Wood’s Powr-Grip MRTA8HV11DC - Manual (Page 30)

Rev 10.0/9-13 28 MRTA8-DC: #35076
V
ACUUM
P
UMP
M
AINTENANCE
− D
YNAFLO
DV1032102
WARNING: Before proceeding with any maintenance, disconnect power source.
If the vacuum pump takes too long to attain full vacuum, it may require maintenance. Replace
the diaphragm, gasket/flap valves or (when preferable) the entire head assembly 21 (see
REPLACEMENT PARTS LIST), as necessary to obtain acceptable pump performance.
CAUTION: Do not over-tighten the head screws, because this may damage the
threads in the pump body.
Replacing the Diaphragm
1) Remove the four head screws (1) and lock washers (2), and remove the head assembly
(3―7).
2) Remove the diaphragm retaining screw (8), diaphragm (9) and rubber O-ring (10).
Note: Be sure to save the flat washer located between the O-ring and the connecting rod
(11). Also take note of the diaphragm orientation for reassembly.
3) Replace the diaphragm, rubber O-ring and diaphragm retaining screw. Reinstall the flat
washer in its original position.
4) Reverse the steps above for reassembly, as shown
in the illustration.
Replacing the Gasket/Flap Valves
1) Remove the four head screws (1) and lock washers
(2), and remove the head assembly (3―7).
2) Invert the head and remove the two valve plate
screws (7). Remove the valve plate (6) to access
the gasket/flap valves.
3) Replace the gasket/flap valves (5) and reverse the
steps above for reassembly, as shown in the
illustration. Use the alignment pin (15) to ensure
proper fit between the head and valve plate.
Replacing the Head Assembly
1) Remove the four head screws (1), lock washers (2)
and head assembly (3―7).
2) Replace the head assembly, and reverse the steps
above for reassembly, as shown in the illustration.
1 HEAD SCREW 5 GASKET/FLAP VALVES 9 DIAPHRAGM 13 WIRES
2 LOCK WASHER 6 VALVE PLATE 10 RUBBER O-RING 14 MOTOR
3 HEAD 7 VALVE PLATE SCREW 11 CONNECTING ROD 15 ALIGNMENT PIN
4 INTAKE PORT 8 DIAPHRAGM RETAINING SCREW 12 MOUNTING FOOT 16 EXHAUST PORT
21
CAUTION: Depending on the product, the head assembly (3―7) may be rotated to an orientation different from the one
shown. When removing the head assembly, always take note of its orientation and install it the same way during reassembly.
Make sure that the intake and exhaust ports remain in their original positions.