K 3500 Truck 4WD V8-454 7.4L (1994)
Fig. 3 PG-260 Straight Drive Starter.
The Delco-Remy starter motor SD-300 has the solenoid shift lever mechanism and the solenoid plunger enclosed in the drive housing to protect them
from exposure to road dirt, icing conditions and splash. They have an extruded field frame and an overrunning clutch type drive. The overrunning clutch
is operated by a solenoid switch mounted to a flange on the drive housing. The PG-260 permanent magnet gear reduction starter achieves gear reduction
at a ratio of 5:1 through planetary gears.
The solenoid is attached to the drive end housing by two screws. The cover can be removed to inspect the contacts and contact disc, but the switch is
serviced as an assembly only.
Most motors of this type have graphite and oil impregnated bronze bearings which ordinarily require no added lubrication except at time of overhaul
when a few drops of light engine oil should be placed on each bearing before reassembly.
