Member Since: 08 Sep 2025
Location: Cape Town
Posts: 5
No worries. Been busy my side too.
If 1.1Nm is not 'rotates freely' then I suppose that defines preload.
The Timken Bearing Setting document is a good read and bearing life is significantly reduced at either extremes:
I'm closer to ordering some bearings as a batch. All Timken.
Next is to visit the Volvo specialist and hunt for scrap Haldex clutch drums or for cheap so I can make the tool.
I'll be working on a special tool to check the dynamic torque (1.1Nm at 60rpm) to make my life easier when doing this.
18th Sep 2025 3:59 pm
MRRover75
Member Since: 13 Jan 2017
Location: Sandnes
Posts: 343
Re: Mounting input shaft
I guess you have seen the post, but here is how I made my tooling for measuring the dynamic torque. Simple, but works fab.
quote="MRRover75"]
Now the procedure calls out for measuring torque needed for rotating the input shaft. When rotating evenly at 60RPM, the torque reading shall be 1.1NM +/- 0,2 using a dynamometer. I do not have access to such fancy equipment, but I made a simple �50mm spool wheel connected to an extension bar with a set screw. Together with a piece of string and a scale, I was able to measure the load needed to rotate the shaft:
Click image to enlarge
As we know, the formula for torque is: Torque = force X arm length.
The required force needed will then be: force = torque / arm length
1.1Nm / 0,025m = 44N
44N / 9,81 = 4,48kg
Tolerance is approx 20% of the specified torque, so my reading shall be within 3,6 - 5,4 kg
I checked my scale with 5 litres of water in a bucket prior to the test, and found it to show 0,5kg to much at 5kg. I just have to take this deviation into my readings.
250Nm was not enough to start compressing the collapsible spacer, so I had to tighten the retainer nut in several steps before the readings on the scale was within the specifications. I found that a lot more force was needed to get the nut moving than the 250Nm specified. I worked the nut down in steps until the play in the shaft was gone and that I could feel resistance was needed to get it rotated.
I got approx 4,5kg on the scale when done.
The shaft now rotates with a smooth and firm feeling, more like a newly installed wheel bearing. This is a completely different feel than the shaft had prior to disassembly.[/quote]
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18th Sep 2025 3:59 pm
