Hawk Industries Hawkjaw Jr. Manual 65K-ALS Serial Numbers 4 to 9 - Manual (Page 70)

Trouble Shooting
Symptom Remedy
Movement
at Start-up Spinner doors close.
Torque Cylinder extends.
l
If the bottom Grip button is pushed in and the Spin
button is stuck in, the spinner will operate. Pull out
the bottom Grip button. If the Spin button sticks,
screw off the button, and clean thoroughly. If the
button still sticks, replace the Spin button air
valve. See Drawings, p. 112, 118.
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Make sure the hydraulic power unit is shut down.
Pull out all Grip buttons. With the Grip buttons
pulled out, no air should reach the Spin hydraulic
valve. Disconnect the green air hose to Port B on
the Spin hydraulic valve. 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 green
air hose. If no air comes out of the hose, replace
the Spin hydraulic valve V5. See Drawings, p. 102,
108. If air comes out of the hose, replace the Air
logic manifold. See Drawings, p. 110.
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Properly connect the Pressure and Tank lines. See
Operation, p. 14.
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If the Torque button sticks, screw off the button,
and clean thoroughly. If the button still sticks,
replace the Torque button air valve. See Draw-
ings, p. 112, 118.
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Properly connect the Rod side and Cap side hoses
to the Torque cylinder. See Maintenance & Repair,
p. 54-56, Drawings, p. 114.
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Properly connect the Rod side and Cap side hoses
to the Main Hydraulic manifold. See Drawings, p.
114.
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Make sure the hydraulic power unit is shut down.
Check to see that the Grey air hose goes to Port A
and the Blue air hose to Port B on the Torque
hydraulic valve. See Drawings, p. 108.
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The Torque button air valve may be stuck in.
Push in the Torque button. Air should sound like it
is being exhaled, and then the air sound should cease.
If the air exhale sound followed by silence does
not occur, replace the Torque button air valve.
70 Troubleshooting
Continued on next page.