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Which lubricant is applied to a starter drive assembly?

  • A.A high melting point grease packed throughout the housing, which protects the components from the heat generated
  • B.A light grease on the helical splines only
  • C.Engine oil applied to the bearings, the commutator and the splines throughout the assembly during the overhaul
  • D.None at all

Answer: B

The splines need a trace of grease so the drive slides freely, but oil on the commutator or brushes is fatal. Bushes are lubricated at assembly. Packing the housing would contaminate the commutator immediately. The order in which the effects act is what decides the outcome, so it is worth establishing first. Naming what changes and what stays the same is the reliable route through questions of this shape. Tracing the requirement back to the physical constraint that produces it makes the answer follow.

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