Servicing
Diaphragm pump N680 EX
38
Translation of Original Operation and Installation Instruction, english, KNF 325438 02/22
Checking the sprocket
Observe the intervals for the periodic inspection of the coupling play
(see operating instructions for the coupling).
1. Place the sprocket (
4
) on the motor-side coupling half (
5
).
2. Place the test adapter for the coupling on the motor-side coupling half (
5
).
3. Use the feeler gage to check the coupling play (see operating instructions
for the coupling).
4. Replace the sprocket (
4
) if there is too much coupling play (see operating
instructions for the motor).
5. Define the intervals for the periodic inspection of the coupling play (see
operating instructions for the motor).
Replacing the sprocket
1. Remove the worn sprocket (
4
) from the motor-side (
5
) or pump-side cou-
pling half (
6
).
2. Push the new sprocket (
4
) onto the pump-side coupling half (
6
).
The sprocket is symmetric and can be pushed on in both possible po-
sitions.
Installing the motor
1. Align the motor-side (
5
) and pump-side coupling halves (
6
) with one an-
other.
2. Place the motor (
3
) on the compressor housing (
7
).
Centering is performed using the four stud bolts (
8
) in the flange of the
compressor housing (
7
) as well as the previously inserted sprocket.
3. Check whether the flange surface of the motor (
3
) and the flange surface
of the compressor housing (
7
) lie properly on top of one another.
4. Push the four ribbed disks (
2
) onto the stud bolts (
8
).
Make certain that the inner diameter of the ribbed disk (
2
) lies against
the nut (
1
) and the outer diameter lies against the motor flange (
3
) (see
Fig. 11).
Fig.11 Alignment of the ribbed disk (
2
)
