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7032 SOUTH 196th - KENT, WA 98032 - (253) 872-0141 / FAX (253) 872-8710
OPERATION / MAINTENANCE MANUAL
MODEL 50 VIBRATORY HAMMER WITH MODEL 260 POWER UNIT
8. Vibro Won't Come Up to Normal Operating Speed
Defective hydraulic motor or drive pump.
There may be an electrical failure.
If vibration frequency has been verified lower than normal, Replace the
hydraulic motor. If performance improves. If vibro still operates below normal
speed, replace drive motor pump.
Check for the following:
- Defective STOP button.
- Broken or loose wire in the pendant or pendant cable.
- Defective START relay.
- Defective motor START valve.
9. Vibro Won't Stop When Stop Button is Engaged
VI. VIBRO TROUBLE-SHOOTING (Continued...)
5. Opening and Closing Clamp Jaws Seems Spongy or Slow
Possible Cause
Remedy
The plunger shaft may not be properly
lubricated or may need cleaning.
The clamp hoses may have air in them
and may need bleeding.
Diesel engine is not running.
Start relay contacts may not be closing.
Hoses may be connected improperly.
Hydraulic motor may not be operating
properly.
Vibro gearbox may be frozen up.
Drive pressure is too low.
Vibrator is running.
Diesel engine may not be running.
There may be an electrical failure.
The clamp pump may be defective.
6. Vibrator Won't Start When Start Button is Engaged.
7. Clamp Won't Open When Clamp Open Switch is Engaged.
Remove the movable jaw from the clamp. Inspect the plunger shaft and check
for lubrication or debris build up. Clean the shaft if needed and then lubricate
using the grease zerk on the clamp body.
Follow the procedures listed in this manual (page 4-3, Section IV-5.) for
bleeding the clamp attachment hydraulic hoses.
Start diesel engine.
Press and hold the Start Button on the pendant. If vibro starts, replace Start
Relay.
Check hoses and make connection corrections if required.
Remove hydraulic motor from the vibro. Leave the hoses connected. Run the
power unit engine at approx. 1200 rpm. and press the start button. If motor
runs, re-attach it to the vibro. If the motor does not run, it must be replaced.
If motor is working fine and the drive pressure appears normal, then the vibro
gearbox may be frozen and in need of repair.
Manually close start valve at the drive manifold. If vibro will not start, replace
the start valve. If vibro still will not start, replace the drive pump.
The clamp won't open while the vibro is in operation. To open the clamp, stop
the vibro.
Start the power unit engine and allow clamp pressure to build.
Check for the following:
- Defective clamp switch.
- Broken or loose wire in the pendant or pendant cable.
- Defective OPEN solenoid.
- Broken or loose wire between main power switch and START relay.
- Defective or sticking clamp timing delay relay.
- Broken or loose wire between main power switch and amphenol connector.
Check clamp pump for slipping belts and tighten if required. Replace clamp
check valves if required. If clamp still won't open, replace the clamp pump.
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