MacDon PW8 - Manually Checking Voltage Range

214658 75 Revision A
Manually Checking Voltage Range
In some combines, output voltage range of auto header height control (AHHC) sensors can be checked from the
cab. For instructions, refer to the combine operator’s manual or AHHC instructions later in this document.
1. Position the header until the header wheels are approximately 150 mm (6 in.) above the ground.
NOTE:
Ensure float spring is fully extended. If float spring is not fully extended during next step, voltage may go out of
range during operation causing a malfunction of AHHC system.
2. Shut down combine. Position key so that power is supplied to sensors.
3. Open left endshield. For instructions, refer to 3.3.1 Opening Left Endshield, page 20.
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A
B
C
Figure 6.2: Left Height Sensor
4. Locate left height sensor (A).
NOTE:
Sensor and connector may not be exactly as shown.
5. With connector plugged into sensor, measure voltage
between orange signal wire (B) in middle position on
connector, and the brown ground wire (C) at one side of
connector. This is the maximum voltage for the left
sensor.
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A
Figure 6.3: Right Access Panel
6. Locate access panel (A) on inside of right end frame.
PREDELIVERY INSPECTION