Hawk Industries Hawkjaw Sr. Manual ALS Serial Numbers 1 to 100 - Manual (Page 94)

Trouble Shooting
94 Troubleshooting
the Cap side leader hose. Replace the seals. See
Drawings, p. 112. Replace the cylinder if necessary.
See Drawings, p. 112, 142.
z
Push in the "E" stop button. Access the main
hydraulic block. See Maintenance & Repair, p.
66,Drawings, p. 114. Use a 7/32" allen wrench to
adjust the VR/L sandwich valve H6 flow settings
at each end. Rotate clockwise to reduce speed
and counter-clockwise to increase speed of the
Raise/Lower cylinder. Pull out the "E" stop button
to test settings. Repeat process if necessary.
z
Push in the "E" stop button. Access the main
hydraulic block. See Maintenance & Repair, p. 66,
Drawings, p. 114. Use a 7/32" allen wrench to adjust
the VF/B sandwich valve H6 flow settings at each
end. Rotate clockwise to reduce speed and counter-
clockwise to increase speed of the Tilt cylinder.
Pull out the "E" stop button to test settings. Repeat
process if necessary.
z
The mount arm thrust bearing plates are reversed.
Properly connect the mount arm thrust bearing
plates. See Drawings, p. 100, 101.
z
The mount arm thrust bearings are worn out.
Replace the mount arm thrust bearings. See
Drawings, p. 100, 101.
z
Properly connect the Winch hoses to the Winch
Motor. See Drawings, p. 124.
z
Check that the Winch On and Winch Off air hoses
are properly connected to the Winch Valve. See
Drawings, p. 128.
z
Check that the Winch On and Winch Off air hoses
are properly connected in the Right control handle.
See Drawings, p. 132, 128.
z
Check that the Winch is engaged. See Installation,
p. 16.
z
Make sure the "E" stop is pulled out.
z
Check to make sure the hydraulic power unit is
producing 2500 psi at 20-35 gpm.
The Raise/Lower Cylinder
moves... (con't)
The Raise/Lower Cylinder
moves at an undesired speed
The Tilt Cylinder moves at an
undesired speed.
The mount arms do not pivot
freely.
Push in the Winch On or
Winch Off button, and the
HawkJaw moves opposite the
desired direction.
Winch does not operate.
Raise/Lower
Cylinder
Tilt Cylinder
Middle
Wrench
Mount Arms
Winch
Symptom Remedy
Continued on next page.