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850 Hub Bearing Torque..

1058 Views 18 Replies 9 Participants Last post by  crazyflyboy30
My son asked me, when he had the wheels off of his '22 850 Ultimate Trail Sportsman to mount up a set of new CAMSO tracks, what the torque values should be on the hub bearing nuts as he was adding some grease to his hub bearings - and off the top of my head (DUH) I told him 110ft/lbs. for some reason thinking that was what I recalled reading at some point.
Now, it hit me last night - and got me wondering where I got that number from..
I have gone back this AM to see if I was right or wrong and have noted some references to it possibly being 80ft/lbs. instead!
I assume proper torque values are there for good reason and having 110 instead of 80 (if that is what it truly should be) would make a real difference and now the tracks (and hub nuts) should come off and get retorqued properly (big job.. which I should do - considering the poor information I passed along)..
But before I go through all of this - are the torque values for the axle hub nuts, front and rear, for a '22 850 Ultimate Trail 850 actually 80ft/lbs.?
Thanks for any input - he hasn't driven it very far so far - which is probably a good thing all considered - so if the nuts are too tight I would assume (you know how that works) nothing should have been screwed up so far..
Thanks - Randy
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I have a 450 ('18 - HO EPS model) and I did those nuts at 70 front and 110 rear - now I'm not sure if those are correct either - I've seen numbers all over the map from 70 square through to 80 square to 70 f and 110 r - which I presently have them set to as I mentioned.. There should be a chart or sticky made up for this site so the real and actual numbers for many, if not most current and past models, can be easily seen by and for idiots like me that don't apparently have much of a clue! :confused:
Ask latebird for a manual for your year machine. Typically stuff like that doesn’t change from year to year, but you never know. The torque value for a 2018 850/1000 castle nut is 80 ft-lbs (108 Nm) per the service manual.
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From the Service Manual: Page 2.31
FINAL DRIVE / WHEEL AND TIRE
WHEELS
Inspect all wheels for runout or damage. Check wheel
nuts and ensure they are tight. Do not over tighten the
wheel nuts.

WARNING

Operating an ATV with worn tires will increase the
possibility of the vehicle skidding and possible loss of

control.

Worn tires can cause an accident.
Always replace tires when the tread depth measures 1/

8” (.3 cm) or less.

WHEEL, HUB, AND SPINDLE TORQUE
TABLE
ITEM SPECIFICATION
Wheel Nuts

Steel: 27 ft-lbs (37 Nm)
Aluminum: 30 ft-lbs (41
Nm) + 1/4 Turn
Front Hub Retaining Nut 70 ft-lbs (95 Nm)
Rear Hub Retaining Nut 110 ft-lbs (149 Nm)
TIRE PRESSURE

CAUTION

Maintain proper tire pressure. Refer to the warning tire
pressure decal applied to the vehicle.
TIRE PRESSURE (COLD)
FRONT REAR
7 psi (48.3 kPa) 7 psi (48.3 kPa)
What model is that for?
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The question was:

I have a 450 ('18 - HO EPS model) and I did those nuts at 70 front and 110 rear - now I'm not sure if those are correct either - I've seen numbers all over the map from 70 square through to 80 square to 70 f and 110 r - which I presently have them set to as I mentioned.. There should be a chart or sticky made up for this site so the real and actual numbers for many, if not most current and past models, can be easily seen by and for idiots like me that don't apparently have much of a clue! :confused:




The answer is;

Polaris 450/570 from the latest version of the Service Manual Latebird sent me, I believe it's 2017 - 2019 but specs haven't changed for later models.
Just to be clear, OP was talking about a 850 Ultimate which the specs are 80 ft.lbs. You provide the specs for a 450/570 which are 70 front, 110 rear. Now we know.
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