HF-7-600 Page 23
20. The number measured in step 19 should be .004 - .005
“. If it is less than this then shims equal to the
difference must be installed on the shaft of that rotor.
21. Lower the rotor and remove the eye bolt. Remove the false bearing. Install the required amount of shims
(13) as determined in step 20 onto the idler rotor shaft.
22. Repeat steps 19 through 21 for the drive (long) rotor.
23. Apply oil to the drive and idler rotor bearing bores in the air cylinder.
FIGURE 7-3 – PRESS BEARING ONTO ROTOR SHAFT
24. Place the air cylinder vertically in a hydraulic press with the gear end on top. The bottom of the idler rotor
shaft must be in contact with the bed of the press. The bottom of the drive rotor shaft must not be in contact
with the bed of the press. The blower air cylinder must be cradled on its sides but must not be restrained in
the vertical direction. Place a ball bearing (14) over the rotor shaft with the numbers on the bearing facing up.
Press the bearing onto the idler rotor shaft using the hydraulic press and the bearing driver tool
(EQ143807-1). See FIGURE 7-3.
25. Repeat step 24 for the drive rotor bearing. In this step the bottom of the drive rotor shaft must be in contact
with the bed of the press and the bottom of idler shaft must not be in contact with the bed of the press.
FIGURE 7-4 – INSTALL BEARING RETAINING SCREWS
26. Install the 4 bearing retaining screws (10) and washers (12) into the gear end of the air cylinder. The screws
should have a loctite patch. Tighten the screws to 38 ft-lb. See FIGURE 7-4.
