37-1-615 Page 37
SECTION 7
ASSEMBLY INSTRUCTIONS
NOTICE
Illustrations for Assembly Instructions are taken from variations in construction of some parts
should not cause concern.
NOTICE
Numbers in parentheses ( ) refer to key numbers in assembly drawings on pages 31 and 32.
The CycloBlower® is manufactured with close tolerances for efficient operation. All parts must be
handled carefully to prevent burrs which will give false clearance readings and/or rapid wear.
All parts and oil passages must be thoroughly cleaned of dirt which will cause galling of close running
parts. Clean work area, washing tank, tools, and wiping rags must be provided.
Refer to Parts List, Section 5 pages 31 and 32, for sectional views showing complete assembly of parts.
NOTICE
The following illustrations are of a standard blower with top inlet, bottom discharge, main rotor
discharge end drive. Some variations will be noticed in the following illustrations for blowers of
other arrangements.
There may be cases where foreign materials have entered the blower, or other causes have resulted in
galling of the rotor ends, carrier faces, rotor lobes, or housing walls. Since the blower is designed with no
contact of parts within the rotor chambers, these parts may be cleaned and polished for reuse unless
galling is severe. Reuse of parts severely galled may result in loss of blower efficiency. All damaged
parts which have been reworked should be checked for run-out or warpage before reuse.
Assembly of the
“R” Series CycloBlower differs from earlier models in the approach to installing the oil
seals. On previous models the installation of the lip seals into the bearing carriers was the first step in the
assembly process. This was acceptable for seals with compliant lips but the hydrodynamic lip seals are
made of Teflon and could be damaged by mishandling. On the
“R” Series, the lip seals are not installed
into the bearing carriers until after the rotors have been assembled. This requires that the lip seal is
slipped over the rotor shaft so a hollow cylindrical pusher is needed as well as a short installation sleeve.
1. Oil the O.D. of the rotor shaft seals (18, 19) to prevent seizure and press into each bore of
the carrier (5) (FIGURE 7-1). NEVER REUSE SHAFT SEALS. Refer to
“Rotor Shaft Seals,”
page 29, for an explanation. A simple press utilizing a bolt and two bars, one across the seal
and one underneath across the bearing bore, is an effective method for installing the seal.
Tightening the nut on the bolt presses the seal into place. Press the seal .010
” to .015”
below the face of the carrier to prevent the end of the rotor from rubbing the end of the seal.
A simple method is to place a .010
” to .015” shim on the end of the seal under the press bar
which will allow the seal to be pressed the correct distance below the face of the carrier.
Handle the seal with care to prevent damage to the babbitt lining.
2. To ease assembly in later steps, fit the bearing spacers (16, 17) to the seals (18, 19)
(FIGURE 7-2). Be sure there are no burrs on the spacer O.D. and seal I.D. The spacer
should be SLIP FIT in the seal. A sloppy fit will cause excess air leakage and decrease
blower efficiency. Do not drive the spacer through the seal as damage to the babbitt will
result. It may be necessary to polish high spots from the seal I. D. to allow slip fit of the
spacer. USE CROCUS CLOTH, not emery cloth.
Inspect polished area of the spacer. Any imperfections may result in oil seal leakage. When
spacers are fitted, apply Loctite 620 to the gear end shaft extension of the rotor in the area
where the spacer will be located. Slide the spacer on the shaft extension with grooved end
toward the rotor.