Torque Process for upper bearing assy Apha1 Gen 2

[Darin113]

I have the newer style press fit bearings and gear assy. I a changing the oil seal and short shaft but reusing the existing gear and bearings. Because the bearings were already set with a preload it seems they still have a preload from the original setup after removing the nut to change the seal and short shaft. What would the torque spec be for the nut in this case.

 

[dubs283]

What would the torque spec be for the nut in this case.

There is no torque for the nut. You release the existing preload from the bearing set, reassemble the u-joint assy/drive shaft yoke, retainer ring, seal, bearing set, gear, washer and nut then slowly tighten the nut until you reach the spec of 3-7 lb/in rolling torque for used bearings. You need a dial lb/in torque wrench for the procedure, most commonly used one is 0-15 lb/in wrench

 

[rustybronco]

There is no torque for the nut. You release the existing preload from the bearing set, reassemble the u-joint assy/drive shaft yoke, retainer ring, seal, bearing set, gear, washer and nut then slowly tighten the nut until you reach the spec of 3-7 lb/in rolling torque for used bearings. You need a dial lb/in torque wrench for the procedure, most commonly used one is 0-15 lb/in wrench

They make beam style in/lb torque wenches that read 15-0-15 also,

 

[achris]

They make beam style in/lb torque wenches that read 15-0-15 also,

Can't use a wrench, needs to be an indicator...

 

[rustybronco]

Can't use a wrench, needs to be an indicator...

Odd as I've used a beam style to build up plenty of automotive rear axles over the years. I guess all those companies who made them have been scamming us.

3/8" Drive Torque Wrench Model F-25-1 0-25 In Lbs Nut Bolt Tool Mechanics Shop | eBay

<p>3/8" Drive Torque Wrench Model F-25-1 0-25 In Lbs Nut Bolt Tool Mechanics Shop. </p><br /><p>Small chip on ball handle as shown in photos. </p><br /><p>Selling from my grandfathers estate. Please ask questions as my knowledge of these is limited. </p><br /><p>Usa only. Will combine shipping. </p>

www.ebay.com

 

[Scott06]

Odd as I've used a beam style to build up plenty of automotive rear axles over the years. I guess all those companies who made them have been scamming us.

3/8" Drive Torque Wrench Model F-25-1 0-25 In Lbs Nut Bolt Tool Mechanics Shop | eBay

<p>3/8" Drive Torque Wrench Model F-25-1 0-25 In Lbs Nut Bolt Tool Mechanics Shop. </p><br /><p>Small chip on ball handle as shown in photos. </p><br /><p>Selling from my grandfathers estate. Please ask questions as my knowledge of these is limited. </p><br /><p>Usa only. Will combine shipping. </p>

www.ebay.com

Ive used the same for ring and pinion changes as well For exact swme rolling torque with no issues. I think Chris indicator is certainly a better and more accurate tool but can get salty for shade tree mechanic

 

[rustybronco]

Ive used the same for ring and pinion changes as well For exact swme rolling torque with no issues. I think Chris indicator is certainly a better and more accurate tool but can get salty for shade tree mechanic

I will agree it's better (ease of reading) but more accurate? I disagree. The dial and accompanying rack and pinion adds additional points where wear 'can' make it less accurate over time. The proof would be in the the amount of calibration required. A beam style shouldn't require adjustment if well constructed.

 

[Scott06]

I will agree it's better (ease of reading) but more accurate? I disagree. The dial and accompanying rack and pinion adds additional points where wear 'can' make it less accurate over time. The proof would be in the the amount of calibration required. A beam style shouldn't require adjustment if well constructed.

Use whatever you like but typical beam style wrench is +/-7% , dial style is +/- 2% .of course huge difference in cost.

 

[rustybronco]

Use whatever you like but typical beam style wrench is +/-7% , dial style is +/- 2% .of course huge difference in cost.

If those numbers are accurate then yes, the dial type is the better option.

850222 Sturtevant Richmont Flat Beam M Series Torque Wrench, SAE

Sturtevant Richmont Flat Beam M Series torque wrench. Model: M 25 I Torque Capacity: 0-25 in. lbs. Steps Of Graduations: 1 in. lbs. Square Drive: 3/8'' Lever Arm Distance: 6.3'' Weight: 0.4 lbs.

omegatec.com

M series... "Accuracy of all flat beams is +/- 2% of indicated value from 20% to 100% of accuracy, in both directions."

Just pertains to Sturtevant-Richmond.

 

[Darin113]

There is no torque for the nut. You release the existing preload from the bearing set, reassemble the u-joint assy/drive shaft yoke, retainer ring, seal, bearing set, gear, washer and nut then slowly tighten the nut until you reach the spec of 3-7 lb/in rolling torque for used bearings. You need a dial lb/in torque wrench for the procedure, most commonly used one is 0-15 lb/in wrench

Do you need a bearing pres to relieve the pre set or can you safely drive the gear out enough with a dead blow hammer?

 

[Rick Stephens]

I did mine with the hammer rap to loosen by a few thous. Common trick with Merc mechanics. Great question.

 

[achris]

I did mine with the hammer rap to loosen by a few thous. Common trick with Merc mechanics. Great question.

Rubber or copper, I hope!

 

[Rick Stephens]

Rubber or copper, I hope!

I used the dreaded plastic dead blow. Suppose I should have said that.