Fort Lieutenant (USMCO2) - Cub Cadet 500 Challenger Reverse Issues

[Ransy]

So my wife surprised me with a Cub Cadet 500 Challenger. It was used, but in great shape. I have been wanting one for my VERY hilly farm up here in the Oregon Coast Range. 

It ran awesome until I hitched a lightweight road grader on and worked up the gravel of my private road: a hilly, 1/4 mile road that needs constant upkeep because of the rain. It started dogging-out and wouldn’t idle. Had it in the shop and was repaired. They told me there needed a spark plug change.
 

Now I’m having issues getting it into reverse. I might add, when I first drove it, I was befuddled that it had no clutch! Keep in mind I had nothing to go on before hand. My wife -- very loveingly -- just bought it and had it delivered one day a few months back. 
 

Any help provided will be humbly and greatly appreciated my 4-wheeling friends.

[Flyrider]

Make sure idle down and push hard on brake if necessary a couple times before going into reverse or park. Also it’s a high rpm low horsepower engine. For any kind of load like grading use low range to keep rpm’s up.  Also. Make sure your in neutral , stoped with rpm’sdown to go into 4wheel drive or lock differentials and then only go straight with locked differential.  This can be a high maintenance machine. Highly electronic, digital and perhaps overly complex.

[cliffyk]

Your Cadet Challenger 500 is a re-branded Hisun HS500--also sold as the Coleman UT500 and Outfitter 500--what model year is it?

There is a Service manual dated September, 2009 available in the Forum's download section (click here). It has a section with detailed instructions for adjusting shifter (curiously titled "The Reverse Mechanism"), see page 265...

-cliff-

[cliffyk]

Here's a pictorial connection diagram of the Hisun speed limiter "black box"--it should be under the hood up high somewhere (mine is right in front of the cowl near the brake reservoir (it is clearly silk-screen labeled "Speed Limiter"):

Both the "reverse" (pin 4)and seat belt (pin 5) connections are "active" low (ground) signals--just cut or otherwise disconnect either wire to disable that function. You could probably disconnect the speed input on pin 4 or ECU output signal  (pin 6)) to disable both.

[Patty]

We have a Buck UTV about one year old. It makes a loud whining sound when you accelerate, regardless of what gear. (We have carefully checked and replaced all fluids, twice since we got it. ) The noise persists. Any tips on what this is caused by?

[cliffyk]

2 hours ago, Patty said:

We have a Buck UTV about one year old. It makes a loud whining sound when you accelerate, regardless of what gear. (We have carefully checked and replaced all fluids, twice since we got it. ) The noise persists. Any tips on what this is caused by?

What specific model (year and engine size)?