JVP

Take bolts of bearing retainer on both sides off, and remove paper liners and retainer.

NEVER BREAK THE LINERS.
Keep the liners in order so that they are placed in their original positions when reassembling.

Remove fastening bolts on the side plate B or side plate of fan side.

Fix side plate puller on a bearing retainer.

Keep bearing retainer and liners removed like in Step 1.
DO NOT TIGHTEN BOLTS BUT LEAVE THEM LOOSE.

(Gap between side plate B and bearing retainer must be about 1mm)

Take Vanes out of pump. Keep them orderly because they must be put back to their original positions.

Push the rotor out from the opposite side of the motor using a side plate puller.
Hold the shaft by hand or make the pump stand upright in order to protect the rotor from dropping when taking it out.

Be careful NOT TO INJURE THE SHAFT, CYLINDER & OTHER PARTS.

Take the clamping bolts out of the side plate A on the opposite side of motor.
Next remove the side plate A, letting the pin loose by screwing the removed two bolts, if equipped.
Clean each parts with a cloth soaked up with solvent.

Be careful NOT TO LET THE BEARING COME IN CONTACT WITH THE CLEANING SOLVENT.
REMEMBER: Keep spacers, bearings and side plates in proper order.

Make the rotor stand upright, and put side plate A on opposite side of motor, bearing and other parts back to the shaft.

DO NOT FORGET TO PUT SPACER COLLAR BACK TO ITS PLACE.

Knock bearing down with a bearing punch. Use wooden plate or the like as a pedestal in order to avoid injury to the shaft.

Restore the assembled rotor into cylinder.

FIX PIN CORRECTLY, and TIGHTEN BOLTS.
Mind the direction of rotation.

Insert vanes. Replace them as they were, paying attention to their original order and direction.

Reassemble Side Plate B.

FIX PIN CORRECTLY, and press bearing down. Tighten bolts.

Press BEARING, SPACERS and ROTOR with a bearing punch until all surfaces of the assembly come in contact tightly.

Tighten bolts of bearing retainer on both sides. The bolts are three on each side

If replacing liner/shims, a dial indicator helps to correct center rotor between sideplates inside of cylinder. Find distance by pushing and pulling rotor shaft (with bearing retainer loose) and individually and equally, set the distance with the shims/liners. The rotor should have equal distance on each side.

Confirm results of your servicing. Rotate the rotor shaft by hand by pushing it or pulling it toward you.

MAKE SURE ROTOR & SIDE PLATES DO NOT COME IN CONTACT WITH EACH OTHER.

You have done it well if they do not touch.