1996 850 rear hub torque, 3546510 9200250 change mid year in 1996 Topic is solved

[RickHaleParker]

Found this in VIDA. Vehicle profile set to 1996 AME 850.
Information type: Specifications, mechanical.
Search all for "Rear wheel hub" you should find it.

One thing Volvo is infamous for is: midyear production changes that are not uniform across the production plants.

Jim Bee: What is the thread size of the shaft end?


New nut for rear wheel hub

A new nut for the rear wheel hub will be introduced into production on all 850 models.

Factory Code: Model: Chassis No:
1 854 1219646
1 854 2221178
2 855 2121509


The introduction of the new wheel hub will result in the following changes:
The shaft end thread size has been increased from 20 mm to 22 mm.
New, self-locking nut with 22 mm thread.
The new nut is re-usable.
Note! The rear wheel hub threads must be oiled before reinstalling the nut.
Tightening torque for the new nut is 120 Nm (89 ft.lbs) + 35°.

[RickHaleParker]

Abscate: 1999 P80s? ... '97 was the last year for the 850.

[abscate]

I think the P80 designation was used up to 2000 for the V70 chassis and 2005 for the C70

[abscate]

I missed your post above, Rick, it got caught in the electronic binder as I turned the thread page....

I’m happy that my intuition on reusing the nut was good!

[abscate]

If anyone comes across the part numbers for the two nuts

20mm thread , 120 Nm plus 120 angle

22 mm thread. 120 Nm plus 35 angle, oiled threads

[RickHaleParker]

20mm - 3546510.
22mm - 9200250

Always check the size, The Axle may of been upgraded.

[abscate]

Thanks Rick, added part numbers to title for search

[abscate]

I am going to check on something this morning.

The rear nut may be one of these Volvo self locking with a metal shoulder inside the thread, in which case my re-using it is a really, really bad idea.

The inspiration for this was that I came across this with the P8- ball joint retaining bolt/nut. Its not really high torque but the nut has a soft metal shoulder that locks it in place.

[FireFox31]

It looks like they backed the torque off in 99

A change in angle torque from 120 degrees ( early) to 30 (1999) is a huge change in final torque

The nut doesn’t see any rotational force, it just pins the hub to the shoulder on the spindle.

Confessions..when I did my rear hub I re-used the nut as I calculated the deformation was near zero, well below the plastic limit

What's your source for the 1999- torque value of 30 Nm? Haynes says 120 degrees plus an angle, but they don't always differentiate between -1998 and 1999-. I tried to search VIDA for "rear wheel hub" with profile set to 2000 V70 AME but I got only partial information, as if my VIDA is incomplete.

I'm basically wondering if I can reuse nut 9200250 on a 2000 V70 because it's at low torque or must replace it because it's at high torque. Hate to spend another $20 to replace my rusted brake dust shields.

[abscate]

The torque spec is

120 Nm , then 35 degree angle

Per ricks post above from VIDA. The change came about 1996 with a change in axle shaft diameter

Found this in VIDA. Vehicle profile set to 1996 AME 850.
Information type: Specifications, mechanical.
Search all for "Rear wheel hub" you should find it.

One thing Volvo is infamous for is: midyear production changes that are not uniform across the production plants.

Jim Bee: What is the thread size of the shaft end?


New nut for rear wheel hub

A new nut for the rear wheel hub will be introduced into production on all 850 models.

Factory Code: Model: Chassis No:
1 854 1219646
1 854 2221178
2 855 2121509


The introduction of the new wheel hub will result in the following changes:
The shaft end thread size has been increased from 20 mm to 22 mm.
New, self-locking nut with 22 mm thread.
The new nut is re-usable.
Note! The rear wheel hub threads must be oiled before reinstalling the nut.
Tightening torque for the new nut is 120 Nm (89 ft.lbs) + 35°.