Swivel pin play

Service Bulletin - November 1978............. number 1978/6


Excessive front wheel swivel pin play

Reports have been received of vehicles suffering from excessive front wheel swivel pin play, resulting in M.O.T. failure.

Before fitting a new swivel pin kit to any suspect vehicle, the amount of free play at the wheel rim should be checked using a dial gauge.

Procedure for checking swivel pin wear

1. Jack up the front of the vehicle with its front wheel in the straight ahead position. Ensure the vehicle is supported on chassis stands.

2. Tighten the hub nut until all bearing end float is eliminated.

3. Set up the dial gauge indicator on a suitable base so that the plunger rests against the wheel rim, as shown in figure 1. Set the dial gauge indicator to zero.

4. Gently rock the front wheel and note the reading on the dial gauge indicator. Total movement at the wheel rim should not exceed 0.030” (0.76mm)

5. If the total movement at the wheel rim exceeds the above limit, check the swivel pin and bushes for wear and fit a new swivel pin kit ‘R’ part number 90448 as necessary. (See Robin workshop manual ‘R’ part number 90293 Section B - Front Suspension).

6. Re-adjust wheel bearings to obtain necessary end float. (See Robin workshop manual ‘R’ part number 90293 Section B - Front Suspension).

swivel pin