FORM NO. 56043071 CMAX
™
28/34ST / I-MAX
™
28/32C, BA 750/850ST, BA 750C -
51
WHEEL DRIVE SYSTEM
GRA
RED/BLK
RED/BLK
Wiper output to
speed control
(pin #5)
Wiper input
from R1
S
T
V
FRONT
U
Q
FRONT
R
P
BLK #1
BLK #2
GRN/YEL
3
High
1
Low
2 Wiper
5
Reconnect the ohmmeter test leads to the pot wiper and low terminal connections and adjust (turn the pot) to obtain half of pot’s total
resistance. This will accurately set the true neutral drive paddle operator position.
6
Tighten the anchor nut secure. Note: Do not turn the potentiometer shaft when tightening. Reconnect the battery connector and turn the
key switch on and test the drive system for proper FWD and REV operations. Note: The dash panel maximum speed control knob should
be turned to the full speed position for testing.
25K WHEEL DRIVE SPEED LIMIT POTENTIOMETER TESTING
WARNING!
Disconnect the battery connector before servicing.
Note: The potentiometer (pot) should be removed from the handle housing to easily test.
FIGURE 9
FIGURE 11
FIGURE 10
POTENTIOMETER INSTALLATION AND ADJUSTMENT (CONTINUED)
1
See Figure 11. Remove the Set Screw
(S)
(5/64"
wrench) and pull off the Adjustment Knob
(T)
from
the stem of the pot.
2
Remove the rear electrical access panel secured
with (6) Screws
(U)
.
3
Remove the pot’s anchor nut (1/2 inch wrench)
then pull the Pot
(V)
and wires out from the
electrical compartment.
4
Observe the proper wire colors and their correct
terminal connections to re-assemble.
5
Disconnect all three wires and test the potentiom-
eter
(V)
using an ohmmeter. The specification is
25,000 ohms. Connect the meter leads to each
of the outside connections on the potentiometer,
should read approximately 25,000 ohms. Next,
take one of the test leads and connect to the
middle terminal, then turn the stem both direc-
tions. The resistance value will change (vary)
increasing and decreasing through its full range
of 0-25,000 ohms and 25,000-0 ohms approxi-
mately. If you do not get similar readings replace
the potentiometer.
Содержание BA 750/850ST
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