partsman01
Poco British Columbia
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Joined: 07/22/2005
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Have an 1989 Prowler Lynx 18.5 foot, tandem axle, 13" tires the wheel studs are a 1/2-20", any idea what they should be torqued too?
Oh yes, standard white steel spoke rims, I think they are called.
I was thinking around 70 FT Lbs, as my truck with that thread is 90 foot pounds, but I think for a trailer that would be too much.
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hemlox
Western Illinois
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I torque mine to 90. I am not sure what the specs are for your rig, but I think 70 would be on the light side.
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Dennis M M
Geneva, IL
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I always did mine to 90 lbs/ft also.
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SoCalDesertRider
SanDiego, CA, USA
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1/2" studs to 90 lb-ft is what I've always done.
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partsman01
Poco British Columbia
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Great, that is what my ford truck calls for, so sounds like I should do the trailer the same, it does have the same thread size as the truck, I just wasn't sure as the truck I figured would be under more stress, but seems like the safest way to go.
Thanks for the input.
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Charlie D.
Gonzales, La.
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Never could find torque value for my 15" aluminum rims. When checking the air on my painted steel rim, it said to torque to 90-120 #'s.
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Pickle2
Riva, Maryland,
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I torque to 95 ft-lbs on my 15/16 lugs (steel, 15" rims)
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partsman01
Poco British Columbia
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Well dug through the fifth wheel and there was a book from the original owner, it called for 85 - 95 Ft Lbs, so I took them up to 95 Lbs, so I should be good now.
The wheel nut is a 13/16" but I gather they go more by the size of the stud for the torque.
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partsman01
Poco British Columbia
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Found this on the Cerka site, seems a little on the light side.
Torque Requirements
It is extremely important to apply and maintain proper wheel mounting torque on your trailer axle. Torque is a measure of the amount of tightening applied to a fastener (nut or bolt) and is expressed as length times force. For example, a force of 90 pounds applied at the end of wrench one foot long will yield 90 Ibs.-ft. of torque. Torque wrenches are the best method to assure the proper amount of torque is being applied to a fastener.
Note: Wheel nut or bolts must be applied and maintained at the proper torque levels to prevent loose wheels, broken studs, and possible dangerous separation of wheels from your axle.
Be sure to use only the fasteners matched to the cone angle of your wheel (usually 60 or 90 degrees.) The proper procedure for attaching your wheels is as follows:
Start all bolts or nuts by hand to prevent cross threading.
Tighten bolts or nuts in the following sequence.
3. The tightening of the fasteners should be done in stages. Following the recommended sequence, tighten fasteners per wheel torque chart below.
4. Wheel nuts/bolts should be torqued before first road use and after each wheel removal. Check and re torque after the first 10 miles, 25 miles, and again at 50 miles. Check periodically thereafter.
Wheel Torque Requirements
Wheel Size 1st Stage 2nd Stage 3rd Stage
12" 20 - 25 35 - 40 50 - 60
13" 20 - 25 35 - 40 50 - 60
14" 20 - 25 50 - 60 90 - 120
15" 20 - 25 50 - 60 90 - 120
16" 20 - 25 50 - 60 90 - 120
16.5" x 6.75" 20 - 25 50 - 60 90 - 120
16.5" x 9.75" 55 - 60 120 - 125 175 - 225
14.5" Demount Tighten sequentially to
85 - 95
17.5" Hub Pilot Clamp Ring & Cone Nuts 50 - 60 100 -120 190 - 220
17.5" Hub Pilot 5/8" Flange Nuts 50 - 60 90 - 200 275 - 325
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