Hisun Axis 500 Speedo sensor

[Jim Willison]

Hello all

I have owned my axis 500 for almost 2 years and it has been a very good machine. Speedometer quit working the other day, orderd a new one and and installed it. The old one had a bunch of shavings on it, Didn't think much about it, Took for a ride and speedometer works as it should. Wiped the oil and shavings off the old one to see that the shavings were from the sensor itself. The end it all chewed up. I don't hear any noises or grinding, and a little hard of hearing anyway and machine is kind of loud. Any Idea's what may have caused this? Am a little worried about now and afraid to drive it.

[Ben1098]

I assume you replaced the speed sensor in the rear diff.  The sensor has inside the SS can a magnet and wound wire coil.  The end is "looking for" gear teeth as the axle turns---each tooth generates the pulses for the speedo circuit.  Chewed up end means the face of the sensor threaded in too deep and is rubbing on the sharp gear teeth......OR the diff is coming apart with the ring gear having radial movement  Pull the sensor and look inside the hole and have someone rotate a back raised wheel.....look for "wobble".  Inspect the "new" sensor face and check for damage.  Not having the sealing washer installed....sensor will thread in DEEPER......RUB/Scrub sensor face.  IF no new damage (scratches)  OR metal fragments stuck to the magnet, you should be good to go.  There are always some floaters the sensors magnet will pick up.  The key is if the new one is also chopped up.  Adding extra sealing spacer (with sealant) will space the sensor head back away from the gear teeth.  The oil supplied should be changed after breaking....seen failures when not replaced.  Hope this helps.  P.S.  If spaced too far from the gear teeth, the sensor won't see them and thus no speedo indication.