Operating instructions

4-7
4-13. INDUCTION SYSTEM.
a. IO-520-A, B, C, F,J, K, L (See Figure 4-6).
(1.) Loosen hose clamps (1) or clamp assemblies (2)
on hoses (3) or (4) and remove elbows (5, 6) or elbow
assembly (7).
(2.) Remove attaching parts (8, 9) loosen hose
clamps (II, 12) and remove balance tube (13) and
bracket (10).
(3.) Loosen hose clamps (14) from hoses (15) and
remove attaching parts (16, 17, 18). Remove intake
manifold tubes (19,20) and gasket (21).
(4.) BRACKETS. remove attaching parts (23 through
35) to separate brackets (36, 37, 38), bushing (39),
sleeve (40) and housing (41).
(5.) BRACKETS. Remove attaching parts (42
through 47) to separate brackets (48, 49, 50, 51),
bushing (52, 53), sleeves (54, 55) and housing (41).
b. IO-52O-D (See Figure 4-7).
(1.) Loosen hose clamps (1) on hoses (2) and re-
move elbows (3, 4).
(2.) Remove attaching parts (5, 6), loosen hose hose
clamps (8, 9) and remove balance tube (10) and
bracket (7).
(3.) Loosen hose clamps (11) from hoses (2) and
remove attaching parts (12, 13, 14). Remove in- take
manifold tubes (15,16) and gasket (17).
(4.) Remove attaching parts (19, 20) and sepa- rate
throttle assembly (21) from engine.
c. IO-520-E (See Figure 4-8).
(1.) Loosen hose clamps (1) on hoses (2) and re-
move elbows (3,4).
(2.) Remove attaching parts (5, 6), loosen hose
clamps (8, 9) and remove balance tube (10) and
bracket (7).
(3.) Loosen hose clamps (11) from hoses (2) and
remove attaching parts (12, 13, 14). Remove in- take
manifold tubes (15,16) and gasket (17).
(4.) Remove attaching parts (18 through 27) and
remove throttle assembly (28).
(5.) Remove attaching parts (29 through 32) and
remove brackets (33, 34, 35).
4-14. OIL SUMP IO-520-A, D, E, F, J, K AND L
(See Figure 4-9).
a. Drain plug (1) and gasket (2) should have been
removed when engine was mounted on stand. Remove
attaching parts (3, 4, 5) and lift sump from engine.
b. Remove screws (8, 9) and washers (10) and lift
off suction tube assembly (11).
c. Remove screw (13), washer (14), acorn nut (15)
and gasket (16) and withdraw oil suction tube (17).
4-15. OIL SUMP IO-520-B (See Figure 4-10).
a. Drain plug (1) and gasket (2) should have been
removed when engine was mounted on stand.
b. Remove attaching parts (3, 4, 5) and lift off
mounting legs (6).
c. Remove attaching parts (7, 8, 9) and lift off sump
(10).
d. Remove screw (13), nut (14), gasket (15) and
withdraw oil suction tube (16).
4-16. OIL COOLER (See Figure 4-11).
a. Remove attaching parts (1, 2, 3) and separate
cooler (4) from adapter.
b. Remove attaching parts (6, 7, 8) and pull adapter
(9) from crankcase.
4-17. OIL COOLER (See Figure 4-12).
a. Remove four sets of attaching parts (1, 2, 3) and
one set of attaching parts (4, 5,6) and remove oil
cooler.
b. Remove baffle (15) and oil temperature control
valve (12).
4-18. GENERATOR (See Figure 4-13).
a. Loosen sheave retaining nut on both starter drive
adapter and generator and adjusting arm screw. Tilt
generator and remove bolt (1).
b. Remove generator sheave retaining nut and re-
move spacer (2) and sheave (3). Tape woodruff key to
shaft and replace retaining nut to protect threads.
c. Remove bracket adjusting screw (4) and washer
(5). Remove bracket retaining screw (6), washers (7),
bushings (8), and sleeve (9) to remove bracket (10).