Shorrocks Servicing Tips
 
 

BELOW and on the subsequent pages are the content of the original Shorrocks dismantling and reassembling instructions for CB75B and C142B units, kindly supplied by sprinter Chris Illman.

  
Apologies for the photographs which are from photocopies, hence the poor quality.
This will print on two pages.
 

Removal of drive end plate.

Undo the ring of nuts securing end plate to casting. Remove end plate using two 3/16" Whitworth withdrawal screws (Fig. 1), in taped holes provided. Take care to withdraw end plate squarely.

   Fig 1
 

Removal of rotor drive plate.

Clear the centre punch depressions in the heads of the countersunk screws (Fig. 2), securing rotor drive plate to rotor. Remove ring of screws.

Remove rotor drive plate, using two 3/16" Whitworth withdrawal screws (Fig. 3), in tapped holes provided. Take care to withdraw plate squarely.

 

   Fig 2
    Fig 3
 

Removal of casing.

Undo ring of nuts securing casing to rear end plate. The casing must be taken of squarely (Fig. 4), to avoid damage to vanes and casing bore.
A fairly comprehensive examination can be made at this stage, but should further dismantling prove necessary, proceed as follows:

   Fig 4
 

Remove vane shaft locknut.

The nut is locked by a split pin or tab washer. Remove nut, for which special box spanners are available.

   Fig 5
 

GO TO PAGE 2 OF THE INSTRUCTIONS.