© Edwards Limited 2009. All rights reserved. Page 1
Edwards and the Edwards logo are trademarks of Edwards Limited.
A710-04-880 Issue D
Note: For earlier models with serial numbers prior to those listed above please contact Edwards.
Note: For serial numbers beyond those quoted please see amended instruction at the end of this publication.
1. Wipe area around drain tap. Open the discharge to atmosphere or alternatively wipe area around oil filler and
remove filler.
2. Fully drain oil into a clean suitable size container with a capacity of at least 4.5 litre (E1M40, E2M40), 7 litre
(E1M80, E2M80). (Illustration 1).
If the rotary pump has been used on an application generating toxic, volatile, corrosive or in any other way
hazardous contaminants proper safety precautions appropriate to the level of hazard should be taken when
draining the oil or working on any area allied to the lubrication system.
3. Undo and remove the six screws securing the outlet port side panel. Lift away the side panel (Illustration 2).
4. The next item to be removed is the motor assembly. Although there are dowels top and bottom to correctly
locate the motor assembly these should not be relied upon to take the weight of the assembly. Use suitable size
wood blocks under the motor assembly. Using a 6 mm Allen key undo and remove the four socket head screws
securing the motor plate to the pump body (Illustration 3).
5. Carefully separate the motor assembly from the pump body (Illustration 4).
6. Undo and remove the two Allen socket grub screws securing the driven half coupling and fan assembly to the
pump shaft. A 3 mm Allen key should be used for this (Illustration 5).
7. Insert one socket grub screw in free threaded hole and tighten. This will release the taper lock (Illustration 6).
8. Lift away taper lock and fan assembly (Illustration 7).
9. Undo and remove the socket plug at the end of the oil return port line (Illustration 8). Remove traces of thread
lock from the thread in the pump body.
10.Using a suitable size Allen key undo and remove the suction port socket plug on the side of the pump body.
Beware residual oil will drain out when the plug is removed. Remove traces of thread lock from the thread in the
pump body.
11.Fit an aluminium washer to the banjo bolt, insert bolt into union followed by the second aluminium washer
(Illustration 9).
12.Apply Loctite 275 to the banjo bolt thread and fit banjo assembly to the end of the oil return line (Illustration
10). Modification. If the return port is counterbored 16 mm x 1.3 mm deep insert Viton O-ring code number
H02123119 into counterbore prior to insertion of banjo bolt.
13.Apply Loctite 275 to the pipe adaptor and fit to end of union assembly (Illustration 11).
14.Apply Loctite 275 to the second pipe adaptor and fit to the suction port (Illustration 11).
15.Knock out the two circular sections and fit the side panel to the two tap adaptors. Secure in place with the 6
screws.
16.Slacken the elbow nut, push on to the pipe adaptor and tighten the securing nut (Illustration 12).
17.Apply Loctite 275 to the threads and fit the two disconnects to the elbows (male-top, female-bottom)
(Illustrations 13 and 14).
Pump From Serial Number To Serial Number
E1M40 720 1281
E2M40 3168 8301
E1M80 463 900
E2M80 1926 4674
