Hawk-industries Hawkjaw Jr. Manual 65K-ALS Serial Numbers 4 to 9 Manuel d'utilisateur télécharger pdf (Page 72)

Trouble Shooting

Symptom Remedy

l Make sure the hydraulic power unit is shut down.

Check to see that the Green air hose goes to Port B

and the Black air hose to Port A on the Raise/

Lower hydraulic valve. See Drawings, p. 108.

l If all other air and hydraulic hoses are properly

connected, the air hoses are switched in the Left

control handle. Properly connect the Raise and

Lower air hoses in the Left control handle. See

Drawings, p. 110.

l Properly connect the air hoses within the Left

control handle. See Drawings, p. 110.

l If a Grip button is pushed in, the HawkJaw will not

raise or lower. This feature is for safety. Make

sure all Grip buttons are pulled out.

l Check to make sure the hydraulic power unit is

producing 2600 psi at 20-35 gpm.

l Check that the HawkJaw is getting at least 100 psi

air.

l Check that the pump pressure compensator

setting is at 2600 psi.

l 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.

l Check that no hissing sound comes from the Raise

or Lower button. An air hose is broken or

disconnected if there is a hissing sound. Locate

the leak, and replace the hose. See Drawings, p.

110.

l Check that the Raise or Lower button air valve

works. Push in the 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 Raise or

Push in the Raise button or the

Lower button, and the

HawkJaw moves opposite the

desired direction. (cont.)

A loud hissing sound comes

from the Raise or Lower button.

Push in the Raise button or the

Lower button, and nothing

happens.

Raise Button

Lower Button

72 Troubleshooting

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Hawk-industries Hawkjaw Jr. Manual 65K-ALS Serial Numbers 4 to 9 Manuel d'utilisateur Page 72

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