a) Add an anti-foam concentrate. b) Flush, clean, and refill system with fluid having anti-foam additives. 4) Cavitation 4) See below:   a) Excessive motor speed. b) Improper fluid viscosity. c) Fluid too cold. d) Restricted inlet line. e) Hydraulic pump is cavitating.   a) Reduce motor speed to specification. b) Change to fluid with a viscosity that is recommended by motor manufacturer. c) Preheat the fluid. d) Remove restriction at the inlet. e) Eliminate hydraulic pump cavitation. 5) Case drain restricted. 5) Remove, clean, and replace drain line to remove the restriction. 6) Sticking vane (on vane motors). 6) Disassemble, replace parts and reassemble, or replace the motor. 7) Worn or broken parts. 7) Disassemble, replace parts and reassemble, or replace the motor.   ........\\\///........ MOTOR RUNS EXCESSIVELY HOT   Possible Causes   Remedy 1) Inlet oil is hotter than normal. 1) See below:   a) Problem with pump. b) Wrong viscosity oil. c) Oil cooler obstruction or low capacity. d) Low reservoir level.   a) See "Improper Operation of Pumps" troubleshooting section. b) Replace fluid with fluid of the correct viscosity. c) Remove obstructions from the oil coolers or install a cooler with sufficient cooling capacity. d) Fill reservoir to the correct level. 2) Excessive motor slippage. 2) Disassemble and inspect motor elements; replace all worn or damaged parts. 3) Drain line restricted. 3) Remove and clean or replace. 4) Excessive flow rate through the relief valve. 4) See below:       a) Reduce the pump output. b) Readjust the flow control valve to the proper flow rate.     All rights of this site is reserved to Global Technical Services.       site design and maintained by Mod Graphics