Hi Frank:I see by the roster you have an SR2.
There seems to be a lot of iterations thru the years in the 2's and 3's. The
best thing to do is post up picturesof the uprights ...the front and the rear.
Would help also parts apart for pictures. I doubt if the front spindle nuts
are Metric. The threads might be beat up.....they might just be 3/4"-16. If
you have tapered bearings in the front uprights there should be a distance
piece between the cones. That distance piece has to set for proper clearance.
Use NEW half height steel clinching nuts. MSC has them. I can get U the
p/number. With 3/4=16 the torque is 160 ft/lbs.
Cant figure out keyways / keys. Front ? or more possibly
rears........PICTURES !!
Jerry B.
From: Tom Quaranto <tquan277@xxxxxxxxx>
To: "bobsy_talk@xxxxxxxxxxxxx" <bobsy_talk@xxxxxxxxxxxxx>
Sent: Saturday, July 23, 2016 8:41 PM
Subject: A Bobsy Talk Email: Re: Rear Axle Tightening Specs
Frank,I would tighten the nut enough to cause a little preload on the bearings.
Something around 10-20 inch pounds of rolling torque. This is usually checked
with a beam type or dial type torque wrench. The preload will eliminate any
wheel wobble, allowing for precise alignment settings. Any play will cause
increased bearing and seal wear. Too much preload will not leave enough "room"
for the lubricant to work.
How is the nut retained? Is there a lock tab or a nylon nut? If neither than
I would definitely either stake or locktite the nut to prevent it from backing
off. The preload spec is just a guess and really depends on bearing size and
loading. Of course one should rotate the assembly and check for the correct
preload after the initial setting, to ensure the bearing needles have centered
themselves.
Anyone else have any thoughts?
Tom Quaranto1972. S/R 6 #18Black Hawk Colorado
On Saturday, July 23, 2016, Frank L. Slejko <fslejko@xxxxxxxxxxxx> wrote:
Everyone, I’m working on the most recent screw-up done on the “race-ready”
Bobsy I bought some 14 years ago. Now it’s the rear wheel axles. Hopefully
not much left since I started from the front. I need to know what the proper
bolt torque specs are on the inner and outer rear axle nuts. The axle appears
to have been a mixed marriage of metric and ASE. The outer nut is 22mm and the
inner is 18 mm. The outer nut appears to just attach the hub and the rotor to
the shaft and according to the torque tables should be around 300 ft-lbs!
Maybe it was not torqued sufficiently because the key failed and allowed the
hub to rotate on the shaft. Plus, the key slot on the shaft only captured half
the length of the slot on the hub. However the inner nut preloads the bearings.
Any thoughts on the torque? The inner diameters of the inner and outer
bearings are somewhat different than what was published on this forum last
year, if that makes any difference. Should I tighten it to just allow a 0.004”
end play? Thanks for your help. Frank Slejko
