Hawk-industries Hawkjaw Jr. Manual 65K-ALS Serial Numbers 4 to 9 Manuel d'utilisateur télécharger pdf (Page 85)

Trouble Shooting

Symptom Remedy

Trouble

Shooting

Troubleshooting 85

l If there are no leaks in the hydraulic system, and the

pump pressure compensator setting is at 2600

psi on a known, tested hydraulic power unit, and the

hydraulic power unit pressure relief valve is set

above the pump pressure compensator setting

and the hydraulic fluid still heats up, then the

pressure relief valve setting on the HawkJaw has

been changed. The pressure relief valve adjustment

is set at Hawk Industries. Under no circumstances

should this pressure relief valve be adjusted. Adjust-

ing the pressure relief valve setting voids the

warranty and can cause severe damage to the

HawkJaw and the hydraulic power unit and

shorten component life. However, if this valve has

been adjusted below 2600 psi, and the pressure

compensator setting is at 2600 psi, the hydraulic

fluid will pass over the pressure relief valve. This

will heat up the hydraulic fluid rapidly. Properly set

the pressure relief valve adjustment. On a

known, tested hydraulic power unit, set the pump

pressure compensator setting at 2650 psi. Use

an allen wrench to rotate the pressure relief valve

adjustment clockwise until the bypass sound is no

longer audible. When the bypass sound ceases, stop

rotating the pressure relief valve adjustment.

While holding the pressure relief valve adjustment

steady with an allen wrench, lock in the adjustment

by tightening the pressure relief valve lock nut. Set

the pump pressure compensator setting back

down to 2600 psi. See Drawings, p. 102.

Hydraulic fluid heats up.(cont.)Hydraulic

Fluid

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Hawk-industries Hawkjaw Jr. Manual 65K-ALS Serial Numbers 4 to 9 Manuel d'utilisateur Page 85