stupid question- washer on axle nut?

[rock doc]

just putting my sled back together and aligning the track. Tightened up the rear idler wheel axle and it just did not feel right when I torqued it to 57 ft/Ibs. Checked the microfiche for ordering parts and did not see a washer between the rear idler wheel bearing and the nut so I think I am ok. Just want to make sure before I end up stranded because I missed a 5 cent washer. The nut had backed off and fell on the floor when I was spinning the track to check alignment.

Sorry for the stupid question - hopefully it is an easy one. Seems odd that there is not washer and I can see the retaining ring holding the wheel. Pretty sure my Apex had a washer between the nut and the bearing.

 

[APEX 06]

My 09 xtx didnt have one so I added one and drilled a hole in the shaft for a carter clip.

 

[rock doc]

thanks for letting me know Apex 06.