Operating instructions

8-7
FIGURE 8-9. CYLINDER FLANGE TORQUE SEQUENCE
FIGURE 8-10. FUEL PUMP, OIL PUMP AND STARTER
ADAPTER INSTALLED. SANDCAST CRANKCASE.
g. As soon as each cylinder has been installed, secure
it moderately with flange nuts (18, 19, Figure 4-20).
h. Tighten flanged nuts according to sequence in
Figure 8-7 or 8-8 or 8-9.
i. Install spark plugs and gaskets in upper cylinder
holes.
8-9. OIL PUMP-INTEGRAL TYPE OIL
SCREEN (See Figure 4-18).
a. Remove two sets of attaching parts and remove
tachometer drive and pump cover.
b. Spread a thin film of No.3 Aviation Permatex on
the rear parting surface of the oil pump housing. Lay
No. 50 silk thread inside bolt holes and studs, but clear
of edge.
c. Install cover and secure it as before, with two -sets
of attaching parts.
d. Without delay lubricate pump shaft splines and
install gasket and pump assembly on crankcase studs.
Install attaching parts and torque to values specified in
Table of Limits, Section VI.
e. Tighten oil filter cap and left-hand threaded
tachometer drive housing.
8-10. OIL PUMP -FULL FLOW TYPE FILTER,
PERMOLD ENGINE (See Figure 4-19).
a. Remove attaching parts (23, 24, 25, IO-520-B) or
(31, 32, 33, IO-520-C) and detach cover from pump.
b. Spread a film of No.3 Aviation Permatex on the
rear cover flange of the oil pump. Lay No. 50 silk
thread inside the bolt holes and studs but clear of the
edge.
c. Replace cover assembly and secure with same
attaching parts.
d. Install gasket (22) on crankcase.
e. Mount oil pump assembly on crankcase studs and
secure with attaching parts (19, 20, 21). Torque to
value given in Table of Limits, Section VI.
f. Install spin on filter and torque to value given in
Table of Limits.
If filter indexed (60 through 64) is being used, install
spacers (58) and secure bracket (57) to crankcase with
attaching parts (54,55, 56).