Hawk Industries Hawkjaw Jr. Manual 65K-ALS Serial Numbers 4 to 9 - Manual (Page 69)

Trouble Shooting
Symptom Remedy
l
Replace the hose. See Drawings, p. 114.
l
Tighten the fitting.
l
Replace the fitting. See Drawings, p. 114.
l
Tighten the fitting.
l
Replace the fitting. See Drawings, p. 114.
l
Tighten the hydraulic valve retainer bolts. See
Drawings, p. 102, 106.
l
If the hydraulic valves V5 or V6 are upside down,
replace the O rings, and properly attach the
valves. See Drawings, p. 102.
l
The Pressure and Tank lines are switched. Prop-
erly connect the Pressure and Tank lines. See
Operation, p. 14.
l
The Grip cylinder extends if the Grip button is pushed
in. Pull out the Grip button.
l
Properly connect the Pressure and Tank lines. See
Operation, p. 14.
l
Properly connect the Rod side and Cap side hoses
to the Grip cylinder. See Maintenance & Repair, p.
59-66, Drawings, p. 114.
l
Make sure the hydraulic power unit is shut down.
Properly connect the Rod side and Cap side hoses
to the Main hydraulic manifold. See Drawings, p.
114.
l
The Grip button air valve may be stuck in the open
position. Make sure the Grip button is pulled out.
Push in the Grip button. Air should sound like it is
being sharply inhaled. Pull out the button. Air
should sound like it is being sharply exhaled. If
these sounds do not occur, replace the Grip air
valve. See Drawings, p. 110, 116.
l
If all air and hydraulic hoses are properly
connected, and the Grip air control button valve
works, replace the Grip hydraulic valve V1, V2,
or V3. See Drawings, p. 106, 110.
Leaks at
Start-up
Movement
at Start-up
Hose leaks.
Hose fitting leaks.
Hydraulic fitting leaks.
Main hydraulic manifold leaks
hydraulic fluid.
All Grip cylinders extend, and
the Torque cylinder extends
slowly.
A Grip cylinder extends.
Trouble
Shooting
Troubleshooting 69