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Technical Notes and Parts Information

DOOR LOCKS & HANDLES

Description
The door locks are the Wilmot Breeden rotary cam lock type which were also fitted to the rear doors of Standard Vanguard Phase 1 and 2 saloons. Exterior door handles are Standard Eight or Vanguard and the interior handles are also Standard Vanguard.

Operation
The open end of a forked latch on the shut face of the door engages with a striker stud on the door pillar which causes the latch to swing down. This then operates a cam inside the lock. In contact with the cam is a pawl that engages successively with two depressions in the cam profile. The first of these two depressions is the 'first safety' position and the second the 'fully locked' position. Should the door be closed with only sufficient force to engage the lock with 'first safety', the striker stud is retained opposite a recess in the latch slot, allowing the door to rattle when the car is in motion, so giving audible warning that the door is not properly fastened.

The engagement of the latch with the striker stud tends to force the door upwards and to prevent this happening a bronze wedge (free to slide laterally) is fitted in a housing above the striker stud. As the latch rotates, a cam profile on its upper end comes into contact with the wedge, which then holds the latch down against the stud and only allows lateral movement of the door.

Adjustment
Loosen the striker screws just enough to allow the striker to be tapped into a slightly different position, and then re-tighten the screws. Check that there is 1/32 - 1/16 in. of clearance between the outside handle push button adjusting screw and the lock lever. Never slam the door hard while positioning the striker because strained door hinges, lock mechanism or striker wedge housing can result. Close the door gently and try to feel for faults during the last part of the travel.

Ken Yankey 2004



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