TM 10-4610-246-13
5.7
MAINTENANCE OF UPPER AND LOWER MAIN CASE ASSEMBLY - (Cont)
Figure 5-5. Main Case Assembly
(f)
Unscrew P-valve (10) from upper main case
assembly. If P-valve cap (11) remains inside
housing, push cap out of upper housing by
push- ing from the outside in. Remove
preformed packing (12) from cap and discard.
(2) Disassemble upper and lower main case assembly.
(a) Remove eight bolts (1, Figure 5-5) and upper
main case assembly (2) from lower main
case assembly (3).
(b) Remove the cam by inserting screwdriver in
hole in cam (1, Figure 5-6) and turning
drive dog (6) counterclockwise.
(c) Remove packing nut (2), preformed packing
(4) and gasket (5).
(d) Remove
three
screws
(7)
securing
the
gearbox bearing plate (8).
NOTE
Hold upper main case assembly (10) in
the upright position while performing
step (e).
(e) Wiggle the gearbox bearing plate (8) while
pushing down on cam output shaft (3). Pull
and remove the gearbox bearing plate with
gears and spindles attached as a unit.
(f)
Remove output gear E (1, Fig 5-7), gear B
(2), gear C (3), gear D (4), and idler shaft
(5).
Use brass jaw protectors on vise to protect
input shaft.
(g) Secure input shaft gear A (7) in vise. Remove
drive dog (6) by turning counterclockwise.
Figure 5-5. Main Case Assembly
Figure 5-6. Cam and Gear Box Bearing Plate
5-10
