Hawk Industries Hawkjaw Sr. Manual 100K-2GSR Serial Numbers 101 to 120 - Manual (Page 73)

Trouble Shooting
Hydraulic fluid heats up.
The Raise/Lower Cylinder moves slower than
usual, or the HawkJaw sinks while it hangs.
There is a leak in the hydraulic system. See Trouble
Shooting.
Check to make sure the hydraulic power unit is
producing 2500 psi at 20-35 gpm.
Check that the HawkJaw is getting at least 100 psi air.
Check that the pump pressure compensator setting
is at 2500 psi.
Check that the hydraulic filter element is not com-
pletely full of contaminants. If the red indicator
button on the hydraulic filter body pops up, change
the filter element. See Filter Maintenance.
There is an inner seal leak in the cylinder. Make sure
the HawkJaw rests on the rig floor. Shut down the
hydraulic power unit. Push the Grip button
repeatedly to bleed all hydraulic pressure. Push in
the "E" stop button. Disconnect the Raise/Lower
cylinder Hanger Eye from the hanging cable. See
Installation & Drawings. Place the Raise/Lower
cylinder Rod side end on the rig floor. Pull out the
"E" stop button. Turn on the hydraulic power unit.
Push in the Lower button, and hold down the Lower
button. While holding down the Lower button, check
for Raise/Lower cylinder piston seal integrity. Make
sure no bodily parts are in the extension path of
the cylinder rod. Slowly loosen the HawkJaw Rod
side Leader hose. Check for fluid flow. If there is a
piston seal leak, fluid will flow with volume out of the
Rod side leader hose. Replace the seals. See Draw-
ings. Replace the cylinder if necessary. See Drawings.
Push and hold the Raise button. After the Raise/
Lower cylinder has fully retracted, check for Raise/
Lower cylinder piston seal integrity. Make sure no
bodily parts are in the extension path of the
cylinder rod. Slowly loosen the HawkJaw Cap side
Leader hose. Check for fluid flow. If there is a
piston seal leak, fluid will flow with volume out of the
Cap side leader hose. Replace the seals. See Draw-
ings. Replace the cylinder if necessary. See Drawings.
Troubleshooting 73
Problem Remedy