MKT V-2Esc - Service Trouble Shooting

18 | SERVICE TROUBLE SHOOTING
VII. SERVICE TROUBLE SHOOTING
1. Hydraulic Fluid Overheating
Running the V-2Esc overloaded for long periods of time (drive pressure at 2500 PSI)
dumps oil over the relief valve generating heat. Simply keep the V-2Esc operating but
relax the load below the 2500 PSI level and the temperature should drop.
2. Clamp Will Not Open or Close
Clamp line quick disconnects may not be engaged completely or their check valves
may be locked closed. There also may be too much air in the line to overcome clamp
cylinder friction.
3. Increase in Lube Oil Level
This is a sure sign that the hydraulic motor has a shaft seal failure. If submerged under
water, water may have seeped into the exciter case.
4. Exciter Overheating in Specic Local Areas
Checking the temperature of the bearing side covers will give an indication of an
overheating bearing. This bearing should be checked for excessive binding or wear.
Make sure the oil level is correct. It is not unusual for the temperature of the exciter
housing to go up to 200 degrees Fahrenheit if the V-2Esc is run at full frequency over an
extended period of time. Check the lower magnetic plug for metal which might indicate
excessive wear of gears or bearings.
5. Internal Noise in Exciter
Unusual noise in exciter generally means something is wrong - either a bearing gear, or
a hydraulic motor problem. Lube oil level should be checked.
6. V-2Esc Frequency Fluctuation
Frequencyisafunctionofpumpowandmotorspeed.Ifthepumpowisnotevenor
a hydraulic motor is failing, it is possible the frequency will not be constant especially as
the load goes a little higher (before going over relief). Check for exciter hotspots which
may indicate a bearing is failing.
7. Erratic Suspension Movement
Unusual soil conditions or underground boulders may cause a rebound and effect the
suspension isolation. If the V-2Esc when started comes up to speed too slowly, it is
possible the suspension will bounce out of sync with the frequency.
8. Slow Clamp Movement
Generally, slow clamping is caused by air in the hydraulic hoses. Bleed both directions
of the clamp cylinder.
9. Jaws Slipping on Pile
Ifjawsareworntoomuchtheremaybealackofclampingjawtravel.Theclampjaw
travel is two and one eighth inches. Check clamping pressure. Air may be in the clamp
line requiring cylinder bleeding.