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By paul allen
right front axle cv joint boot keeps getting torn up from the inside out....the stock one was damaged from a stick...i have replaced the axle 4 times with aftermarket axles that fit fine..after 4-5 miles of riding even on grass.the outer boot get torn up from the inside out...all 4 brand new alxes...bearings are fine nothing bent everything fits just fine....nothing seems to be binding.....any thoughts?????
thanks...pa
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By Andy Dickerson
So heard the grinding noise on the drive shaft a couple of times while going down a steep hill. Never heard this before going down the same hill. I already knew about the splines wearing out because of improper heat treating so I went through the process of removing the shaft to just replace it. A lot things need to be removed to get that thing out. Once I had it remove I didn't see any wear on the splines but what I did notice was the rear spline to rear differential had ZERO grease i.e. it was completely dry and I could see rust that had developed on the shaft splines and inside the differential mating surface. The front of the shaft where it connects to the transmission was well greased. Both ends of the shafts have springs in them with the rear spring being multiple times heavier which would force the shaft to mate securely into the transmission. Unless of course the rear is rusted and starts sticking which is what I think was happening. If the rear splines begin to rust and it starts sticking and the spring doesn't have the enough force to overcome the sticking because of the rust, the shaft will not get fully seated into the transmission. If this starts happening frequently it will eventually eat up the front splines on the transmission side shaft splines which is exactly what I see in the pictures of stripped splines.
I don't know why the rear spline shaft wasn't greased but this would cause it to eventually stick. I have been concerned about this ever since reading about it so as soon as I heard the grinding I stopped driving it. Thankfully there wasn't any wear. I'm wondering if this was deliberate or just laziness by the assemblers. It makes no sense not to grease it. The repair manual that I purchased from motorcycle doctor specifies to grease the splines. Both shaft ends have a rubber seal meaning there's is supposed to be grease in there.
I used to have a gold wing and there is a special grease required for the rear drive differential which happens to be a spline shaft setup. They use a lithium grease with moly. I had purchased a couple of tube of Magnalube-gx that I never used as I sold the bike. The Hisun manual recommends using a lithium grease which doesn't have the additives of a lithium moly grease that is specialized for spline shafts. Per magnalube website. "Magnalube-GX, however, uses a proprietary matrix of advanced polymers, molybdenum disulfide, and PTFE, so it stays where you put it without getting pressed out, while also maintaining a low frictional drag."
Anyway, long story short everything is back together and no noise. I would recommend those that haven't checked the grease in the splines on both ends to do so before the shaft get destroyed. Especially If you have heard grinding. Those rubber boots can be pulled back without having to take to many parts off. If you've been hearing grinding then there is probably significant wear already and time to replace the shaft and grease it properly.
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By Bedlam
Hello,
I have a 2019 Landmaster 550 UTV. Its been running good until now. The front axle wont engage. Where I live the temps have been well below freezing. The UTV is stored in unheated garage. And even the bottles of stored windshield washer fluid are frozen solid. So I am thinking that the front axle gear oil might be VERY thick and now allowing it to engage. Off the front diff is a small gauge wire running up to a connector. I put a test lamp to one of the leads and with utv running and 4 wheel switch on there is no voltage. However if I shut it off and have the 4 wheel switch engaged. and the crank it to start again the light gets a signal. for a second or two. I have to jacked up on rear and front and sometime the front will cut in and spin a few revs but the drops off.
Im hoping that someone can explain how the front engages on the axle. I assumed there was a fork or something that was engaged with 12 volts. But this wire is very small .This unit doesn't have a central fuse panel but I believe I have checked all the fuses.
Thanks in advance
Allan
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By Rocahaja
Dumb question probably but what size drive chain is used on Massimo gunner 250? I believe it to be 520 but not sure. Thanks for helping
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By TimsBrickHouse
DO NOT BUY ANY THING FROM HISUN Period! I had the axis 700 for 2 months when a rat or squirrel ate both wiring harnesses. (Main & ECM)Wanna know why? Because the manufacture of these things in their infinite wisdom use either, a soybean oil or a peanut oil to run the wires through the the wire loom. Hmmm i wonder why they would be inclined to eat the wires. So now I have $10K machine that I've only had for 2 months when all this happened and they will not warranty it at all. It is going to cost me $800 to $1000 to get this fixed. Here is a link to a video showing where we took our Hisun notice how many are there:
https://photos.app.goo.gl/2FdniAoCyvTJMKae7
So counting mine, there are 16 of Hisun Axis on the lot that i took in for authorized dealer, with the exact same problem, plus other troubles that the mechanic explained to me. This particular place told me they are not going to work on them anymore. I will be posting this in as many places as possible to reach the masses. I hope its worth Hisun!
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