Hawk Industries Hawkjaw Sr. Manual ALS Serial Numbers 1 to 100 - Manual (Page 68)

Trouble Shooting
Symptom Remedy
z
Pull out the "E" stop button. See Operation, p. 17.
z
Check that the HawkJaw is getting at least 100 psi
air.
z
Make sure the Pressure and Tank quick
disconnects to the HawkJaw are securely tightened.
See Operation, p. 17.
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 to see if the "E" Stop air button works. Push
in on the "E" Stop button. Air should sound like it is
sharply exhaled. Pull out on the button. Air should
sound like it is enhaled. If these sounds do not
occur, replace the "E" Stop Air Button. See pg.
132, 128.
z
Replace the air logic system. See Maintenance &
Repair, p. 66, Drawings, p. 126.
z
Replace the hose. See Drawings, p. 124.
z
Tighten the fitting.
z
Replace the fitting. See Drawings, p. 116, 120-122.
z
Tighten the fitting.
z
Replace the fitting. See Drawings, p. 116, 120-122.
z
The Pressure and Tank lines are switched. Properly
connect the Pressure and Tank lines. See
Operation, p. 17.
z
Make sure the hydraulic power unit is shut down.
Press the Grip button repeatedly to bleed hydraulic
pressure. Properly connect the Rod side and Cap
side hoses to the Grip cylinder. See Maintenance &
Repair, p. 59-64, Drawings, p. 124.
z
Properly connect the Rod side and Cap side hoses to
the Main hydraulic block. See Drawings, p. 116,
124.
z
The Grip button air valve may be stuck. If the Grip
button sticks, screw off the button, and clean
thoroughly. If the button still sticks, replace the
Grip button air valve. See Drawings, p. 130, 128.
Unit Does Not
Operate at
Start-up
Leaks at
Start-up
Movement
at Start-up
Push any button, and nothing
happens.
Hose leaks.
Hose fitting leaks.
Hydraulic fitting leaks.
All Grip cylinders extend, and
the Torque cylinder extends.
One or more Grip cylinders
extend.
68 Troubleshooting
Continued on next page.