35
08
Disassembly and Reassembly
Operator’s Manual 2009 Rev B p/n 2009
Seal/Lube Series 5 or Series 19/86:
Start
sleeve over shaft (larger diameter down)
while forcing O-ring into step at the bottom of
the sleeve. Slide sleeve down the shaft until
seated. You may encounter interference as the
sleeve passes through the PTFE rings. Tap
sleeve with mallet to seat if necessary.
Seal/Lube Series 8, 9, or Series 55/82/66/69:
Grease internal O-ring of mating ring portion
of seal. Assemble mating ring over sleeve
with lapped surface down. Slot in mating ring
must line up with pin in sleeve and be flush
with top of sleeve when properly installed.
Clean lapped surface of mating ring with soft
tissue and acetone. Lubricate surface and start
sleeve over rotor shaft while forcing O-ring into
step at bottom of sleeve. Carefully slide this
assembly down the shaft until seated.
10. Coat the rotor shaft with an anti-seize lubricant
and press the bearing on the shaft. The
bearing manufacturer numbers and/or an acid
dot (inner race) should be up or toward the
gears. Use the same plates that were used for
disassembly and a sleeve to press on the inner
race of the bearing when installing.
11. Loosen cap screws holding non-drive end plate
to housing. Install bearing retainer rings and
secure with cap screws. Check clearances
between the rotor lobes and gear end plate.
See Assembly Clearances on page 40
for correct gear end clearances. If clearances
are not within specification, re-check parts
to find cause of improper clearances before
proceeding. Retighten the cap screws on the
non-drive end, but do not torque at this time.
12. Install keys into rotor shafts, ensuring a tight
fit. Coat shafts and key with anti-seize. If new
gears are being installed, disassemble gear
shell from hub.
13. Heat the gear hubs to 350°F (177°C). At this
temperature, the hubs should fit easily to the
rotor shafts.
After heating, handle gear hubs with insulated
gloves only.
Secure with lock washers and lock nut
immediately after hub is installed. Torque to
proper specification. Do not install gear shell
until hub has been allowed to cool.
Free End Assembly
14. Turn assembly over and support on blocks.
Remove the six cap screws and put jack
screws in the holes provided in the flange
of the end plate and remove the plate. Take
out two shims and check free end clearance
between the end of the lobes and housing
using a flat bar and feeler gauges or a depth
micrometer.
See Assembly Clearances on
page 40
.
Seal/Lube Series 5 or Series 19/86:
Repeat
step 9 to install sleeves.
15.
Seal/Lube Series 8, 9, or Series 55/82/66/69:
Re-check carbon of seal to be sure it is clean.
All series:
Reinstall end plate, making sure
O-ring is still in its groove and secure with all
the cap screws.
16.
Seal/Lube Series 8, 9, or Series 55/82/66/69:
Repeat step 9 to install sleeve and mating ring
assemblies.
17. Install bearing spacers, and then repeat
step 10 to install bearings. Secure with lock
washers and lock nuts. Bend one lock washer
tap into spanner nut slot to lock all nuts.
18. Install oil retainer rings and cap screws (only
six required).
19. To install mounting feet, make sure the hollow
dowel is in the feet. If any of the dowels are in
the end plate, remove and transfer to the feet.
Grease and install the O-ring over the dowel.
Run a bead of silicone sealer 1/4 in. wide
around the dowel holes on the foot mounting
pad of the end plate. The sealer acts as a
backup O-ring to prevent any oil leakage.
Secure with cap screw. Reconnect oil pipes
and stand unit on its feet.
