Gradall 544D (9136-4003) Service Manual - Manual (Page 67)

Ordering Example For Inlet Covers
*Specify:
Model number of relief valve to be used.
Relief setting required. Crack pressure is setting
when relief is passing 1 GPM [3.8 litres/min.]. Full flow
is pressure setting when relief is passing specified
GPM [litres/min].
“NR” (no relief) if plug is to be installed.
If “With no relief assembly or NR plug installed” is
specified, relief cavity will be plugged with only a
plastic shipping plug.
OUTLET COVERS
A choice of two outlet covers for the Model V40 is
available: top outlet, part no. 8090-; and end outlet, part
number 20931.
Top Outlet Cover, Part No. 8090
Standard machining provides a top outlet port for open
center applications. When the top outlet port is plugged
to provide turnaround outlet flow, the outlet port must be
located in the inlet cover.
Two options are available for the No. 8090 top outlet
cover . . . power beyond and closed center applications.
For power beyond, the core between the open center
and exhaust passages is tapped and plugged. The top
outlet port becomes the power beyond port. The tank
outlet port must be located in the inlet cover. When the
Basic Casting
Part No.
Machining
Modification
Number
Relief Valve
Details*
1.
2.
3.
4.
top power beyond port is plugged, the Valve Assembly
may be used in a closed center application.
For future field conversion from standard open center to
either power beyond or closed center applications, the
outlet cover may be ordered with the core tapped but
not plugged.
Options For the No. 8090 Outlet Cover
Standard Machining for Open Center
Power Beyond Option
Use the following porting chart to determine the
proper machining modification number for the No.
8090 outlet cover.
3-3