Trouble shooting – Hawk Industries Hawkjaw Sr. Manual ALS Serial Numbers 1 to 100 User Manual
Page 89
Trouble Shooting
Trouble
Shooting
Troubleshooting
89
Symptom
Remedy
HawkJaw
Performance
(cont)
HawkJaw performance and
speed not up to par. (cont.)
to see that they are securely tightened. A bad quick
disconnect can cause the Hawkjaw to mal-function.
Replace the faulty connector.
z
The air pressure is low. Increase the air pressure
to the HawkJaw. See Installation, p. 12.
z
The hydraulic pressure is low. Increase the
hydraulic pressure. Do not increase the pressure
over 2500 psi, or the hydraulic fluid will pass over
the relief valve and heat up the hydraulic fluid. This
will cause damage to the HawkJaw and to the
pump, and will severely shorten component life.
z
Check to make sure the hydraulic power unit is
producing 2500 psi at 20-35 gpm.
z
Check to make sure the hydraulic power unit
pressure compensator setting is at 2500 psi.
z
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 necessary components. See Drawings, p.
124, 106-112, 116, 120-122.
z
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, p. 59-64. For a Spinner grip
cylinder, see Drawings, p. 110. For the Torque
cylinder, see Maintenance & Repair, p. 55-58. For
the Raise/Lower Cylinder, see Drawings, p. 112.
z
There is a leak in the hydraulic system. Discon-
nect 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
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