CAMCORP Blower Package with Roots Blower - Manual (Page 35)

12 For your nearest ROOTS Office, dial our Customer Service Hot Line 1 877 363 ROOTS (7668).
bar with recessed end that will bear on the outer
metal edge of seal enclosure. Seal lip should
point toward the driving tool. Seals to be flush
without board bore face. Apply a light coat of oil or
grease to the seal lips. In a similar fashion, install
lip seals into the drive end headplate.
8. Place cylinder on a flat surface. Assemble gear
end headplate to cylinder after checking flange
punch marks. Drive in the two locating dowel pins
before tightening flange screws. Also install gear
end foot using the same longer cap screws (32)
and washers (41). (On 6” & 7” UNIVERSAL RAI
®
blower install both gear end feet.)
9. Place the assembly horizontally on steel blocks
with gear end headplate on bottom. The height
of the blocks should be sufficient to clear gear
end shaft extensions. Assemble impellers into
the cylinder with the drive shaft (longer shaft)
in same location as in original assembly. Before
starting the shafts through the headplate holes,
make sure shaft ends have no sharp or rough
edges to damage seal lips. Position impellers at
90° to each other in the cylinder, using lobe-and-
waist match marks if original impellers are being
re-installed. Install drive end headplate and feet in
same manner as gear end.
10. It is recommended that new bearings be used for
rebuild. Apply thin film of machine oil on the shaft
bearing fit, bearing I.D., and headplate bearing
bore. Install drive end bearings into headplate.
Use a tube with flanged end that will contact both
bearing faces simultaneously. Refer to Assembly
Drawing for proper bearing depths.
NOTE: Cylindrical drive bearing should be
installed with inner race large shoulder
facing outboard.
11. Place blower on its feet on a flat surface.
Loosen feet capscrews (32) and square up unit.
Re-tighten capscrews (32). Clamp unit down to
a solid base for further assembly.
12. Oil the gear end bearing fits as described
previously. Install 2-1/2” thru 5” blower gear end
bearings flush with the headplate bearing
shoulders using proper drivers. On 6” & 7”
gear diameter units, install thrust washer
(29) in bearing bores then install gear end
bearings so they protrude 1/16” (1.6mm) above
headplate surface.
13. Install bearing clamp plates (34). On 6” & 7”
gear diameter units, blower impeller end
clearances are also to be set during this step.
Install clamp plates (34) with capscrews (31)
making sure that the gap between the clamp plates
and the headplate is even all around. At the same
time, set end clearances per Table 5.
14. Install gears and time impellers as in (A).
6. Check the end clearances between impellers and
headplates. Adjust clearances per B-15 below.
7. When clearances are correct, clean and re-install
the gearhouse. Check condition of flange gasket
(7) and replace if questionable. Fill gearhouse to
correct level with proper grade oil.
B – Replacing Shaft Bearings and Impellers
Remove coupling or sheave from the drive shaft.
Drain and remove gearhouse, and pull the timing
gears. If gears are to be re-used, mark them so
they may be returned to the same shafts.
1. Break corners and deburr the keyway. Remove
bearing end cover at the drive end. Remove
bearing clamp plates (34).
2. Make single and double identifying punch marks
on the mating edges of headplate and cylinder
flanges at the two ends of the blower.
3. At the drive end, drive out the two dowel pins and
remove all capscrews holding headplate to
cylinder. By inserting jacking screws into the two
threaded flange holed, and turning them in evenly,
the headplate will be separated from the cylinder.
As the headplate comes off the shafts it will bring
bearings with it. 2-1/2” and 3-1/2” gear diameter
units do not have tapped holes for jack screws in
the drive end headplates. Remove dowel pins and
all capscrews holding headplate to cylinder and
foot on the drive end. Support unit under gear end
cylinder flange with the shafts vertical. Using soft
metal block against gear end shafts, push them
out of gear end headplate.
4. For 2-1/2” and 3-1/2” gear diameter units, support
the drive end headplate on the underside, and
using soft metal block against drive end shafts,
push them out of drive end headplate.
For 4”, 6” & 7” gear diameter units, from the gear
end, using a wood or soft metal block against the
ends of the shafts, drive them out of the head
plate. If they are to be reused, protect them from
damage in this operation.
5. If blower interior surfaces need cleaning, it may be
advisable to separate the gear end headplate from
the cylinder. Use the same general procedure as
employed at the drive end.
6. Working from the back (flat) face of each head
plate, push or tap out the bearings and seals. Use
a round bar or tube that will pass through the shaft
clearance holes in the headplates. All lip seals will
be damaged during removal and must be
replaced.
7. Clean bearing and seal pockets in headplates and
remove burrs or rough edges. (Apply a thin coating
of sealant on seal O.D.) Press new seals (27) into
gear end headplate using a round tube or