BLOWER REPAIR (cont.) -726030159

TM 9-2320-360-34-2

20-2. BLOWER REPAIR (CONT)

NOTE

There are 12 measurements for

checking clearance between rotor

lobes and housing, 6 from air inlet

side and 6 from air outlet side.

(51) Place 0.0015 in. (0.38 mm) feeler gage between

one lobe of rotor (8) and housing of blower (10).

(52) Rotate rotors and position gage between one

rotor lobe (31) and housing of blower (10).

(53) Remove feeler gage from between rotor (8) and

housing of blower (10).

(54) Repeat steps (51) thru (53) for other two lobes

of rotor (8) and three lobes of rotor (9).

(55) If clearance is not correct, replace housing of

blower (10).

(56) Position blower (10) so air outlet side is facing

up.

(57) Place 0.005 in. (0.13 mm) feeler gage between

one lobe of rotor (8) and housing of blower (10).

(58) Rotate rotors to position feeler gage between

one rotor lobe (31) and housing of blower (10).

(59) Remove feeler gage from between rotor (8) and

housing of blower (10).

(60) Repeat steps (56) thru (59) for other two lobes

of rotor (8) and three lobes of rotor (9).

(61) If clearance is not correct, replace basic blower

(10).

(62) Position blower (10) with air inlet side up.

(63) Remove four screws (30) and washers (29) from

rear end plate (1).

20-14