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3/16"
Part #: 90309
W
C
ORK
IRCUITS
The circuits have been listed from top to bottom as they appear
in the valve bank assembly.
Note: The following list is for the commercial front loader
?
only. See following section for residential
configuration.
1.
Hopper Top Door Circuit: The hopper top door circuit
includes one double-acting hydraulic cylinder and two flow
restrictors.
2.
Tailgate Circuit: The tailgate circuit consists of two
double-acting hydraulic cylinders, one lock valve and two
flow restrictors.
3.
Arms Circuit: The arms circuit consists of two
double-acting cylinders and a deceleration valve.
4.
Forks Circuit: The forks circuit consist of two
double-acting cylinders.
5.
Pack/Return Circuit: The pack circuit consists of two
double-acting, 3-stage cylinders, a pilot operated check
valve and a pressure switch.
A
U
RMS
P
The arms up deceleration valve automatically decelerate the
arms as they are raised to the dump position. A cam bolted to
the arm pivot tube rotates as the arms are raised and gradually
depresses the valve spool, reducing the flow of oil exiting the
tube end of the arm cylinders.
Note:The deceleration valve greatly reduces impact on the
arm assembly, body structure, and hydraulic
components.
Location:
Fitted to the underside of the body, behind the arm pivot tube on
the curbside.
Adjustment procedure:
1.
Raise the arms up until they rest on the arms stops.
2.
Position the cam so it depresses the spool of the
deceleration valve until there is approximately 3/16 inch
(4.75 mm) of the spool still exposed.
3.
Tighten the retaining bolts of the cam.
D
ECELERATION
V
ALVE
65
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