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 Accumulator Operation Make sure all internal pressure is released Before repairs are made on accumulators.   ........\\\///........ RESPONSE OF ACCUMULATOR IS SLOW   Possible Causes   Remedy 1) Precharge is too low. 1) Check precharge pressure and recharge as necessary. 2) Piston binding. 2) Disassemble and repair piston. 3) Weak spring(s). 3) Disassemble and replace spring(s). 4) Hydraulic line size too small. 4) Remove and replace line with correct size.   ........\\\///........ LONG PUMP-UP TIME   Possible Causes   Remedy 1) Precharge to low or no precharge pressure. 1) Check precharge pressure and recharge as necessary. 2) Low pump volume. 2) See "Improper Operation of Pumps" troubleshooting section. Check output of pump. 3) Weak spring(s). 3) Disassemble and replace spring(s). 4) Unloading valve set too low. 4) Adjust the unloading valve to the correct specifications. 5) Relief valve set too low or partially stuck open. 5) See below:       a) Adjust valve to correct set pressure. b) Remove, repair or replace valve.   ........\\\///........ ACCUMULATOR FAILS TO ABSORB SHOCK PRESSURES   Possible Causes   Remedy 1) Lost precharge. 1) Determine cause of lost precharge, repair if necessary. Recharge accumulator to correct precharge. 2) Precharge is too high. 2) Recharge accumulator to correct precharge pressure. 3) Diaphragm or bladder ruptured. 3) See below:   a) Bladder pinched when installed. b) Check for operating fluid temperature too high.   a) Replace following manufacturer's installation procedure carefully. b) Reduce temperature. 4) Piston seized. 4) Disassemble and repair or replace. 5) Hydraulic line size is too small. 5) Remove and replace line with correct size.   ........\\\///........ WILL NOT HOLD PRECHARGE   Possible Causes   Remedy 1) Ruptured diaphragm or bladder. 1) Disassemble and replace. 2) Charging valve leaks. 2) Remove and replace. 3) Piston seal, diaphragm, or bladder leaks. 3) Disassemble and replace. Check compatibility of fluid and rubber material. 4) Loose body assembly bolts (diaphragm-type). 4) Torque bolts to proper tightness.   All rights of this site is reserved to Global Technical Services.        site design and developed by Mrin Mediatech