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8/25/2021

Taylor-Dunn C-432 Vehicle Controls

The information in this article applies to standard C-432 vehicles – model number C0-014-32. Note that vehicle customization may cause variation from the information in this article.

The Taylor-Dunn C-432 tow tractor is shown below.

C-432 vehicle

VEHICLE CONTROLS

C-432 vehicle controls

1. Start Switch: The start switch turns the vehicle electrical control system on. This switch may or may not require a key to operate.  

Rotate the switch clockwise to turn the vehicle system ON and counterclockwise to turn the vehicle system OFF. 

The vehicle will not run when in the OFF position. The switch should be in the OFF position whenever the operator leaves the driver’s seat. This switch is designed to secure and disable the vehicle. The key can only be removed when the switch is in the OFF position. 

2. Direction Control Switch: This switch determines the direction of travel.

The switch has three positions:  

  • FORWARD: Push the top of the switch all the way in to travel forward.  
  • REVERSE: Push the bottom of the switch all the way in to travel reverse.  
  • OFF: The center position between forward and reverse is the “direction” OFF position. The OFF position does NOT turn the vehicle control system off. Use the start switch to turn the vehicle control system OFF. Refer to Start Switch entry in this section for details on turning the vehicle control system off. 

3. Accessory Switches: The accessory switches are optional and may not be equipped on your vehicle. If equipped, toggle forward to turn the accessory ON. Toggle rear to turn it OFF. 

4. Hour Meter: The hour meter is optional. If equipped, the hour meter displays hours the vehicle has been in operation. Time accumulates only when throttle pedal is pressed. 

5. Horn Switch: Press the horn switch to sound the horn; release it to turn it off. 

6. Battery Status Indicator: There are two available BSIs, depending on how your vehicle was ordered. Detailed description of operation can be found in the next section.

The Battery Status Indicator has two forms: a bar graph or analog gauge. Both indicate the charge state of the battery.  

Battery Status Indicator: Bar Graph: The battery status indicator is located to the left of the hour meter. The battery status indicator has an LED bar graph that indicates the relative state of charge of the battery. The top LED will light when connected to a fully charged battery or after completing a charging cycle. Successive lower LEDs will light as the battery charge diminishes. When the second-to-bottom LED flashes, the battery energy status is in energy reserve and should be placed on charge as soon as possible. When the two bottom LEDs are alternately flashing, the batteries are empty and the truck should be taken out of service and charged to avoid damaging the batteries. The BSI will reset to fully charged only after a complete charge cycle is completed. A complete charge cycle is defined as battery voltage exceeding 2.35 volts per cell for a minimum of 6 minutes. 

C-432 battery status indicator

Battery Status Indicator: Analog: This gauge went into production July 2015. The gauge is a limited-range voltmeter indicating the current voltage of the batteries. The red zone to the left is voltage range V1, the green zone is V2, the white is V3 and the red zone to the right is V4. Refer to table below for range voltages. For a more accurate status, the vehicle should be idle and not used or charged for a minimum of one hour.  

Note: While being charged and in the time immediately after a charge cycle is completed, the battery voltage may greatly exceed the fully charged voltage per the gauge. 

State of Charge

Refer to the charts below for more information.  

Battery Status at 80 Degrees Fahrenheit 
  Discharged Fully Charged
24V System 21.18 volts 25.44 volts
36V System 32.22 volts 38.16 volts


Note: Battery voltage will vary with the temperature of the battery. Add 0.084 volts per battery for every 10° below 80°F and subtract 0.084 volts per battery for every 0° above 80°F.

  System Voltage
  24V 36V
V1 Range 16-20 30-32
V2 Range 12-24 32-36
V3 Range 24-30 36-40
V4 Range 30-32 40-42

OPERATOR CONTROLS

Steering

Steering

The steering wheel and steering system are like an automobile. To turn right, turn the steering wheel clockwise. To turn left, turn the steering wheel counterclockwise. 

Pedals

pedals

1. Throttle Pedal: The throttle pedal is located to the right of the brake pedal. It controls the speed of the vehicle and operates like the throttle pedal in an automobile.  Press the pedal to increase speed and release the pedal to decrease speed. 

2. Foot Brake Pedal: The foot brake pedal is located to the left of the throttle pedal. This pedal is designed for operation with the driver’s right foot. It works like the brake in an automobile. Applying pressure to the brake pedal slows the vehicle according to the amount of pressure applied. Relieving pressure from the pedal releases the braking action. 

3. Parking Brake: The parking brake is actuated with a hand lever, located on the floorboard. To set the parking brake, pull the handle back until it locks. To release the park brake, press the foot brake pedal and push the brake lever forward and all the way down.  

Note: The parking brake can be adjusted by rotating the knob on the end of the handle. 

Turn Signal Switch
The turn signal switch is optional. If equipped, the switch is a lever located left of the steering column.  

Push the lever forward to activate the right turn signal and pull the lever back to activate the left turn signal.  

The switch is not self canceling. You must return the switch to the center OFF position after the turn is completed. 

Hazard Light Switch 
The hazard light switch is located on the turn signal switch. The switch is a small tab or knob under the turn signal lever. 

To activate the hazard lights, pull the tab out. To turn the hazard lights off, push the turn signal lever forward or back. 

Interlocks 
Operator Presence Interlock: A switch located under the driver’s seat disables the power to the vehicle when the driver leaves the seat. The driver must be seated for the vehicle to operate.  

Whenever the driver leaves the vehicle, the driver should turn the key switch OFF and place the forward-off-reverse switch in the center OFF position.  

Warning: Do not dismount the operator’s seat while the vehicle is in motion. Getting off the seat will activate the Operator Presence circuit, rapidly slowing the vehicle and applying the park brake. The abrupt slowing of the vehicle may result in severe bodily injury. 

Built-In Charger Interlock: The built-in charger interlock is optional. If equipped, the charger interlock is designed to disable the vehicle from being driven while the AC charging cord is plugged into a functioning power source. This interlock is located inside the charger cabinet. 

For more information, refer to the Vehicle Operator and Service Manual.  
To service your vehicle, see an authorized Taylor-Dunn Dealer. To find a dealer near you, use the Dealer Locator.  

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