Vacuum Pump Maintenance - Woods MRTA611LDC Instructions Manual

V P
ACUUM UMP
(for Thomas pump nos. 107BA20964, 107BD20964 & 107CDC20)
WARNING: Before proceeding with any maintenance, disconnect power source.
If the vacuum pump (14) takes too long to attain full vacuum, it may require maintenance.
Replace the diaphragm, valve flappers or head gasket as necessary to obtain acceptable pump
performance.
Replacing the Diaphragm (13)
1) Remove the four head screws (1) and remove the head (2).
2) Remove the four diaphragm hold-down screws (10) and the diaphragm
hold-down plate (12)
3) Replace the diaphragm (13) and reverse the above procedure for
reassembly.
Replacing the Intake Valve Flapper (11)
1) Remove the four head screws (1) and remove the head (2).
2) Remove the intake valve flapper screw (8) and the intake valve keeper
(7).
3) Replace the intake valve flapper (11) and reverse the above procedure
for reassembly.
Replacing the Exhaust Valve Flapper (5) and Head
Gasket (15)
1) Remove the four head screws (1) and remove the head (2).
2) Turn the head upside-down and remove the four valve plate screws
(9).
3) Lift out the valve plate (6) to access the exhaust valve flapper and
15
head gasket.
4) Remove the exhaust valve flapper screw (3) and the exhaust valve
keeper (4), and replace the exhaust valve flapper (5).
5) Replace the head gasket (15) and reverse the above procedure for reassembly.
1 HEAD SCREWS
2 HEAD
3 EXHAUST VALVE FLAPPER SCREW
4 EXHAUST VALVE KEEPER
5 EXHAUST VALVE FLAPPER
15
CAUTION:
Depending on the product, the vacuum system may require the valve plate (6) to be rotated to an orientation
different from the one shown. When removing the valve plate, always take note of its orientation in the pump head (2), and
install the valve plate the same way during reassembly. In all cases, the valve plate must be oriented so that its intake hole is
matched with the head port that connects to the check valve.
Rev 3.0/10-06
M
AINTENANCE
.
6 VALVE PLATE
7 INTAKE VALVE KEEPER
8 INTAKE VALVE FLAPPER SCREW
9 VALVE PLATE SCREWS
10 DIAPHRAGM HOLD-DOWN SCREWS
QUADRA-TILT ROTATOR • DC-VOLTAGE
11 INTAKE VALVE FLAPPER
12 DIAPHRAGM HOLD-DOWN PLATE
13 DIAPHRAGM
14 VACUUM PUMP
15 HEAD GASKET
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