Hawk Industries Hawkjaw Sr. Manual 100K-2GSR Serial Numbers 121 to 140 - Manual (Page 72)

Trouble Shooting Trouble Shooting
See that they are securely tightened. A bad quick
disconnect can cause the Hawkjaw to mal-function.
Replace the faulty connector.
The air pressure is low. Increase the air pressure to
the HawkJaw. See Installation.
Check to make sure the hydraulic power unit is
producing 2500 psi at 20-35 gpm.
Check to make sure the hydraulic power unit pressure
compensator setting is at 2500 psi.
There is a leak in the hydraulic system. Check for any
visual leaks in the hoses, fittings, manifolds, cylinder
rod heads, or cylinder rod wiper seals. Replace neces-
sary components. See Drawings.
There is a leak in the hydraulic system. Operate the
HawkJaw. Feel the outside of all actuators. If a portion
of the cylinder surface is too hot to leave your hand on
the cylinder, the leak is inside the cylinder. Replace the
cylinder seals. If necessary, replace the cylinder. For a
Grip cylinder, see Maintenance & Repair. For a Spinner
grip cylinder, see Drawings. For the Torque cylinder, see
Maintenance & Repair. For the Raise/Lower Cylinder,
see Drawings.
There is a leak in the hydraulic system. Disconnect
the air supply hose to the HawkJaw. Make sure the
hydraulic power unit is on. Check for Grip cylinder
piston seal integrity. Make sure no bodily parts are in
the extension path of the cylinder rod. Begin with the
Top Grip cylinder. Slowly loosen the Cap side hose.
Check for fluid flow. If there is a piston seal leak, fluid
will flow with volume out of the Cap side fitting.
Replace the seals. See Drawings. Replace the cylinder
if necessary. See Maintenance & Repair. Repeat for the
Middle Grip cylinder. See Drawings. Replace the
cylinder if necessary. See Maintenance & Repair. Repeat
for the Bottom Grip cylinder. See Drawings. Replace
the cylinder if necessary. See Maintenance & Repair.
HawkJaw performance and speed not
up to par.
Problem Remedy
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Trouble Shooting 71