Hawk Industries Hawkjaw Sr. Manual ALS Serial Numbers 1 to 100 - Manual (Page 80)

Trouble Shooting
80 Troubleshooting
Symptom Remedy
z
Determine which hydraulic valve to replace. Make
sure the air hoses are connected to the hydraulic
valves V1 and V2. Place your fingers over the
small vent where the valve body joins with the
aluminum end cap on one end of the hydraulic
valves V1 and V2 at Port B. Push in the Spin
button. Your finger should feel a blast of air at each
vent. If no air comes out of the air vent on the
hydraulic valve V1 and/or V2, replace the hydraulic
valve. See Drawings, p. 114, 128. If air comes out
of each vent, proceed to the next step.
z
With the selector switch on make, check that air
reaches the Grip hydraulic valve VG2. With the
selector switch on break, check that air reaches the
Grip hydraulic valve VG1. The green Grip air hose
connects to VG2. The black Grip air hose connects
to VG1. Disconnect the Grip valve air hose. 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 air hose. Place your hand
over the disconnected air hose, and push in the Spin
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 Grip air hose when the Spin button
is pushed in, replace the Grip hydraulic valve VG2
for make up or VG1 for break out. See Drawings, p.
114, 128.
z
Make sure the "E" stop is pulled out.
z
If the Spin button is pushed in, the HawkJaw will
not grip. This feature is for safety. Make sure the
Spin button is not pressed.
z
Make sure the Selector switch is set for make up or
break out.
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.
Spin Button
(cont)
Grip Button
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.
(cont.)
In make mode, the Grip button is
pushed in. The HawkJaw
does not do the following:
1. Top wrench grips pipe.
2. Middle wrench grips pipe.
In break mode, the HawkJaw
does not do the following:
1. Middle wrench grips pipe.
2. Bottom wrench grips pipe.
Continued on next page.