Hawk Industries Hawkjaw Sr. Manual ALS Serial Numbers 1 to 100 - Manual (Page 93)

Trouble Shooting
Trouble
Shooting
Troubleshooting 93
Symptom Remedy
Raise/Lower
Cylinder
(cont)
z
Check that the HawkJaw is getting at least 100 psi
air.
z
Check that the pump pressure compensator
setting is at 2500 psi.
z
Check that the hydraulic filter element is not
completely full of contaminants. If the red indicator
button on the hydraulic filter body pops up, change
the filter element. See Filter Maintenance, p.35.
z
Check for any visual leaks in the hoses, fittings,
cylinder rod head, or cylinder rod wiper seal. Replace
if necessary. See Drawings, p. 124, 106-112, 116,
120-122.
z
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 pres-
sure. Push in the "E" stop button. Disconnect
the Raise/Lower cylinder Hanger Eye from the
hanging cable. See Installation, p. 13, Drawings, p.
142. 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 vol-
ume out of the Rod side leader hose. Replace the
seals. See Drawings, p.112. Replace the cylinder if
necessary. See Drawings, p. 142. 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 Raise/Lower Cylinder
moves slower than usual, or the
HawkJaw sinks while it
hangs.(cont.)
Continued on next page.