Here is a translation for you. I have no experience with distributors and don't know if the article makes any sence, just a translation.
Regards, Mike

Cleaning Fuel Distributor
For proper cleaning distributor has to be disassembled. In addition ultrasonic cleaner is used.

Disassembly:
- Remove EHA
- Remove screws connecting top and bottom sections of the distributor

Picture

-Using hex socket 19 mm remove the nut and remove plunger
- Carefully separate top and bottom portions, taking care not to damage the membrane
- Using dial indicator measure positions of the set screws in the bottom differential chambers and write it down

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- Put upper portion in the ultrasonic cleaner for 15 minutes, then turn it around and clean additional 10 min. All channels and filters clean by now. Blow with compressed air.
- Repeat same procedure with the bottom portion. Keep in mind that set screws might turn and lose adjustment.
- Using dial indicator, set the screws to the measured positions
- Prior to final assembly distributor has to be completely dry.

Assembly
- Put O-rings on the plunger, oil with clean motor oil all O-rings and mating surfaces and carefully without excessive force put plunger into the upper part of the distributor.
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- Put cups and springs on the set screws, membrane and ceramic plates with the springs
- Connect top and bottom portions
ATTENTION: When connecting top and bottom take care not to pinch o-ring on the plunger

- Put assembled distributor on the air plate, connect all pipes except those to the injectors
- Activate fuel pump and check distributor for leaks. When disk is pushed, gas should leak out of each chamber simultaneously, release disk and gas should fully stop.

- Connect hoses and suitable containers for checking each chamber
- Check distributor in three modes: Idle, Partial Load, and Full Load. The volume of fuel should be the same, and after 30 seconds at full load there should be about 70 - 100 ml in each container. Make sure the volume difference is less than +/- 2%.
If necessary, each chamber can be adjusted with the set screws.
Now if necessary, injectors can be checked for the pattern and flow rates.