Acuum, Aintenance – Wood’s Powr-Grip MRTA811LDC User Manual

Page 27

Rev 9.0/6-12

MRTA8-DC: #35075

ACUUM

UMP

AINTENANCE

(for Dynaflo pump no. 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

(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

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.