Hawk Industries Hawkjaw Sr. Manual ALS Serial Numbers 1 to 100 - Manual (Page 76)

Trouble Shooting
76 Troubleshooting
Symptom Remedy
Tilt Forward
Button/ Tilt
Back Button
z
Properly connect the Tilt Cylinder Rod side and Cap
side hoses to the Tilt Cylinder. See Drawings, p.
124.
z
Properly connect the Tilt Cylinder Rod side and
Cap side hoses to the Main Hydraulic block. See
Drawings, p. 124.
z
Check that the Tilt Forward and Tilt Back air hoses
are properly connected in the Left control handle.
See Drawings, p. 130, 128.
z
If all other air and hydraulic hoses are properly
connected, the air hoses are switched in the main
hydraulic block. 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. Connect the Gray air hose goes to Port A and
the Clear air hose to Port B on the Tilt hydraulic
valve VF/B. See Drawings, p. 128.
z
Make sure the "E" stop is pulled out.
z
If the Grip button is pushed in, the HawkJaw will
not tilt forward or back. This feature is for safety.
Make sure the Grip button is not pushed in.
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 Tilt
Forward or Back button. 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, 128.
Push in the Tilt Forward or
Tilt Back button, and the
HawkJaw moves opposite the
desired direction.
Push in the Tilt Forward or
Back button, and nothing
happens.
Continued on next page.