Hawk Industries Hawkjaw Sr. Manual ALS Serial Numbers 1 to 100 - Manual (Page 83)

Push in the Torque button, and
nothing happens. (cont.)
Trouble Shooting
Symptom Remedy
Torque
Button
(cont)
Trouble
Shooting
Troubleshooting 83
z
Make sure the hydraulic power unit is shut down.
Press the Grip button repeatedly to bleed hydraulic
pressure. Access the main hydraulic block. See
Maintenance & Repair, p. 66, Drawings p. 114, 128.
Check that air is reaching the hydraulic valves V1
and V2. The Torque blue air hose connects to Port
A on the hydraulic valve V1. Disconnect the
Torque button blue air hose from the hydraulic valve
V1. 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 Torque blue air
hose. Place your hand over the disconnected Torque
blue air hose. Push in Grip, and press Torque. 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. Repeat this process
for hydraulic valve V2. The Torque orange air
hose connects to Port A on the hydraulic valve V2.
If air comes out of the hose when the Grip and
Torque air buttons are pushed in, proceed to the
next step.
Continued on next page.