Ring Gear
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Ring Gear

 
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Ring Gear - 8/28/2008 9:24:46 PM   
atv gooroo


Posts: 36
Joined: 8/8/2008
Status: offline 		I am currently trying to fix my awd drive for the last time.  I have been in this thing three times.  Everything looks great but I do have one question.  I read in hear that flat spots on the ring gear could cause unwanted engagemant, is this on the inside?  I have two little wear humps inbetween each ramp on the inside of the ring gear and are they supposed to be there or is it to be smooth?  I  also would like to know if it will be okay if I could save some money and carry it the the machine shop and let them smooth them out a bit because I feel that this will be okay as  long as the rollers don't have room to come out and the ramps don't get changed.  How exactly would you know if the a-plate was magnatized?  I mean would it pick up paper clips and stuff?  I do have the newer style a-plate.  (04.5 Sportsman 500HO)

_____________________________

04 Sportsman 500HO
2 inch lift, 26 inch mud lites,
Black and white primary spring,
K&N filter.
Post #: 1
RE: Ring Gear - 8/29/2008 12:44:45 AM   
Lokimack


Posts: 723
Joined: 3/3/2007
Status: offline 		Yes the flat spots form on the interior of the ring gear. The external cam in the ring gear should be smooth with no signs of excessive or uneven wear. If there is too much play between the rollers and the ring gear you can have intermittent or undesired engagement. Failure to remedy the problem can lead to a broken cage or a cracked ring gear; yes they can crack, I have one in the garage with a definitive crack in the A-plate side. You can try the machine shop route, after all its not like you can ruin it. Although I would swap the A-plate out to be certain that the ring gear is the culprit. You can tell if the A-plate is magnetized by taking the diff apart and try to spin the A-plate by hand while it is installed in the cover plate assembly. If it turns easily without effort it is not magnetized. However, if you have to use much force at all to turn it then it is magnetized and needs to be replaced. I replace them every time anyway as they are a $15 item and I dont want to have to crack the diff again over 15 bucks. 

_____________________________

Loki
'05 Arctic Cat H1
Snorkeled
Jetted, Drilled & Clipped
27" Mud Machine Bi/Tri Magnums

(in reply to atv gooroo)
Post #: 2
RE: Ring Gear - 8/29/2008 5:45:02 AM   
atv gooroo


Posts: 36
Joined: 8/8/2008
Status: offline 		Thanks for the quick reply.  I would like to know where and maybe what part # do you get the A-plate for 15 dollars because when I bought mine last year it cost me about 60.  The ring gear looks really good except for the little flat spots on the inside and I think that I am going to try and let the machine shop smooth it out and give it a test.  I am going to take a socket and drill a hole in it so that I can slip it on over the output pinion shaft, then put the pin through it and hook up my impact wrench and test before I install in the machine.  I will say that I finally understand how this thing works.  When the roll cage drags, the rollers run up that ramp and wedge on the shafts locking everything together, so any little bit of drag will cause the engagemant.  I am now wondering if the flat spot that the rollers are sitting in cause any trouble at all.  When the rollers "release" they should go back to the middle of the ramps anyway and should just ride along on the shafts untill there is drag on the cage again.  So what is causeing the drag?  I forgot to mention that the little bearing that goes inbetween the two shafts was a little bent from me having a hard time removing from the first rebuild and I am going to replace that too, but I wouldn't think that would be the culprit eather.

_____________________________

04 Sportsman 500HO
2 inch lift, 26 inch mud lites,
Black and white primary spring,
K&N filter.

(in reply to Lokimack)
Post #: 3
RE: Ring Gear - 8/29/2008 1:21:02 PM   
Lokimack


Posts: 723
Joined: 3/3/2007
Status: offline 		Get the parts from John Deer

P/N MIA 10656 A-plate $17.00

P/N MIA 10663 Thrust Bearing $6.17

P/N MIA 10664 Clutch (ring gear) $272.95

The "drag" is caused by a 12volt current being applied to the coil in the cover plate assembly. The coil magnetizes and attracts the A-plate which in turn provides resistance to ther cage from turning freely causing the external cam (ring gear) to over rotate on the cage and rollers forcing them into a bind between the output hub shafts and the ring gear. Once the rear wheels gain traction, because the rear gearing is higher than the front gearing, the rear wheels will "over run" the front thereby releasing pressure off the cage and rollers and causing the assembly to return back to its neutral state until the rear wheels spin again and the process begins all over. If the 12 volt charge is removed then all the resistance is taken away and the rollers should be allowed to return to the neutral position. The wear in your ring gear COULD be causing your problem depending on how bad it is. The only real way to test it out is to put it together and try it. Also, only put 5 ounces of Polaris Demand Drive fluid in your diff. 



_____________________________

Loki
'05 Arctic Cat H1
Snorkeled
Jetted, Drilled & Clipped
27" Mud Machine Bi/Tri Magnums

(in reply to atv gooroo)
Post #: 4
RE: Ring Gear - 8/30/2008 5:18:02 PM   
atv gooroo


Posts: 36
Joined: 8/8/2008
Status: offline 		Well I got everything back together and all is fine.  I cleaned up the ring gear at the machine shop, cleaned up the inner axles with some emry cloth for the rollers have made little dents in them,  checked the armature plate by pluging it up and then cutting the awd switch on and off and it was kind of sticky so I took the original A- plate that came with the hillliard(old style) and took some advice from some one on the forum and took a 3/8  bolt and beat little dents into the a-plate and then straighted it out with the vice,  I then tested it and it freed up as soon as I cut the swiitch off.  I got everything back together and went to start the bike and I forgot to cut the switch off from when I was testing the A-plate yesterday so I went and snatched the battery out of the wifes and lifted the bike in the air and hit the gas and only 2 wheels spun.  I am so happy to have fixed this thing but at the same time am still scared to really get down on it.

_____________________________

04 Sportsman 500HO
2 inch lift, 26 inch mud lites,
Black and white primary spring,
K&N filter.

(in reply to Lokimack)
Post #: 5
RE: Ring Gear - 8/30/2008 9:47:21 PM   
Lokimack


Posts: 723
Joined: 3/3/2007
Status: offline 		Never heard of the 3/8 bolt trick before. Will be interesting to see if there are any side effects to the process. Not sure I would recommend it as you are risking a $260 cover plate to save a $17 A-plate because the A-plate rides against the coil in the Cover Plate and the coil is not serviceable. Good luck.

< Message edited by Lokimack -- 8/30/2008 9:52:07 PM >

_____________________________

Loki
'05 Arctic Cat H1
Snorkeled
Jetted, Drilled & Clipped
27" Mud Machine Bi/Tri Magnums

(in reply to atv gooroo)
Post #: 6
RE: Ring Gear - 8/31/2008 10:45:57 PM   
atv gooroo


Posts: 36
Joined: 8/8/2008
Status: offline 		Yes it does but the coil is housed in side a little cup so the a-plate does not actually run against to coil itself.  I could't have bent it but so much do to the fact of the small amount of gap that I have to play with, because if you bend it to much it will be to tight and have to much drag.

_____________________________

04 Sportsman 500HO
2 inch lift, 26 inch mud lites,
Black and white primary spring,
K&N filter.

(in reply to Lokimack)
Post #: 7
RE: Ring Gear - 9/1/2008 6:45:42 PM   
Lokimack


Posts: 723
Joined: 3/3/2007
Status: offline 		I know exactly how the A-plate is situated in the housing. My concern would be IF the dents are raised enough to get down into the groove that the coil is in and damage it. Here again I, personally, would not risk it except in the case of a emergency repair; due to the relatively low cost of a new part but this is your rodeo and you can caddle your horse however you like.  

_____________________________

Loki
'05 Arctic Cat H1
Snorkeled
Jetted, Drilled & Clipped
27" Mud Machine Bi/Tri Magnums

(in reply to atv gooroo)
Post #: 8
RE: Ring Gear - 9/2/2008 6:35:16 AM   
atv gooroo


Posts: 36
Joined: 8/8/2008
Status: offline 		10-4! 

_____________________________

04 Sportsman 500HO
2 inch lift, 26 inch mud lites,
Black and white primary spring,
K&N filter.

(in reply to Lokimack)
Post #: 9
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