MAINTENANCE/SERVICE
Header Drive: Hydraulics
HEADER
DRIVE
RELIEF
PRESSURES
Auger
Header
To check relief pressure
at
flow control relief valve:
1. Disconnect hydraulic line
at
port ·
s·
or
port "A"
as marked on header drive flow control
(B)
.
2.
Attach a 3000 psi
(20
MPa)
pressure gauge
to
a hose that is long enough
to
allow pressure
gauge
to
be
read from the operator's seat.
Attach hose
to
port ·
s·
or
·A" and position the
gauge near the seat.
3.
Start engine and move throttle lever
to
half of
maximum engine speed. Move header clutch
lever forward
to
engaged position briefly.
IMPORTANT
: Engage header clutch just long
enough
to
accurately read pressure.
4. Pressure should be 2000 psi
(13
.8
MPa}
.
If pressure is not as specified, proceed with
adjustment:
5. Move header clutch lever rearward
to
dis-
engaged position. Shut off engine and remove
key.
6. To adjust relief setting:
• Remove cap nut at relief valve
(C)
.
• Turn the adjustment screw in 1 / 8 turn
increments, clockwise
to
increase relief
pressure, counter-clockwise
to
decrease.
7. Repeat checking and adjustment procedure
until relief pressure is correct.
HEADER
DRIVE
FLOW
CONTROL
96
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