© 2020 Genesis Attachments, LLC
Genesis GHG Handling Grapple 35
Symptom
Possible Causes/Solutions
Low power
Isolate attachment from excavator and check excavator pressures at boom tip or arm
Possible cylinder, swivel or bypass (contact Genesis Service Department for
procedures)
Slow jaw open with
low power
Check for damaged seals
Slow jaw close
Check flows from excavator
Tines close
suddenly and will
not open
Ball valve may be partially closed on excavator
Excavator spool may be stuck
If attachment has quick-coupled hydraulics, they may be partially disconnected or
damaged
Does not rotate
Blown fuse
Test for 24V at plugs on directional valve while depressing foot switch
Incorrect pressure settings; reset
Does not rotate in
one direction
No electrical power to one side; test for 24V at plugs on directional valve while
depressing foot switch
Check if directional control valve shifts both ways while actuating foot switch in both
directions
Rotator chatters
Electrical short; back out flow controls
Pressure settings too high; reset
Power to both rotation solenoids at the same time; test for 24V at plugs on directional
valve while depressing foot switch
Rotates faster in
one direction
One flow control cartridge set higher than the other; reset
Rotates too fast or
too slow
Flow control out of adjustment; reset
Rotation speed
changed from
original setting
Jam nut loosened on rotation valve
Faulty cartridge (contamination)
Faulty directional control valve
Pressure set too low; reset
TROUBLE-SHOOTING GUIDE
