John Deere RG5500 Lawn Mower User Manual


 
36
ELECTRICAL TROUBLESHOOTING (Continued)
Remedy
PROBLEM : Spin drive speed goes at one speed only.
Possible Cause
A. Check potentiometer wiring for
proper hookup. See that speed
pot is wired per electrical diagram
B. (SSP) 10K Remove 3 remote
speed wires.
red wire to term 2
white wire to term 1
black wire to term 3
C. Check all pot settings on both
boards as of the (SDC) shown
on Pages 25. (See Adjustment
Section Spin Drive Control [SDC]
Board Setting).
A. See adjustment section for
trim pot setting on Page 25.
B. Readjust bearing preload for
the reel. Maximum torque load 25
in./lb to rotate reel.
C. When .250 female spade
terminals are not tight, remove
and crimp slightly together. When
reinstalling, push on pressure
should have increased for good
contact.
If wiring is wrong, correct and
test.
Yes--end of troubleshooting
No--Go to Step B. next
Check for 10,000 ohms
Red wire to white wire
Full CCW--0 ohms
Full CW--10,000 ohms
Red wire to black wire
Full CCW--10,000 ohms
Full CW--0 ohms
Yes-- Go to Step C. next
No--Replace (SSP)
Yes-- end of troubleshooting
No--replace (SDC)
Original adjustment was not set
properly
Too much load on drive motor will
cause motor to hunt and vary
speed.
When connections are not tight
the control board varies voltage
to the DC motor which then
varies speed.
Wiring hookup to potentiometer
is improper. (If components
have been replaced)
Defective spin speed
control (SSP) potentiometer.
Main circuit board dial pot
settings not correct. (If board
has been replaced
IR Comp trim pot not adjusted
properly.
Torque to rotate the reel too
high.
Check all terminal connections
for tightness.
PROBLEM : Spin drive motor speed varies.