Reelmaster 7000
Page 5 -- 32
Electrical System
Reel Speed Potentiometer
The reel speed potentiometer controls the cutting reel
speed. The TEC controller uses the potentiometer set-
ting as an input to determine the necessary voltage out-
put for the hydraulic mow control manifold proportional
valves (SP1 and SP2) for correct cutting reel speed. The
reel speed potentiometer is located under the operator
seat (Fig. 44).
Testing
1. Park machine on a level surface, lower cutting units,
stop engine, engage parking brake and remove key
from the ignition switch.
2. Raise and support operator seat to gain access to
reel speed potentiometer.
3. Carefully unplug wire harness connector from reel
speed potentiometer.
4. Remove screw that secures potentiometer to ma-
chine and remove potentiometer from machine for test-
ing.
NOTE:
Prior to taking small resistance readings with a
digital multimeter, short the meter test leads together.
The meter will display a small resistance value (usually
0.5 ohms or less). This resistance is due to the internal
resistance of the meter and test leads. Subtract this val-
ue from from the measured value of the component you
are testing.
5. Using a multimeter, measure resistances between
potentiometer terminals as follows (Fig. 45):
A. Verify that resistance between terminals B and C
is approximately 5000 ohms. Record measured re-
sistance.
B. Measure resistance between terminals A and C
and then measure resistance between terminals A
and B. Record these resistances. The total of the two
measured resistances should be approximately
5000 ohms.
C. Rotate the reel speed potentiometer to other set-
tings and repeat step 6. The total of the two resist-
ances should consistently be approximately 5000
ohms.
D. If measured resistances are incorrect, replace
reel speed potentiometer.
6. After testing is completed, secure potentiometer to
machine frame. Secure wire harness connector to po-
tentiometer. Lower and secure seat.
1. Reel speed potentiometer
Figure 44
1
1. Terminal A
2. Terminal B
3. Terminal C
Figure 45
1
2
3
Summary of Contents for Reelmaster 7000
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Page 10: ...Reelmaster 7000 Page 1 6 Safety This page is intentionally blank ...
Page 12: ...0 09375 Reelmaster 7000 Page 2 2 Product Records and Maintenance Equivalents and Conversions ...
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Page 36: ...Reelmaster 7000 Hydraulic System Page 4 2 This page is intentionally blank ...
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Page 247: ...Reelmaster 7000 Page 7 3 Chassis This page is intentionally blank Chassis ...
Page 264: ...Reelmaster 7000 Page 7 20 Chassis This page is intentionally blank ...
Page 271: ...Reelmaster 7000 DPA Cutting Units Page 8 7 This page is intentionally blank DPA Cutting Units ...
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Page 306: ...Reelmaster 7000 Foldout Drawings Page 9 2 This page is intentionally blank ...
Page 310: ...Page 9 6 Reelmaster 7000 Main Wire Harness ...
Page 312: ...Page 9 8 Reelmaster 7000 Seat and Console Wire Harness ...
Page 314: ...Page 9 10 Reelmaster 7000 Power Center Wire Harness ...