Hawk Industries Hawkjaw Jr. Manual 65K-ALS Serial Numbers 4 to 9 - Manual (Page 83)

Trouble Shooting
Symptom Remedy
HawkJaw performance and
speed not up to par. (cont.) HawkJaw
Performance replace the cylinder. For a Grip cylinder, see
Maintenance & Repair, p. 59-66. For a spinner grip
cylinder, see Drawings, p. 92, 98. For the Torque
cylinder, see Maintenance & Repair, p. 54-58. For
the Raise/Lower Cylinder, see Drawings, p. 100, 130.
l
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. If the Torque
cylinder slowly extends, the leak exists inside a
Grip cylinder. To check for Grip cylinder piston seal
integrity, begin with the Top Grip cylinder. Make
sure no bodily parts are in the extension path of
the cylinder rod. 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, p. 96.
Replace the cylinder if necessary. See Maintenance
& Repair, p. 59-60. Repeat for the Middle Grip
cylinder. See Drawings, p. 96. Replace the cylinder
if necessary. See Maintenance & Repair, p. 61-64.
Repeat for the Bottom Grip cylinder. See
Drawings, p. 96. Replace the cylinder if necessary.
See Maintenance & Repair, p. 65-66.
l
There is a leak in the hydraulic system. Connect
the air supply hose to the HawkJaw. Make sure
the hydraulic power unit is on. Check for Torque
cylinder piston seal integrity. Make sure no bodily
parts are in the extension path of the cylinder
rod. 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 hydraulic
fitting. Replace the seals. See Drawings, p. 94.
Replace the cylinder if necessary. See Maintenance
& Repair, p. 54-58.
Trouble
Shooting
Troubleshooting 83
Continued on next page.