Operating instructions

5-10
5-36. STARTER DRIVE ADAPTER. The clutch
spring sleeve is shrunk and doweled in the housing. If
it is necessary to remove the needle bearing in the
adapter, a removing driver may be made similar to the
driver illustrated in Figure 3-1.
Check oil feed holes to the starter adapter shaft- gear.
Hole diameter should be .0918-.0968 to reduce
possibility of clogging and causing lubrication loss to
starter adapter clutch spring. On sandcast crankcase,
hole is located off the rear main boss of the 1-3-5
crankcase half and enters the needle bearing
counterbore near the top of the holes at a 10 to 11
o'clock position. This hole can be enlarged, if
necessary, to the above dimension.
On permold crankcases, the oil feed hole comes off
the rear cam bearing of the 1-3-5 crankcase half and
intersects a very short hole in the center of the needle
bearing counterbore. Hole can be enlarged as above,
if necessary, after removal of the starter adapter.
5-37. OIL PUMP ASSEMBLY. Except for stoning
down nicks on parting flanges and replacement of
studs and worn parts, no repairs to the pump assembly
are possible. The pump driven gear shaft is pressed
into the pump housing and cannot be replaced
successfully. The pump gear chamber must not be
enlarged; hence, if it is scored the housing must be
discarded. Heavy scoring on the gear contact area of
the tachometer drive and pump cover renders this part
unserviceable, unless the parting surface can be lapped
smooth and perfectly flat.
5-38. IGNITION CABLES. Normally, all ignition
cable assemblies or harness assemblies should be
replaced at each overhaul. If the high tension outlet
plates are in good condition, new cable assemblies and
grommets may be installed on them and the cable ends
secured to the grommet of each harness with a brass
washer and a cable piercing screw, installed as in the
original assembly. If only the cable assemblies and
grommets are to be replaced, leave the cable clamping
bracket on the original cables of each harness, and
detach all cables from the high tension outlet plate by
removing the cable piercing screws from their ends in
the plate grommet. When the coupling nuts are
unscrewed the cables may be withdrawn and the
grommet removed from the plate. Observe the “1”
mark on the exterior side of each outlet plate adjacent
to the No.1 cable outlet hole. Refer to Figure 5-11
and observe that the numerals appearing at magneto
ends of the high tension cables correspond to the
consecutive order of outlet plate cable holes, while the
FIGURE 5-10. INSTALLING NEW STARTER
ADAPTER NEEDLE BEARING.
relative positions of spark plug elbows indicate the
installed positions of the cables. Install cable
assemblies (3 through 14, Figure 5-11) in the
indicated positions in the two outlet plate and
grommet assemblies (1 and 2), starting with the proper
No.1 cable assembly in the marked hole of each plate,
and proceeding in consecutive order around the plates.
As each cable end is inserted, screw in the cable
coupling nut (33),and tighten it; then place one of the
brass washers (16) and a cable piercing screw (17) at
the grommet hole, and turn the screw in firmly but not
enough to cut the wire strands. When all cables have
been attached to the two outlet plates, locate a
clamping bracket (18) on the proper cables of each
harness in the same position as on the original cables,
and install a rivet (19) to secure it. Parts indexed 21
through 32 will be installed at final assembly. This
group should be collected and ready for installation.
Parts indexed 33 through 37 are installed on the
aircraft ignition switch wires. If replacement of spark
plug ends is necessary, proceed with disassembly as
indicated I (Items 38 through 45) for Slick Harness,
and (Items 46 through 52) for Bendix Harness.