MacDon M155 Operators Manual - Manual (Page 382)

MAINTENANCE AND SERVICING
Table 5.19 Header Hydraulic Pressures
Header
Model
Application/System
Windrower Absolute
Pressure Limit Setting
psi (kPa)
Suggested Overload
Warning Setting
psi (kPa)
R-Series Disc Pressure 4200 (28,958) 4000 (27,579)
Reel/Draper Pressure 3200 (22,063) 3000 (20,684)
D-Series
A-Series
Knife/Conditioner
Pressure 4200 (28,958) 4000 (27,579)
If lift and drive capacity problems develop, the pressure compensator valve may require adjusting. Contact your
MacDon Dealer or refer to the technical service manual for your windrower.
Flow Control Blocks
Two hydraulic valve blocks with multiple cartridges are
used for the various windrower functions and are controlled
by the windrower control module (WCM) according to the
inputs from the Operator. The valve blocks are located
behind the left cab-forward side 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 MacDon Dealer.
Figure 5.203: Hydraulic Valve Blocks
Adjusting Header Drop Rate
The header should lower gradually when the lower header switch is pressed. From full height to ground should
take approximately 3–4 seconds.
If drop rate is too slow, return to cut height or tilt or float presets may time out. This is to keep the hydraulics from
being pressurized.
DANGER
Stop engine and remove key from ignition before leaving operator's seat for any reason. A child or even a
pet could engage an idling machine.
1. Lower header to ground, stop the engine, and remove
the key.
2. Move left cab-forward side platform rearward. Refer
to 5.5.1 Opening Platforms (Standard Position), page
269 .
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Revision A