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Main relief
74
M
S
AIN
As with all hydraulic systems, it may be necessary to
periodically check and adjust pressure relief settings.
Commercial Front Loader
?
Note: The system pressure should be at 2500 psi
(S
TARLIGHT
Adjustment procedure:
1.
Remove the cap on the quick coupler located at the top of
the main valve bank. Insert a 0-3000 psi pressure gauge.
2.
With the engine running and the pump switch on, raise the
engine RPM to 1500 and return all hydraulics to their
"home" position (packer at the front of the body, arms
Quick
down, forks down, top door open, tailgate closed). Note
coupler
the reading on the gauge.
3.
If adjustment is required (system pressure is higher or
lower than 2500/2750 psi, depending on truck model),
switch off the pump and locate the pressure relief valve
screwed into the inlet section of the main valve bank.
4.
Loosen the locknut and turn the screw clockwise to
increase system pressure, counterclockwise to decrease.
5.
Repeat step 2.
6.
When the hydraulic pressure is set to 2500/2750 psi
(depending on truck model), tighten the locknut and
recheck.
7.
Remove the gauge.
P
YSTEM
RESSURE
™) or 2750 psi (S
A
DJUSTMENT
™).
UPERDUTY
Part #: 90309
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