Hawk Industries Hawkjaw Sr. Manual ALS Serial Numbers 1 to 100 - Manual (Page 78)

Trouble Shooting
78 Troubleshooting
Symptom Remedy
Tilt Forward
Button/Tilt
Back Button
(cont)
Spin Button
z
Check that air is reaching the Tilt hydraulic valve
VF/B at Port B. Disconnect the Tilt Back clear air
hose to the Tilt hydraulic valve VF/B Port B. To
disconnect the air hose, push the hose and collet ring
into the valve pilot port. While holding down the
collet ring, pull out the Tilt Back clear air hose.
Place your hand over the disconnected Tilt Back
clear air hose, and push in the Top Tilt air button. A
steady blast of air should come out of the hose. If
no air comes out of the hose, replace the air logic
system. See Drawings, p.126. If air comes out of
the clear hose when the Top Tilt button is pushed in,
replace the Tilt hydraulic valve VF/B. See
Drawings, p. 114, 128.
z
Make sure the "E" stop is pulled out.
z
If the Grip button is pushed in, the HawkJaw will
not spin. This feature is for safety. Make sure the
Grip button is not pressed.
z
Check to make sure the hydraulic power unit is
producing 2500 psi at 20-35 gpm.
z
Check that the HawkJaw is getting at least 100 psi
air.
z
Check that the pump pressure compensator setting
is at 2500 psi.
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 that no hissing sound comes from the Spin
button or the selector switch. An air hose is
broken, switched or disconnected if there is a
hissing sound. Locate the leak, and replace the
hose or connect the hose properly.See Drawings, p.
130,132, 128.
Push in the Tilt Forward or
Back button, and nothing
happens. (cont.)
In make mode, the HawkJaw
does not do the following:
1. Middle wrench grips pipe.
2. Spinner operates.
In break mode, the HawkJaw
does not do the following:
1. Bottom wrench grips pipe.
2. Spinner operates.
Continued on next page.