"Camel" Liquid Ring Medical Vacuum
Medical Systems
B-12
Note
If the motor is not mounted on a base, clamp or bolt the motor feet to a sturdy flat work surface so that lobe (106)
flange will overhang edge of work surface when installed.
CAUTION
Make certain that lobe (106) is centered on shaft and not cocked when performing the
following step. Ceramic stationary seal (2-2) can be damaged and made unserviceable by
contact with shaft shoulder or edge of shaft sleeve (114) if lobe (106) is cocked.
h. Position lobe (106) with nameplate pad at top and carefully slide lobe over shaft (301 or 402).
i. Install and tighten four lobe nuts (106-1) securing lobe to motor.
j. On all iron pumps:
1.
Apply small amount of light oil (not grease) to rubber bore of rotating seal (2-1) and shaft
sleeve (114) and shaft shoulder. Clean and oil sealing face of rotating seal with dean light oil
(not grease).
2.
Prepare 1-1/4 inch pipe nipple for sizes MHF 50, MHF 80, or a 2-inch pipe nipple for size
MHF 120, approximately 6 inches (152 mm) long. File one end flat and square with pipe axis
and chamfer the inner diameter on same end approximately 1/32 inch (0.8 mm) by 45
degrees.
3.
Slide rotating seal (2-1) over shaft (301 or 402) up to shaft shoulder with shaft sleeve (114),
center rotating seal and start it onto shaft sleeve by hand.
4.
Slide nipple prepared in step j.2 over shaft (301 or 402) and center flat end of the nipple
against the lip of the rubber driving band of the rotating seal. (See Figure 5-10.) Push
squarely and firmly on nipple until sealing face of rotating seal contacts sealing face of
stationary seal (2-2). End of rotating seal (2-1) should be approximately 1/16 inch (1.6 mm)
beyond shaft shoulder.
5.
Make certain that the rubber driving band is not extruded or otherwise deformed. If the
rubber driving band is deformed, remove rotating seal (2-1) carefully by hand and repeat step
j.4.
6.
Clean shaft extension beyond rotating seal, key-way and threads of shaft (301 or 402), shaft
key (1104), bore and keyway in rotor (110), rotor washer (110-2) and threads of rotor nut
(110-1) with Oakite Safety Solvent. Allow solvent to dry.
7.
Apply coating of Loctite 262 to rotor key (110-4) and insert rotor key into keyway in shaft.
8.
Install seal spring (2-3) over shaft. Insert folded thickness of tissue or paper between end of
seal spring and rotating seal. Push seal spring against rotating seal retainer with tissue or
paper wedge, so seal spring stays in position centered on shaft. (See Figure 5-11.)
9.
Apply coating of Loctite 262 to bore and keyway of rotor (110).
10.
Install rotor on shaft.
11.
Apply coating of Loctite 262 to both faces of rotor washer (110-2) and install rotor washer on
shaft.
12.
Wedge balled-up rag between rotor (110) and lobe (106). Turn rotor clockwise until rag is
jammed and prevents rotor from turning.
13.
Apply sufficient Loctite 262 to wet threads of shaft.
14.
Place rotor nut (110-1) into 1-inch socket (for sizes MHF 50, MHF 80) or 1-1/16 inch socket
(for size MHF 120) mounted on short extension and fill interior of nut with Loctite 262.
15.
Install rotor nut on shaft using care to minimize amount of Loctite 262 that is spilled.
16.
Tighten rotor nut to 45 to 50 foot-pounds (61 to 68 N·m) on sizes MHF 50, MHF 80, and to
85 to 90 foot-pounds (115 to 122 N·m) on sizes MHF 120.
