Adjusting Rotor-To-Head Clearance - BeaconMedaes Lifeline Camel Installation, Operation And Maintenance Manual

"Camel" Liquid Ring Medical Vacuum
k. On stainless steel pumps:
1. Insert rotor key (110-4) into keyway in shaft.
2. Install rotor (110) on shaft.
3. Install rotor washer (110-2) on shaft. If
4. Wedge balled-up rag between rotor and lobe. Turn rotor clockwise until rag is jammed and
prevents rotor from turning.
5. Thoroughly lubricate shaft and rotor nut (110-1) threads with DTE medium machine oil or
equivalent.
6. Install rotor nut on shaft using 1-inch socket (for sizes MHF 50 and MHF 80) or 1-1/16 inch
socket (for size MHF 120) mounted on short extension. Remove any burrs. Tighten rotor nut
to 45 to 50 foot-pounds (61 to 68 Am) on sizes MHF 50 and MHF 80 and to 85 to 90
foot-pounds (115 to 122 Am) on size MHF 120.
1. Remove rag from between rotor and lobe.
m. Mount dial indicator on lobe with foot of indicator on face of rotor at OD. Check that runout of rotor
face does not exceed 0.004 inch (0.10 mm).
n. Loosen four lobe nuts (106-1) to allow 1/8-inch (3 mm) play.
Note
On all iron pumps, lightly grease head-mounting face of lobe and install approximately 0.030-inch (0.76-mm)
thickness of new head gaskets (103-3) when performing step o.
o. Install new head gasket (103-3) on lobe. Orient head (103) with cast name "NASH" at top and drain plug
hole at bottom and secure to lobe with eight head screws (103-1).
Note
On all iron pumps, make certain that reducer bushing (28) is installed in outlet port in head (103) on sizes MHF 50,
MHF 80.
B.6.5

Adjusting Rotor-to-Head Clearance

Make sure to apply and maintain 100 pounds force (445 Newtons) minimum to end of shaft
a. Determine thickness of shims (4, Figure 9-1) required to set running clearance between face of rotor
blades and inside face of head as follows:
Note
To check clearance on assembled pump, loosen four lobe nuts (106-1) to allow 1/8 inch (3 mm) play and remove
shims (4).
1. Remove cap from motor end bell. Mount mechanical puller at idle end of motor with puller
jaws engaging edge of fan shield or cast protusions for motor draw bolts, and puller screw
centered in end of motor shaft. Tighten puller to push motor shaft and rotor (110) as far as
possible towards head (103) to take up free end play in motor bearings. Then proceed to step
a.4.
2. Push assembled head and lobe firmly towards motor so that head contacts the rotor blade
ends. Tighten four lobe nuts (106-1) finger tight only to maintain contact.
CAUTION
when performing steps A through D.
B-13
Medical Systems