MAINTENANCE/SERVICE
Traction Drive: Hydraulics
TRANSMISSION
OIL
PRESSURE
Warning light and buzzer
In
cab
will
be
activated
when ignition switch is turned ON if transmission
oil pressure is below approximately 40 psi (275
kPa)
. Do not drive the windrower until light
and
buzzer
go
off. If light and buzzer stay on after
engine starts.
or
if
they
activate during operation,
shut engine off and check hydraulic oit
level
at
reservoir. If oillevef is adequate,
measure
charge
pump
pressure as described below.
CHARGE
PUMP
PRESSURE
The charge pump provides hydraulic power to the
traction drfve.
To
check
charge pump pre
ss
ure:
1. Remove wiring from
aD
pressure switch near
hydraulic oil filter at right
side
of engine
compartment Remove switch
(A)
from cross
fitting.
2. Attach a a -
600
psi
(4000
kPa)
pressure
gauge
to a hose that
Is
long enough to allow pressure
gauge
to
be
read from the operator's seat
Attach hose
to
the cross fitting
(A)
(1/4
NPT).
3. Start engine and move throttle
lever fully
forward. Pressure should
be
90
to
150 psi (620
to
1000 kPa).
4. If pressure
Is
not within this range, back
pressure relief valve
(8)
at
reservoir is defective.
To
replace relief valve, it will be necessary to
drain hydraulic oil. See -Changing Hydraulic
on-
on
page 85.
ATTACH
HOSE
FROM
PRESSURE
GAUGE
--
CHECK
V~VE
AT
RESERVOIR
CONTROLS
CHARGE
PUMP
PRESSURE
94
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