"Camel" Liquid Ring Medical Vacuum
Medical Systems
B-9
Before disassembling the pump the following must be done:
1.
Isolate, lock, and tag-out all sources of electrical input.
2.
Isolate, drain and bleed the pump and piping.
3.
Disconnect the suction, discharge, and service liquid lines.
B.6.2.1 Disassembly Procedure
To disassemble the vacuum pump:
a.
Disconnect piping from air inlet and discharge and the liquid compressant inlet ports. (See Figure 1-1)
b.
On stainless steel pumps, disconnect inlet and discharge flanges (138 and 139, Figure 9-1) from pump.
Remove and discard flange gaskets (138-3 and 139-3).
Note
The vacuum pump can be disassembled in place mounted on its base. If there is not enough room to remove pump
parts, proceed as follows: disconnect electrical connections to motor and remove four motor mounting bolts. Lift
vacuum pump and place on a sturdy net work surface. Make sure that the motor feet are flat on work surface with
head (103, Figure 11-1) and lobe (106) flanges overhanging end of work surface. Clamp or bolt the feet of the
motor to the work surface.
c. Remove drain plug (22, Figure 11-1) and drain
all
liquid from the pump.
d. Remove eight head screws (103-1) from head (103).
e. Lift off head (103) and head gasket (103-3) from lobe (106). Discard gasket (103-3).
Note:
Check that the gap between the OD of rotor (110) and shroud bore of lobe (106) does not exceed 1/32 inch (0.8
mm). Check inside the face of the head for score marks between inlet and outlet ports. Score marks running from
inlet to outlet ports 1/16 inch (1.6 mm) or deeper are not acceptable. Check rotor to ensure that the blades are not
damaged or bent. Refer to Section B.8.3.
f. Wedge balled-up rag between rotor (110) and lobe (106). Turn rotor counterclockwise until rag is
jammed and prevents rotor from turning.
CAUTION
DO NOT ALLOW ROTOR (110) TEMPERATURE TO EXCEED 350°F (177°C) WHEN
PERFORMING THE FOLLOWING STEP.
g. Using propane torch and 350°F (177°C) temp stick, heat rotor nut (110-1) and hub area to temperature
of 300° to 350°F (149° to 177°C) to loosen Loctite 262 applied during assembly.
h. Using socket wrench, remove rotor nut (110-1). Remove rotor washer (110-2).
i. On all iron pumps, remove four, lobe nuts (106-1) securing lobe (106) to the pedestal or motor.
WARNING
Use gloves when handling heated parts to avoid burns.
