Hawk Industries Hawkjaw Sr. Manual ALS Serial Numbers 1 to 100 - Manual (Page 90)

Trouble Shooting
Symptom Remedy
HawkJaw performance and
speed not up to par. (cont.) flow with volume out of the Cap side fitting. Re-
place the seals. See Drawings, p. 108. Replace the
cylinder if necessary. See Maintenance & Repair, p.
59-60. Repeat for the Middle Grip cylinder. See
Drawings, p. 108. Replace the cylinder if necessary.
See Maintenance & Repair, p. 61-62. Repeat for the
Bottom Grip cylinder. See Drawings, p. 108.
Replace the cylinder if necessary. See Maintenance
& Repair, p. 63-64.
z
There is a leak in the hydraulic system. Make sure
the air supply hose to the HawkJaw is discon-
nected. 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. 106. Replace the cylinder if necessary.
See Maintenance & Repair, p. 55-58.
z
There is a leak in the hydraulic system. Make sure
the air supply hose to the HawkJaw is
disconnected. Make sure the hydraulic power unit
is on. Make sure no bodily parts are in the exten-
sion path of the cylinder rod. Check for Spinner
grip cylinder rod side seal integrity. Use a 7/32"
allen wrench to rotate the spinner motor sequence
valve clockwise to refusal. Note the number of
turns. See Maintenance & Repair, p. 67. Press and
hold the Spin button. The spinner will move forward
and the doors will close, but the chain will not move.
Slowly loosen the Spin Block Port SP fitting (Item 4
on p. 120). Check for fluid flow. If there is a piston
seal leak, fluid will flow with volume out of the
fitting. Reset the spinner motor sequence valve,
and lock in the adjustment. Replace the seals if
necessary. See Drawings, p. 110, 104. Replace the
cylinder if necessary. See Drawings, p. 110, 104.
HawkJaw
Performance
(cont)
90 Troubleshooting
Continued on next page.