MAINTENANCE/SERVICE
Form # 169304
144
Model Year - 2009
7.11.5
Header and Reel Hydraulics
7.11.5.1 Pressure Compensator Valve
The pressure compensator valve is pre-set to be
sufficient for all header sizes and options. See
table below.
When the system operating pressure
approaches the compensator valve setting, a
warning tone sounds on the CDM, indicating a
potential overload on the header drive. If
operation continues, and the pressure reaches
the setting, the compensator valve is activated.
The header drive will begin to slow down to
avoid overheating the drive pumps. Reduce the
ground speed to maintain the correct system
load and header drive operation.
NOTE
The warning tone is normal when the
operating pressure is very close to the
compensator valve pressure setting.
If lift and drive capacity problems develop, the
pressure compensator valve may require
adjusting. Contact your Windrower Dealer or
refer to the Technical Service Manual for your
Windrower.
HEADER MODEL
APPLICATION/SYSTEM
SUGGESTED OVERLOAD
WARNING SETTING
psi (kPa)
TRACTOR PRESSURE
COMP SETTING
psi (kPa)
D60 & A40D
Reel/Draper Pressure
3000 (20684)
3200 (22063)
D60 & A40D
Knife/Conditioner Pressure
4000 (27579)
4200 (28958)
7.11.5.2 Reel/Conveyor Flow Control Block
Two hydraulic valve blocks control the reel and
conveyor functions, and are controlled by the
Windrower Control Module (WCM) according to
the inputs from the operator. The valve blocks
are located behind the maintenance platform.
The valve blocks do not require any scheduled
maintenance other than to check for leaking
fittings or loose electrical connections. If service
is required, contact your Windrower Dealer or
refer to the Technical Service Manual for your
Windrower.
7.11.5.3 Knife Drive Valve Block
The ON/OFF valve on the valve block regulates
the knife speed, and is mounted on top of the
knife drive pump. The flow to the knife drive is
mechanically set on the pump itself.