Install cam (20) and cam handle (19) on the shaft. Install washer () and pin (7) on the other end of the
Assemble bearing (15), spring (14) and valve latch (13) in the housing and lightly secure with screw (11) and
lock washer (12).
Align the notch on the bearing with the notch on the latch and lock the bearing in this position.
g. Install pin (10) in valve (17) to retain it to the shaft with the cam release latch set and the valve in the run
h. Level the valve in the shut down position, and adjust the bearing to the valve contacts the housing when the
cam release latch is set.
a. Place screen and gasket assembly (6) in position with the screen side of the assembly toward the blower.
b. Install and finger tighten screws (1), (2) and (3) with lock washers (4) and flat washers (5). Tighten the two
center screws to 16--20 ft-lb (2--27 N m).
c. Then tighten the four corner bolt to 16--20 ft-lb (22-27 N. m).
A power wrench should not be used to tighten these screws
Section VII. REPAIR OF AIR BLOWER
The air blower supplies fresh air required for combustion and scavenging Its operation is similar to that of a gear-type oil
pump. Two hollow double-lobe rotors revolve in a housing bolted to the side of the engine. The revolving motion of the
rotors provides a continuous and uniform displacement of air.
a Refer to TM 5-3810-295-12 and remove the air filter and air inlet housing.
b. Refer to figure 3-7 and loosen clamp (1).
c. Remove screws (2) and washers (3). Lift air blower assembly from the engine.
d. Remove gasket (4) from the engine.
a Remove screws (5), special washers (6) and reinforcement plates (7), and remove front cover (8) and gasket
9) from the end plate.
b. Remove seal (10), screws (11), lock washer (12) and flat washers (13), and remove rear cover (14) and gasket
c. Wedge a lean cloth between the rotors to prevent their turning and remove screws (16) and retainer (17).
b. Remove retaining ring (18) and slide drive shaft (19) from the assembly.
d. Remove drive cam (20), springs (21), spring seats (22) and spacer (23) Remove screw (24), washer (25) and
drive spring support (26).