Drive Shaft Nut - Replace with New Nut, Update

SECTION
7

GROUP
77

NO.
801

DATE
Mar. -96

Drive shaft nut
850

REFERENCE:
TP 6001201, SECTION 6, 7 (6064, 70-77) FRONT END, STEERING, 850 1992-

This Service Bulletin supersedes SB 77-801 from December 1995, which should be discarded.

Locking of drive shaft nut and wheel hub

If a drive shaft nut that requires staking needs to be re-tightened or removed, a new nut must be installed.

Tighten the new nut to the correct torque and lock as described below.

Procedure for locking hub:

Clean splines and groove in shaft thoroughly. Remove all oil, anti-rust agent and dirt.





Apply 3-4 mm (3/16" - 1/4") wide bead of metal adhesive, P/N 1161370-0. Apply bead around shaft covering approx. 1/3 of splined length (as illustrated).

Note:
Apply adhesive around complete shaft just before installing hub.

Install hub and new nut.

Tighten nut to 120 Nm (89 ft. lbs) + 60° as specified in service manual.

Lock the nut (stake the nut) by tapping outer flange into drive shaft groove, using suitable tool (as illustrated).

Note:
From chassis no:s. 854: 219646, 855:121429 a new drive shaft nut has been introduced on all versions of the 850, which means the following changes should be noted:

- The nut is reusable

- There is no locking groove in the drive shaft.

- The threads on the shaft end have increased from M20 to M22.

- New self-locking nut with M22 thread.

Note:
The nut must be oiled before use.

The new nut must be tightened to the same torque and protractor angle as previously, 120 Nm (89 ft.lbs) + 60°.