www.energyabsorption.com
Revision B December 2013
www.highwayguardrail.com
24
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Quick Troubleshooting Guide
(Williams/Monarch Pumps)
NEVER STAND BENEATH THE TMA WHEN IT IS BEING LOWERED OR SOMEONE IS AT
THE CONTROLS
Finding and Solving Problems:
Hydraulic system failures usually follow a similar pattern: A gradual or sudden loss of pressure
or flow, followed by a loss of cylinder or motor power. Any of the systems components could be
the cause. The problem may be solved by following a step by step procedure.
1. Motor Fails to Start:
□
Failed Motor Starter Solenoid: Replace if necessary.
□
Electrical switch inoperative: Repair or replace.
□
“Open” circuit/insufficient grounding: Check and correct.
□
Motor inoperative: Repair or replace.
2.
System is Inoperative
□
No oil in system; insufficient oil in system; pump losing prime: Fill system. - Check for
leaks.
□
Wrong oil in system (Should be Dexron
®
III): - Change oil.
□
Clogged or dirty filter: Drain oil and replace filter or element.
□
Oil line restricted: Line dirty or collapsed - Clean or replace oil line.
□
Air leaks in pump suction line: Repair or replace as needed.
□
Worn or dirty pump: Clean, repair or replace; check alignment; check for contaminated
oil - drain, flush, and refill system with approved oil.
□
Badly worn components (valves, cylinders, etc.): Examine and test for internal or
external leakage. Replace faulty components. Check for cause of wear.
□
Leakage: Check all components, especially the relief valve, for proper settings.
□
Excessive
load.
□
Broken or slipping pump drive: Repair or replace belt couplings, etc. Check for proper
alignment or tension.
□
“Ground” fault.
3. System Operates Erratically
□
Air in system: Check suction side for leaks. Repair.
□
Cold oil: Allow system to warm up.
□
Damaged or dirty components: Clean or repair as needed.
□
Restricted lines or filters: Clean and/or replace lines or elements as necessary.
4. System Operates Slowly
□
Oil viscosity too high; cold oil: Allow oil to warm up before operating or replace oil with
proper specified oil.
□
Low oil level: Check reservoir & add oil as necessary.
□
Air in system: Check suction side for leaks – repair; cycle system several times to
relieve air from system.
□
Worn pump valves, cylinders, etc. Replace or repair as necessary.
□
Restriction in lines or filters: Clean or replace elements or lines.
□
Improperly adjusted flow control valve: Replace or adjust as necessary.
□
Oil leaks: Tighten fittings; replace seals or damaged lines. Low Voltage.
