Figure 3-7. Blower, disassembly and reassembly.

TM 10-3930-242-34

Figure 3-7. Blower, disassembly and reassembly.

rotor shafts. Be sure that seals are properly

tioning the rotors with missing serrations in the

positioned on rotors. Then, secure end plate (17)

u p p e r rotor facing to the left, and the missing

s e r r a t i o n in the lower rotor facing the bottom.

to blower housing with bolts.

Install the shim (14) and spacers (15) in the

( 5 ) Attach two thrust washers (7) to front

c o u n t e r b o r e in rear face of rotor gears. Place

end of blower with bolt (6).

g e a r s on end of the shafts with missing serra-

(6) Attach three spacers (5) and thrust plate

t i o n in alignment with missing serrations on

(4) to front end of blower with three bolts (3).

shaft.

Tighten bolts to 7-9 ft.-lb. torque and check the

clearance between thrust plate and thrust

( 8 ) Tap the gears lightly with a soft ham-

mer to seat the gears on the shaft. Then, rotate

w a s h e r . The clearance should be 0.001-0.003

inch.

the gears until punch marks on the face of gears

match. If the punch marks on the face of gears

( 7 ) position the rotors so that the missing

d o not match, reposition the gears.

serration on the gear end of the rotor shafts are

90 degrees apart. This is accomplished by posi-

(9) Wedge a clean cloth between the blower