Hisun Sector 750 EPS- Valve adjustment at 20 hours

[Roadstar515]

I was wondering if anyone has found the valve adjustment, out of spec when they had them checked at the recommended first 20 hours.

If so, how hard is it to do on your own?

Rick

[aefron88]

I've read a couple people saying they found em out of spec from the factory. Just got my UTV recently and it's on my list here in the next couple weeks.

 

As far as tools should be easy: Allen wrench to pull the covers, 10mm box wrench for the lock nuts, a wrench for the adjuster, and a flat feeler gage set.

Pull the fan cover, pull the valve covers and spin it over check, and adjust as needed. The covers use an o-ring that should be reusable. Hardest part is going to be contorting my body to fit.

[Roadstar515]

Your right about trying to fit in there to adjust. That will be the hardest part I’m sure. Thanks for the reply

[Roadstar515]

8 hours ago, aefron88 said:

I've read a couple people saying they found em out of spec from the factory. Just got my UTV recently and it's on my list here in the next couple weeks.

 

As far as tools should be easy: Allen wrench to pull the covers, 10mm box wrench for the lock nuts, a wrench for the adjuster, and a flat feeler gage set.

Pull the fan cover, pull the valve covers and spin it over check, and adjust as needed. The covers use an o-ring that should be reusable. Hardest part is going to be contorting my body to fit.

What size and make is you UTV? Also how many hours on it. Manual says check at 20 hours.

[aefron88]

It's a coleman (hisun) 400. the engine/drivetrain & maine schedule seems to be identical to the 550/750s.

It's got a whole whopping 5 hrs on it. I had it for about 10 days before I had to go back to work on my ship. Be back home soon and planned on doing that and the first oil change in a couple more hours run time.

[Roadstar515]

Ok , yah I don’t think I need to pull the fan cover on mine but not sure yet until I dig into it. Haven’t given it a lot of thought on what’s involved yet seeing I’m don’t have enough hours yet.

[aefron88]

The fan cover is so you can spin the motor by hand to TDC. You need to be at TDC for both rockers to be loose to check the lash.

[Roadstar515]

Ok, that makes sense on being able to spin motor. I thought you would bump the starter to get there but your method would be more controllable. Thanks 

[aefron88]

You could try bumping the starter, but engines will have a natural tendency to stop before or after TDC since TDC has the highest resistance due to the compression. When you spin it over by hand you will be able to feel the resistance.

[Roadstar515]

Makes total sense. It shouldn’t be a big deal to perform. I’m looking forward in doing it instead of having to trailer it to a dealer and renting a trailer. Not looking forward in being a contortionist to gain access and visually seeing the adjustment locations. A mirror will probably help.