Illus

REMOVING BLIND BUSHINGS FROM GEAR CASE COVER (SIDE VALVE ENGINE)

siderable road dust has been taken into engine through carburetor, abnormal wear may be found at any mileage.

Specified clearance for cam gear shafts in cover bushings and crankcase bushings and for pinion gear shaft in cover bushing is .0005" to .001". When bushings are worn to the extent of increasing clearance to .002" or more, they should be renewed, as the cam gears are likely to become very noisy with excessive clearance in these bushings. Worn bushings in case and cover with both ends open, can be pushed out with an arbor press, supporting case or cover on a suitable collar or sleeve at the flanged end of bushing. Bushings in cover, with one end blind, must be pulled with Harley-Davidson special puller, Part No. 11952-36 (see Illus. 42).

Before removing old bushings, note location of oil transfer hole in pinion gear shaft bushing in timing gear case cover and location of oil grooves in the four cam gear shaft bushings in crankcase. New pinion gear shaft bushing must be installed with oil transfer hole in same location (30° ahead of vertical center line) as normal function of oiling system depends upon correct location of this hole. The four cam gear shaft bushings in crankcase must be installed with oil groove in face of bushing flange upward (see Illus. 41).

Before pressing in new bushings, note location of original dowel pin holes in crankcase and/or gear case cover for reference when drilling hew dowel pin holes. When drilling dowel .pin holes in crankcase and/or gear case cover,1 be sure to locate holes Va" or more from original dowel pin holes.

When pressing in bushings (except rear exhaust cam gear shaft bushing in cover) be sure bushing flanges are seated tight against crankcase and/or gear case cover.

Before installing rear exhaust cam gear shaft bushing in cover, check thickness of bushing flange with micrometer. If bushing has a flange Va" thick, place it on a lathe mandrel and remove .015" from inner face of bushing flange and 1/32" from outer face of flange to make flange .078" to .079" thick. Later bushings are made, to this specification, and

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