Operating instructions

7-3
b. Install clutch spring (18) on worm wheel (19).
Turn spring so it tends to unwind until offset end
drops into gear hub groove. Position spring on gear so
screw notch is aligned with screw hole in gear web.
Install tab washer (17) and screw (16).
c. Lubricate spring, sleeve and shaftgear liberally
with clean oil. Press worm wheel, bearing (20) and
spring assembly onto shaftgear (21). Install bearing
(15) and retaining ring (14) on shaftgear. Insert
shaftgear and worm wheel assembly into adapter.
Make certain worm wheel and worm gear teeth are
aligned. Install a new "O" ring (13) in groove of
cover (12). Slide cover over shaft. Install three sets
of attaching parts (9,10,11).
d. Install "O" ring (4) on starter adapter. Turn starter
shaft until tongue is aligned with worm gear shaft slot.
Mount starter (3) on adapter studs and secure with
attaching parts (1,2).
7-10. CYLINDER (See Figure 4-20). Each cylinder
should have its position number (1 through 6) stamped
on edge of base flange. After assembly, cylinders
should be laid on a bench in order of position number.
Place piston, pin and ring assemblies in front of each
cylinder in the same order. Piston position numbers
are stamped on head rim. When assembled to engine,
piston number will be towards propeller flange. Mark
any new cylinder and/or piston accordingly.
a. Spread a film of Gredag No. 44 grease on valve
stems (33, 34) and insert them in cylinders to which
they have been lapped. Grasp valve stems and lift
cylinder onto a post which will support valve heads.
Clamp cylinder base flange to prevent it from rising.
Again apply Gredag No. 44 to valve stems.
b. Place valve spring retainers (32) over valve guide
(38) cupped side up. Install inner and outer valve
springs (30, 31), per instructions in Figure 7-1, outer
retainer (29) and rotator (28). Compress springs and
install keys (27). Make certain keys are properly
seated before releasing pressure on springs. Remove
cylinder from fixture and set it upright on a bench.
Strike end of each valve stem sharply with a rawhide
mallet to seat stem keys.
c. Install new packing (26) on each cylinder skirt.
Push against flange and make certain none are twisted.
Coat cylinder bore walls thoroughly with Cities
Service No Scuff Oil No. 9028 or castor oil.
FIGURE 7-1. VALVE SPRING INSTALLATION.
7-11. PISTON AND RING ASSEMBLIES (See
Figure 4-20).
a. Lubricate pistons (21) and rings (22, 23, 24, 25)
liberally with Cities Service CMS No. 50 or No. 9028
No Scuff Oil.
b. Position first and third ring gaps on top of piston.
Position second and fourth ring gaps so they will be
1800 apart from first and third ring gaps.
7-12. PUSHROD HOUSINGS (See Figure 4-20).
a. Install a washer (16), packing (17) and second
washer (16) on cylinder end of housings (14).
b. Install spring (15), washer (16), packing (17) and
second washer (16) onto crankcase end of housing
(14).
c. Lay two housings with each cylinder.