Tappet adjuster
Page 84
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A tappet adjuster has been evolved by B. Draper and Son Ltd which is known as the SPQR and has a built-in gauge that eliminates the need for checking clearances with a feeler gauge.
A socket of appropriate size is placed over the tappet locknut which is released by turning a handle. A built-in screwdriver with a knurled grip is used to tighten the adjuster screw; a torque limiting device produces a loud click when the clearance has been taken up.
When the screw is turned in the reverse direction to provide the necessary clearance a click is heard for each increment of movement, the equivalent in thousandths of an inch being read off a data card. As the locknut is tightened with the handle the knurled grip of the built-in screwdriver is used to
prevent movement of the The tool is applicable to engi produced by 27 makers. Made by: B. Draper and Ltd, Chandlers Ford, Eastlei Hants.
Price: Recommended retail p of adjuster with one soc £4.99; boxed set with sockets, £6.81.