Operating instructions

8-4
j. Insert, from above, through bolts (58, 59,60, 61).
Tap all of these through to centered positions with
non-marring hammer. These bolts align crank- case
castings and bearings.
k. Install a washer (30) and flanged nut (29) on each
of the two front through bolts. Install an "0" ring (47),
plain washer (46), lockwasher (45) and nut (44) on
extreme upper rear through bolt on right crankcase.
l. Install fuel manifold valve and bracket, lifting eye
(12), spacer (13) and secure with attaching parts (11,
10, 9, 8). Install bolts (48), washers (50, 51) and nuts
(49). Install attaching parts (31 through 43).
m. Install "O" rings (47, 48) and mounting legs not
previously installed (IO-520-C).
n. Seat idler gear flanged bushing (27). Do not install
attaching parts yet.
o. Tighten attaching parts installed in steps "I" and
"m".
p. Attach right mount bracket or crankcase to
assembly stand and rotate stand until engine is
upright.
q. Install, but do not tighten, idler gear flanged
bushing attaching parts (25, 26).
FIGURE 8-5. INSTALLING NO. 6 CYLINDER.
8-8. CYLINDERS AND PISTONS.
a. Before installing each cylinder and piston, rotate
crankshaft to place rod in top center position.
b. Place piston over the rod with the position number
toward the propeller flange.
c. Lubricate pistons and rings liberally with Cities
Service No Scuff Oil, No. 9028.
d. Hang a ring compressor on the piston skirt.
Holding cylinder in arm, center compressor over rings
and compress fully. Push cylinder onto piston, forcing
compressor off piston.
e. Remove ring compressor and place cylinder base
flange onto hold down studs. Make sure packing is in
place and not twisted and seat cylinder flange on the
crankcase cylinder pad.
f. Pistons and cylinders may be installed in any order,
but to minimize turning of crankshaft and any undue
loss of balance it is suggested that No.1 and 2 be
installed first, followed by 3,4 and 5,6.
FIGURE 8-6. TIGHTENING CYLINDER BASE NUT.