Page 144 - Vauxhall 20-60 H.P. (R Type) Chassis Shop Manual

VAUXHALL 20-60 SHOP MANUAL

This will allow the thrust face of the column support bush to enter further
into the steering box, and bring it closer to the cam.

To carry out this adjustment slacken the controls ‘I’ and ‘H’ at the bottom
of the steering box, and the control tube clamping bolt ‘E’.

– Remove the four column support nuts ‘D’ holding the column support
‘F’ to the box casting. Slacken the two bolts in the bottom half of the
column support bracket on the instrument board, and turn the steering
wheel as if to turn the steering on to the left lock. The column support
‘F’ being free to move upwards the cam will force it up as the steering
is turned in this direction. When the column support ‘F’ has been raised
sufficiently ( approximately / 8 ” ) but not clear of the studs, remove one
3
of the thin layers by means of a sharp knife or scissors, cutting the layer
into pieces, making sure that all pieces are removed.

– Turn steering wheel in opposite direction, and the cam will return to its
original position, taking the column support back with it.
– Replace and thoroughly tighten column support nuts ( ‘D’ ), and bracket
bolts. After making this adjustment the steering wheel shaft should be
free to revolve, but there should be no end play.
( See Figure 43 ) A second adjustment is provided for taking up back lash
between the hardened steel roller ‘B’ and the spiral groove in the cam.

Should this adjustment ever become necessary, remove the steering box
( Section 636 ).

– Remove steering drop arm and key.
– Remove steering box side cover and withdraw rocker shaft ‘C’ and roller
complete.
The ball races mounting the hardened steel roller are carried on a spindle
‘D’, which has two diameters at the ends concentric with each other, and
fitting snugly in the rocker bracket horns.

The middle part of this pin is eccentric with these two diameters. Since the
eccentric portion of the pin carries the ball races and roller ‘B’ the latter
can be raised or lowered into the cam, by rotating the eccentric pin, and it
can be locked in any position by means of two nuts ‘E’ and ‘F’ and locking
washers provided. After carrying out this adjustment it is important first
to lock the nut ‘E’ at the opposite end of the spindle to that in which the
screw driver slot is provided, and afterwards the nut ‘F’ at the slotted end
of the spindle. The washers are then locked up. It is also to be noted that to
raise the roller relative to the centre line •of the rocker shaft, giving deeper
engagement with the cam, the eccentric pin must be turned in a clockwise
direction, looking at the slotted end of the pin.
When this adjustment has been correctly made, it will be found that there
is a slight amount of back lash at the two ends of the cam movement but
none in the centre.

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