Curtis PB-6 Pot Box Throttle, 0-5k 2-Wire With Micro Switch
- Fits electric carts and conversions whose controller takes a 0-5k two-wire throttle
- 0 to 5k ohm 2-wire output with a built-in micro switch
- Lever arm links to the accelerator pedal by rod or cable
- Does not fit: carts with an E-Z-GO ITS inductive throttle sensor or a Club Car MCOR, which are different sensors
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Overview
A pot box is the throttle sensor on a cart with a solid state controller: a potentiometer in a metal case with a spring-loaded lever arm. The accelerator pedal moves the lever through a rod or cable, the resistance rises, and the controller turns that into smooth, stepless speed.
The Curtis PB-6 is the 2-wire version, with a 0 to 5k ohm output and a built-in micro switch. Curtis designed it to match the standard 0-5k throttle input on its 1204, 1205, 1209B, 1221 and 1231 series motor controllers, and it suits other controllers that take a 0-5k two-wire throttle.
It suits a cart being converted from stepped speed switches and resistor coils to a solid state controller, or a like-for-like replacement for a worn 0-5k pot box. The built-in micro switch means you do not need to fit a separate pedal switch.
Compatibility
Fits
- Universal by throttle type Electric carts and conversions whose controller takes a 0-5k two-wire throttle
- Voltage
- Not voltage specific
- Years
- Identify by controller
Links to the pedal by rod or cable
Does not fit
- Carts with an E-Z-GO ITS inductive throttle sensor or a Club Car MCOR, which are different sensors
- Controllers set up for a 5k-0 throttle input
- Controllers that need a 3-wire potentiometer throttle (use the Curtis PB-8)
- Installs where the lever has to swing the other way: the PB-6 is the right-hand version
- Gas carts
Not sure which throttle your cart uses? Send us the controller model or a photo of the pedal area and we will match it. support@golfcartlab.com
How to confirm it fits
Check your controller's throttle input: this pot box gives a 0-5k two-wire signal.
Check which way the lever has to swing when the pedal is pressed. The PB-6 is the right-hand version.
Compare the mounting space with the drawing: a 102 x 60 mm base with holes 89 mm and 32 mm apart.
Send us your controller model or a photo of the old throttle and we will check it for you.
What's in the box
- One Curtis PB-6 pot box with drilled lever arm, return spring and built-in micro switch
- Attached 2-wire throttle cable
Completes the install
Optional
Replacing the controller too? This one reads the same throttle type.
Specifications
- Curtis
- PB-6
- Pot box throttle: potentiometer with spring-return lever arm
- 0 to 5k ohms, 2-wire
- Less than 50 ohms
- 4500 to 5500 ohms
- 45 degrees
- Right-hand
- Drilled with a series of holes to match the pedal throw
- Built in, with common, normally open and normally closed terminals
- 1.5 mm (1/16 in.) of lever movement from the return stop
- 102 x 60 mm (4.0 x 2.37 in.)
- 89 mm (3.5 in.) apart along the base, 32 mm (1.25 in.) apart across it
- 52 mm (2.06 in.)
- New
Requirements and install notes
Disconnect the battery pack before you work on the throttle or controller wiring.
Mount the pot box so the lever arm lines up with the accelerator linkage. Pick the lever hole that turns full pedal travel into full lever travel.
Curtis requires a second return spring on the pedal in addition to the spring inside the pot box, so a single broken spring cannot leave the throttle full on.
Set a mechanical stop for the pedal about 1 mm (1/32 to 1/16 in.) before the lever reaches its own full-on stop. That keeps pedal force from bending the lever arm.
Connect the two throttle wires to the controller's two throttle terminals. On Curtis controllers it does not matter which wire goes on which terminal, and the wires can be extended.
Curtis says every vehicle should have a throttle-actuated micro switch. Wire the built-in one into the pedal switch circuit shown in your controller's wiring diagram.
Test with an ohmmeter across the two throttle wires: less than 50 ohms with the pedal up, rising smoothly to between 4500 and 5500 ohms with the pedal down.
Keep water and dirt off the pot box. Curtis notes that this avoids corrosion and electrical leakage.
FAQ
What is the difference between the Curtis PB-6 and PB-8?
Both are 0 to 5k ohm pot boxes with a built-in micro switch. The PB-6 has a 2-wire output and the PB-8 a 3-wire output. Choose by the throttle input on your controller: two throttle terminals for a 0-5k signal means the PB-6.
Can I use this to convert an old resistor cart to a solid state controller?
Yes, as the throttle part of the conversion. The pot box replaces the old speed switch assembly and connects to the pedal with a rod or cable. You also need a solid state controller that takes a 0-5k throttle, a solenoid matched to your pack voltage, and cables.
How do I test a pot box?
Put an ohmmeter across the two throttle wires. Curtis gives less than 50 ohms with the pedal up, rising smoothly to between 4500 and 5500 ohms at full pedal. A reading above 7000 ohms means the pot box is defective, and a Curtis controller shuts down when it sees it.
Will it replace an E-Z-GO ITS or Club Car MCOR sensor?
No. Those are different throttle sensors with their own connectors and signals. This pot box is for controllers that take a 0-5k two-wire throttle.
Warranty
This part is new and covered by our returns and refunds policy. We handle any claim for a defective part directly with you. Damage from a bent lever arm, water entry or incorrect wiring is not covered.
Manufacturer part reference
- Manufacturer part number
- PB-6
- GCL SKU
- 77-PB6
