1999 txt series cart

[busman9]

We have a 1999 series cart with all stock parts except cables and the cart has been lifted with 25 in tires. On flat ground it still goes fine but going up a hill or the ramp on the trailer it will not go. The axle nuts do not spin so I am guessing the hubs are OK. Pack voltage is 38.2 and drops to 34.8 when trying to pull the ramp. Please direct me to the proper test...Thanks.

[JohnnieB]

With stock height tires and a stock controller, your cart is only rated to climb a 14° incline and with 25" tires, it loses 28% of its stock torque where the rubber meets road.

Your batteries are only dropping to 1.93VPC (Volts per Cell), so the amps being drawn from them is relatively low for a stalled motor.

A stock controller will only pass 275A to the motor, but I don't think the motor is drawing that much. Are any cables or connections getting hot?

With 25" tires, you need at least a 400A controller.

[busman9]

Johnnie,We lifted this cart 2 years ago and it has been fine. Can you tell me how to test the controller output to see if the controller is getting weak. Thanks

[cgtech]

Clip your test leads to the B+ and B- terminals at the motor controller, test at full throttle on a slight incline that it will climb, record voltage. Move test lead from B- terminal to M- terminal, repeat test as close to exact same as possible and record voltage. If the second voltage is more than about 2v different, the controller is not doing a very effective job at delivering amps to the motor, or the motor has a problem and is using more amps than normal.

[busman9]

pack voltage38.4 all batteries 6.3 to 6.4
B- to M- 38.2 V when solenoid clicks and close to 0 at full throttle
white wire in spec

I hooked the meter to M- and pack ground and m- drops to 24.3V with heavy accel and there is no load because it is jacked up. Seems wrong? The cart has a Alltrax stock replacement controller in it,I have a Curtis 2586G03 controller. If you guys think the controller is going bad can I use this one for a test controller? Thanks

[cgtech]

NEVER run the motor at full speed with no load (jacked up). The test i suggested was intended to be done while driving (under load). But given the limited data i have, i would remove & inspect the motor.

[busman9]

It was a quick accel and did not run wide open. The controller has a LED light on it so can I put the controller in diagnostics and see if it flashes a code when it acts up?

[cgtech]

The stock controller doesnt typically have a led, unless its a 48v sepex specialty vehicle. Post a pic?

[busman9]

It is a Alltrax stock replacement that was on the cart when we got it. It has the green light but I do not know how to put it in diagnostic mode. Thanks

[JohnnieB]

Originally Posted by busman9

It is a Alltrax stock replacement that was on the cart when we got it. It has the green light but I do not know how to put it in diagnostic mode. Thanks

It is always in diagnostic mode.

Here is the page about what the LED is telling you.