Hydraulic Gear Pump; Jh9020 Hydraulic Flow; Leveling Control Manifold - Hillco JH7020 Operator's Manual

Hydraulic Gear Pump

The JH7020 has a Hydraulic Gear Pump (A)
that is mounted directly to the output shaft of the
combine's rear engine housing. It provides the
necessary hydraulic flow to operate the leveling
system's functions. The gear pump isolates
the leveling system's hydraulic flow from the
remaining combine's hydraulics.

JH9020 Hydraulic Flow

Hydraulic flow for the JH9020 leveling system
is supplied from the Deere pressure supply line
on the header height valve block (B). This valve
is located on the left side of the combine below
the cab. From this oil flows to the Hillco leveling
valve located behind the inspection door on the
operator's platform. Oil is returned from the
leveling valve to header height valve block.

Leveling Control Manifold

The leveling control manifold (C) is located
behind the inspection door on the operator's
platform. The operator electronically activates
the manifold by either pushing the manual
leveling buttons or having it in automatic mode.
The manifold diverts hydraulic flow to the
corresponding leveling cylinder to rotate the
chassis.
D-180215CMA01C
A
Hillco Technologies, Inc.
12
A - Gear Pump
B
B - Header Height Valve Block
C - Leveling Manifold
C
Sept. 2022