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68
Note:Leave the pressure gauge in place.
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2.
Locate the pressure switch and remove the cap screw
plug.
3.
Insert the allen wrench into the adjustment screw.
4.
With the engine running and the pump switch on, raise the
engine rpm to 1500 and initiate a pack cycle and watch
the pressure gauge. Note when the packer begins the
return cycle.
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Note:If the setting is incorrect, the packer will either return
early (before the system pressure reaches 2350 psi),
or it will continue packing the load after system
pressure has passed 2350 psi.
5.
If the system does not "react" properly, lower the main
pressure to 2350 psi.
6.
Adjust the pressure switch by screwing or unscrewing
¼ turn at a time. The valve should be pressurized
momentarily. If the pressure stays when you turn the
screw in ¼ turn, that means the switch pressure is the
same as the relief valve, for instance, 2350 psi.
7.
Readjust the main relief to 2500 psi.
8.
Repeat step 4 and recheck the pressure reading.
9.
When you are satisfied the pressure setting is correct
(150 psi below main system pressure or 2350 psi),
remove the allen key and replace the cap screw plug.
10.
Remove the pressure gauge.
Timer Adjustment
The timer is a relay switch used to delay the return of the packer
once it has completed a pack cycle. It is wired in the pack
system and is set to 2 seconds. If the truck is equipped with an
electronic controller, it is not possible to adjust the delay, which
is also set, in this case, to 2 sec.
The desired time unit is displayed in the time unit display
window above the time setting dial.
IMPORTANT
A
LWAYS SET TIME UNIT TO SECONDS
.
Part #: 90309
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