Drive Motor System Function; Electrical Diagram - Clarke Clean Track® L24 56317170 Service Manual

Drive Motor System Function

See Figures 17 and 18. With the Key Switch S1 closed, the BRN wire inputs 24V to the A2 speed controller (pin
5-KSI) to make its internal control circuits operational (powering it up). The CB2 circuit breaker (30-Amp) supplies the
positive load circuit voltage input to the B+ controller terminal (WHT/YEL wire). The black wire from the battery negative
standoff supplies the negative input to the B- controller terminal.
Moving the 5K Ohm R1 pot off its centered balanced neutral setting of approximately 2500 Ohms, activates the
operator input to the speed control. Forward or Reverse movement of the drive paddle rotates the pot shaft, and the
pot's variable resistance values are changed which generates the internal voltage signals (0-5 Volts) needed for the
controller's output operation. These control board voltage input signals are what energizes the Forward and Reverse
directional relays, which then select the motor polarity and final voltage level outputs at the M1 and M2 terminals.
When the operator turns the R2 speed limit Pot from min. to max. (CW) this causes an input resistance relationship
change between the pot high (+) and wiper terminals (high to low Ohms), thus increasing the maximum wheel motor
operating speed range. Turning the knob (CCW) increases the resistance and the motor speed range is reduced.
Figure 17
RED
Fuse, 150 A
CB1
GRN BRN/WHT
x
Circuit Breaker, 10 A.
A2 1228 Speed
BRN/BLK
M1
M8
- + YEL/RED
M
M2
Motor, Wheel Drive
Pin 18 - Spd Limit Pot
CB 2
RED WHT/YEL
B+
x
Circuit Breaker, 30 A.

Electrical Diagram

*For a complete description of all callouts see the Electrical Wiring Diagram/Schematic.
48 - Form No. 56043161 - Clean Track
F1
RED
Onboard
Battery Charger
RED
B+
GRN
Interlock
BRN/WHT
S1
Switch, SPST Key
Control
BRN
Pin 5 - KSI
ORN/BLU
Pin 9 - Status
RED/BLK
Pin 6 - Brake (-)
BLU/BLK
Pin 16 - REV
WHT
Pin 13 - Pot Low
BLU
Pin 4 - Pot Wiper
BLK
Pin 3 - Pot Hi
R1 Pot. 5K Ohm
BRN
BLK
B-
L24
®
BT1
BLK
+ -
A1 Control Board
J2-4
+
B+ Unswitched
BRN J2-8
+
B- Switched
J1-7
Status
J1-8
For./Rev.
J1-9
Reverse
J3-13
Pot Low
2
3 1
J3-14
Throttle
Pot Hi
J3-12
SLP Output
J2-5
BLK
Ground
J2-6
BLK
Ground
J2-7
BLK
Ground
J3-11
BLK
Ground
J3-2
BLK
Ground
J3-10
PINK
Driver Pot High
J3-6
BRN
Driver Pot Input
J3-4
GRA
Driver Pit Low
1
2
3