Hawk Industries Hawkjaw Jr. Manual 65K-ALS Serial Numbers 4 to 9 - Manual (Page 74)

Trouble Shooting
Symptom Remedy
Push in a Grip button, and
nothing happens. (cont.)
A loud hissing sound comes
from the Spin button.
Push in the Spin button, and
nothing happens.
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Check that the Grip button air valve works. Push
in the Grip button. Air should sound like it is being
sharply inhaled. Release the button. Air should
sound like it is being sharply exhaled. If these
sounds do not occur, replace the Grip button air
valve. See Drawings, p. 110, 116.
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Check that air is reaching the Grip hydraulic
valve. Make sure the hydraulic power unit is shut
down. Pull out the Grip button. Disconnect the
Grip button air hose to the Grip hydraulic valve.
The bottom Grip yellow air hose connects to Grip
hydraulic valve V1, middle Grip orange hose to
V2, and top Grip blue hose to V3. To disconnect the
air hose, push the hose and collet ring into the valve
port. While holding down the collet ring, pull out the
Grip air hose. Place your hand over the discon-
nected Grip air hose, and push in the Grip air button.
A steady blast of air should come out of the hose.
If air comes out of the hose, replace the Grip
hydraulic valve. See Drawings, p. 106. If no air
comes out of the hose, the air hoses are improp-
erly connected within the Left control handle. See
Drawings, p. 110.
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Properly connect the Spin air hoses within the
Right control handle. See Drawings, p. 112.
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The middle or bottom Grip button must be pushed
in for the Spinner to work. This feature is for
safety. For make up, push in the middle Grip. For
break out, push in the bottom Grip.
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Check to make sure the hydraulic power unit is
producing 2600 psi at 20-35 gpm.
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Check that the HawkJaw is getting at least 100 psi
air.
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Check that the pump pressure compensator
Grip Button
Spin Button
74 Troubleshooting
Continued on next page.