T M 5 - 6 1 1 5 - 5 8 5 - 12
N A V F A C P - 8 - 6 2 3 - 12
T O - 3 5 C 2 - 3 - 4 5 5 -1
T M - 0 5 6 8 4 C - 12
(2) Air Housing Duct Cover. Remove air housing
duct cover (2) by removing screws (1).
( 3 ) S h u t t e r A s s e m b l y . D i s c o n n e c t w i r i n g t o t h e r -
mal switch at connector plug (5) on outside of shutter
a s s e m b l y . L o o s e n h o s e c l a m p ( 6 ) a n d d i s c o n n e c t a ir
i n t a k e h o s e f r o m s h u t t e r a s s e m b l y ( 4 ) . R e m o v e c a p-
s c r e w s ( 3 ) a t t a c h i n g s h u t t e r a s s e m b l y t o e n g i n e a n d
b l o w e r h o u s i n g ( 3 3 ) . C a r e f u l l y p u l l s h u t t e r a s s e m b l y
(4) away from muffler (44) until lead from connector
( 5 ) t o h i g h t e m p e r a t u r e c u t o u t s w i t c h ( 4 2 ) b e c o m es
a c c e s s i b l e . D i s c o n n e c t l e a d s f r o m h i g h t e m p e r a t u re
c u t o u t s w i t c h ( 4 2 ) a n d r e m o v e s h u t t e r a s s e m b l y ( 4 ) .
( 4 ) R e m o v e s c r e w s ( 3 7 ) , w a s h e r s ( 3 8 ) , s p a c e rs
(40) and shock-mounts (39) and remove lifting bracket
(41).
(5) Remove screws (34) and remove front shroud
(36).
( 6 ) S h r o u d A s s e m b l y . O p e n l a t c h e s ( 1 4 ) , r e m o v e
screws (7), and washers (8), lift panel (9) and shroud
(11) as an assembly from the engine and blower hous-
ing (33).
(7) Baffles and Shrouds. Remove baffles (16) and
( 1 7 ) b y r e m o v i n g s c r e w ( 1 5 ) . R e m o v e r e a r s h r o u d
(23) by removing screw (20), screw (18), washer (19),
s c r e w ( 3 4 ) a n d b r a c k e t ( 2 2 ) . R e m o v e b a f f l e s ( 2 6 ) b y
removing nuts (24) and J bolt (25).
(8) Blower Grille Assembly. Remove screws (27)
and retainers (28) and remove grille (30).
( 9 ) B l o w e r H o u s i n g . R e m o v e s c r e w s ( 3 1 ) a t t a c h-
ing housing (33) to engine and remove screw (32) at-
taching housing to oil cooler support bracket. Remove
housing (33).
( 1 0 ) R e f e r t o p a r a g r a p h 4 - 3 0 a n d r e m o v e o i l
c o o l e r a n d b a s e . R e m o v e s c r e w ( 3 4 ) , c l i p ( 3 5 ) a nd
s h r o u d ( 3 6 ).
c . C l e a n i n g a n d T e s t i n g .
( 1 ) I n s p e c t t h e e n g i n e f i n s a n d t h e h o u s i n g a s-
s e m b l i e s f o r d e b r i s a n d r e m o v e a s n e c e s s a r y . C l e a n
using detergent, clean cloth and brush.
( 2 ) D i s c o n n e c t l e a d s a n d r e m o v e h i g h t e m p e r a -
ture cutout switch from cylinder head. Check continuity
b e t w e e n t w o t e r m i n a l s w h i l e h e a t i n g s w i t c h w i t h i ts
mounting stud submerged in oil. When the temperature
o f t h e o i l r e a c h e s 3 9 4 ± 1 0 ° F ( 2 0 1 ± 5 ° C ) t h e s w i t c h
s h o u l d o p e n . S w i t c h s h o u l d c l o s e w h e n t e m p e r a t u r e
drops below 394 ±10°F (201 ±5°C). If switch does not
p e r f o r m a s i n d i c a t e d , r e p l a c e.
d . D i s a s s e m b l y o f S h u t t e r A s s e m b l y ( s e e f i g u r e
4 - 4 ).
( 1 ) S h u t t e r T h e r m o P o w e r U n i t A s s e m b l y . R e -
m o v e e l e c t r i c a l c o n n e c t o r ( 3 ) b y r e m o v i n g s c r e w s
(1) and nuts (2). Remove screws (4) and special washer
( 5 ) a t t a c h i n g t h e r m o u n i t a s s e m b l y ( 6 ) t o s h u t t e r a s-
s e m b l y a n d r e m o v e t h e r m o p o w e r u n i t a s s e m b l y . B e
c a r e f u l p l u n g e r d o e s n o t f a l l o u t o f t h e r m o u n i t a s-
s e m b l y .
( 2 ) S h u t t e r s . R e m o v e e i g h t s c r e w s ( 7 ) a t t a c h i n g
shutters (8) to bracket assemblies (9, 10 and 11). Re-
m o v e s h u t t e r s . R e m o v e n u t s ( 1 2 ) w a s h e r ( 1 3 ) a n d
shutter torsion springs (14). Brackets (11) can now be
r e m o v e d . R e m o v e b r a c k e t b e a r i n g s . R e m o v e s c r e ws
(17) and remove bearing (15) and washer (16), brackets
(9 and 10).
( 3 ) B r a c k e t s.
( a ) R e m o v e c l i p s ( 1 8 ) t h a t r e t a i n l o w e r r od
(19) in bracket (9) and pivot arm (20). Remove lower
r o d a n d b r a c k e t ( 9 ) . R e m o v e b r a c k e t b e a r i n g , s c r ew
(17) and remove bearing (15) and washer (16).
(b) Remove nut (21), clip (22) and ball arm as-
s e m b l y ( 2 3 ) . R e m o v e b r a c k e t ( 1 0 ) a n d a s s o c i a t ed
bearing (15), washer (16) and screw (17) using proce-
dure as in paragraph (a) above.
( c ) R e m o v e p i v o t a r m ( 2 0 ) b y r e m o v i n g n ut
( 2 4 ) , l o c k w a s h e r ( 2 5 ) , f l a t w a s h e r ( 2 6 ) , w a s h e r ( 2 7 ),
bearings (28) and bolt (29).
e . T e s t .
( 1 ) T h e r m o P o w e r U n i t A s s e m b l y . I m m e r s e t h e
t h e r m o u n i t i n t o a c o n t a i n e r o f o i l w h i l e m o n i t o r i n g
t h e o i l t e m p e r a t u r e . P l u n g e r o f t h e r m o u n i t s h o u ld
s t a r t t o e x t e n d w h e n t e m p e r a t u r e r e a c h e s 1 2 0 ° F ( 4 9°
C). Total extension at 140°F (60°C) should be at least
13/64 inch. Replace thermo unit if it does not operate
p r o p e r l y.
f . R e a s s e m b l y o f S h u t t e r A s s e m b l y .
( 1 ) B r a c k e t s.
(a) Reassemble pivot arm (20) using bolt (29),
bearings (28), washer (27), flatwasher (26), lockwasher
(25) and nut (24).
(b) Mount bracket (10) to box (30) using bear-
ings (15), lockwasher (16), and screw (17). Be careful
not to confuse bracket (10) with bracket (9). Connect
ball arm assembly (23) to bracket (10) and pivot arm
(20) using clip (22) and nut (21).
(c) Mount bracket (9) along with bearing (15),
l o c k w a s h e r ( 1 6 ) a n d s c r e w ( 1 7 ) . E n s u r e t h a t b r a c k et
is mounted so that shutter divider acts as inside stop.
Mount lower rod (19) to bracket (9) and pivot arm (20)
using clips (18).
(a) Install brackets (11), bearings (15) and lock-
washer (16). Ensure that lower bracket is mounted so
t h a t s h u t t e r d i v i d e r a c t s a s i n s i d e s t o p .
4 - 1 3
