15
6) Lubricate shafts and press the double row ball bearings (9) onto
rotor shafts and into end plate bores.
CAUTION:
These bearings have been flush ground at the
factory. The inner race will have a black dot etched on the
surface. This dot must be up and visible when bearings are
installed. Secure with bearing retainers (14), and socket head
screws (30).
7) Check clearance between the face of the end plate and rotor
lobes. See exploded view for correct gear end clearances. If
clearances are not within specifications, recheck parts to find
cause of improper clearances before proceeding.
8) Install spacer (17) (.260 thickness) on one shaft and spacer (18)
(.200 thickness) and oil slinger (20) on the other shaft.
NOTE:
Oil slinger and its spacer should always be mounted on
lower rotor for horizontal flow units. It can be mounted on either
shaft for vertical flow units.
Install timing shim in same location as found in disassembly.
This does not necessarily insure the unit will be in proper time.
Adjustments can be made later in the assembly process.
9) Insert gear keys (24) in their proper location and flush with top of
shaft. Use the two keyways facing to the right. Tight fit
required. Coat shafts and keys with lubricant. Install drive gear
(right hand helix) on drive rotor (left side). To install driven
gear, align reference marks as shown in Figure 6B. Install driven
gear carefully to avoid mashing any teeth when engaging
opposite gear. Secure with spacers (57), washers (25), and flat
head allen screws (29).
NOTE:
All timing gears must be used in sets, as they are
matched and serially numbered.
10) Remove assembly from press and stand on work table with
gears facing downward. Place blocks under end plate to prevent
assembly from falling over. Drive gear should remain on left
side.
11) Place small bead of sealer around the periphery of the end plate,
encircling each bolt hole. Install rotor housing (3) and secure
with 4 screws evenly spaced.
12) Check clearance between end of lobes and housing using a flat
bar and feeler gauges or a depth micrometer. Refer to exploded
view for free end clearances.
13) Place a small bead of sealer around the periphery of the housing,
encircling each bolt hole. Install free end plate and secure with 4
screws.
Installation of
Timing Gears
Housing and Free
End Assembly
