CAMCORP Blower Package with Roots Blower - Manual (Page 39)

16 For your nearest ROOTS Office, dial our Customer Service Hot Line 1 877 363 ROOTS (7668).
the headplate bores. Generally, new seals will be
required prior to reassembly.
6. Remove the bearing inner race and sleeve (38)
from the shaft with the aid of a bearing puller by
inserting the puller jaws in the groove in the sleeve
and applying the jacking screw against the end of
the shaft. Protect the threaded hole and the end
of the shaft with a small, flat spacer between the
shaft and the puller.
ASSEMBLY
Prior to any assembly operation, it is essential that all
parts are completely clean and free from nicks and
scratches.
Prior to assembly, lightly coat the groove in the sleave
with slip plate. ROOTS P/N813-314-000.
1. Assembly of Piston ring seals (28) – To avoid
scratching the lip seal surface, install the Piston
ring seals (28) in the sleeves (38) from the end
nearest the groove before assembling the sleeve
on the shaft.
Unhook the gap joint and expand the ring while
sliding it to the groove, then compress it so one
end of the hook joint slides over the other. Move
the ring in the groove to be sure it is free.
NOTE: Care must be taken not to scratch or dent
the sleeve surface since it is the sealing surface
for the lip seal.
2. Installation of sleeves (38) – heat the sleeve to
300° F. (149°C) then quickly slide it on the shaft
tightly against the impeller. If the sleeve hangs up
during assembly, it can be pressed into place
using a tubular pressing tool with square,
clean ends.
3. Assembly of seals (27) in headplate (1) – Place
headplate flat with seal bores up. Be sure the
pressing tool face is clean and square and there is
a smooth, clean entering bevel in the headplate.
Lubricate the seal lips. Place seal over the bore
with lip facing up, then press the seal evenly until it
is flush with bore face.
For Gas Sealed Units: Assemble mechanical
seals (27) in headplate – (CAUTION: Care must
be used to avoid damaging the carbon face.
Before proceeding with this step, you should have
a piloted seal driver which is designed to clear
the carbon face.) with headplate positioned
horizontally with seal bores up. Be sure the
pressing tool face is clean and square and there is
a smooth, clean entering bevel in the headplate.
Place the seal over the bore with carbon facing up.
Then press the seal evenly on its steel shell using
the piloted seal driver until the driver seats against
the stop.
4. Assembly of impellers (12 and 13) to headplate
(1) – Place gear end headplate flat on 3 in.
(76 mm) blocks with the smallest bores facing up.
Inspect entering bevels to be sure they are smooth
and clean. Locate the drive impeller correctly
(top for vertical units and toward the driver for
horizontal units). Place the seal ring gaps toward
the inlet for pressure applications and towards dis
charge for vacuum applications. Insert the impeller
shafts in the headplate so the impellers rest on
the headplate. Use care to avoid damaging the
lip seals.
5. Assembly of cylinder (11) to gear end headplate
(1) – Install dowel pins (16) and secure cylinder to
headplate with capscrews (23). Torque to 35 ft.-lbs
(4.5 Kg-m). Then, install drive end headplate (1)
and dowel pins (16) and secure with capscrews
(23). Install feet (76) & 77) to both headplates and
secure with capscrews (66). Torque to 35 ft.-lbs.
(4.5 kg-m).
For Gas Sealed Units: Use a Teflon sealant
between headplate and cylinder joint. Assemble
rotating seal – apply a light coating of oil to the
O-ring and seal face. Then with flute side out
install the rotating seat tight to the shaft sleeve.
Check and record seal compression – With the
seal body in place and the impeller against the
opposite headplate, check that seal compression
is adequate. This can be checked using a depth
gauge or dial indicator from the face of the head
plate to the face of the mating ring. First, measure
this distance while the carbon is out at its full
length. Then, push the mating ring back against its
stop and measure it again. The difference
between these measurements is the compression.
This can be done easily with finger pressure as the
spring force is only 10 lbs. The correct travel is
given below (record actual compression on
clearance sheets).
S EAL C OMPRESSION
Frame Minimum Maximum
400 .047” .097”
600 .108” .151”
* Prior to to assembly, lightly coat the groove in the sleave(38) with slip plate.
ROOTS ™ P/N 813-314-000
6. Installation of bearings (14) – Heat bearing inner
race to 300°F (149°C) in an oven or hot oil; then
slide it onto the shaft so the bearing shoulder is
snugly against the sleeve. Note: Be sure to install
the shaft shim (70) behind the shaft sleeve before
installing the drive end drive bearing inner race.
This is required to compensate for the oil leader for
shimming. Insert the bearing outer race and rollers
in each bore and tap lightly in place. Spray
bearings with lubricant.
7. Measure and record the end clearances between
the impellers and drive headplate using long feeler
gauges. Then, subtract the allowed average drive
end clearance. See Table 6. The result is the
space required between clamping plates (34) and
bearing outer race. Place shims (10) as required
to get this clearance. Then, fasten the clamping