HF-7-600 Page 22
10. Measure and record the total rotor to bearing housing end clearance for each rotor. This is accomplished by
using a depth micrometer to measure the distance from the top edge of the air cylinder to the top of the rotor
lobe while the rotor is held as vertically as possible.
11. Apply oil to the inside diameter of the 2 inserts in the bearing housing and to he outside diameter of the piston
rings on the drive end of both rotors. Place a ring guide tool (EQ143805) on the drive end of both rotor shafts.
12. Apply Loctite Gasket Eliminator 515 to the sealing surface of the air cylinder. Use a roller to spread the
gasket eliminator to an even coat.
13. Install 2 dowel pins (19) into the drive end of the air cylinder.
14. Install the bearing housing over the shafts of the rotors and onto the air cylinder. There is only one orientation
of the bearing housing which will allow the dowel pins to line up with their mating holes. Remove the ring
guide tool from each rotor shaft.
15. Attach the bearing housing to the air cylinder using 6 socket head screws (21) and washers (20). The screws
should have a nylok insert. Tighten the screws in an alternating pattern starting with the middle ones. Torque
the screws to 38 ft-lb in 2 steps.
16. Heat 2 seal flingers (34) to 275 degrees F. After heating use a gauss meter to check the flingers for
magnetism. The magnetic flux density must be less than one gauss. Use the flinger drive tool (EQ143806) to
drive them into position on the ends of the piston ring carriers of the drive end of both rotors. Be careful not
the damage the threads on the rotor shafts. Ensure each flinger is seated against the shoulder on the ring
carrier and that it is recessed below the end of the ring carrier.
17. Position the air cylinder vertically with the gear end on the top. Support the cylinder so that the rotor shafts
may extend through the bearing bores.
18. Heat 2 seal flingers (34) to 275 degrees F. After heating use a gauss meter to check the flingers for
magnetism. The magnetic flux density must be less than one gauss. Use the flinger drive tool to drive them
into position on the ends of the piston ring carriers of the gear end of both rotors. Ensure each flinger is
seated against the shoulder on the ring carrier and that it is recessed below the end of the ring carrier.
FIGURE 7-2 – MEASURE STEP IN FALSE BEARING
19. Put the false bearing (EQ144008) into the bearing bore for the idler (short) shaft. Screw an eye bolt into the
end of the idler rotor and lift the rotor until the ends of the rotor lobes contact the end surface of the air
cylinder. Using a depth micrometer measure and record the distance from the top surface of the outer ring of
the false bearing to the top surface of the inner ring. The inner ring of the false bearing should be above the
outer ring. See
FIGURE 7-2
.
