Read all of the instructions before proceeding.
Refer to Kadant Johnson assembly drawing for part identification and to drawing A37640 for torque specifications. For easy identification, parts used in individual steps are often accompanied with their position in the assembly drawing [e.g. gasket (8B)]. Tighten all fasteners in a star pattern. Certified drawings are available upon request. Dimensions are for reference only and subject to change.
Bend tabs back from support tube nut.
Unthread the support tube nut approximately 1/4" (6.4 mm). Place a block of wood over the support tube nut and strike it with a hammer. This will break the tapered seal inside of the rotary joint. Remove the support tube nut and set aside for reuse.
Important: Note the location of the indexing slot on the end of the support tube.
Remove the body and set aside with O-ring side up. Remove and discard the O-ring (26).
Remove the end cap assembly and seal ring. Place the end cap assembly with the seal ring surface facing up. If working on the dryer bearing, move the support tube into the journal.
Remove the ring bracket and wear plate.
Tip: If dryer bearing work is needed, remove the journal flange (if necessary) and bearing cover to access the bearing. Reinstall after bearing work is complete.
Note: There are two types of repair kits. If using the preassembled end cap assembly kit, proceed to step 12.
Place the assembly in a press with the seal ring surface facing up. Compress the nipple and remove the cap screws. Release the press and separate the nipple from the end cap.
Remove the O-rings and discard. Inspect the nipple groove(s) and sealing surfaces. Replace if damaged. Install and lubricate new O-rings.
Reinstall the nipple by placing over the springs and passing the torque tubes through the springs. Use a press to compress the nipple into the end cap. Lubricate the shoulder cap screws with Loctite® and install. Release the press.
Using a new gasket, reinstall the wear plate (8A) with cap screws (16A).
Tip: Pull the support tube out of the journal if it was pushed in during the previous step.
Install the ring bracket with cap screws (20C).
Clean the mating surfaces of the wear plate, new seal ring (6), and nipple. Attach the seal ring and end cap assembly with four cap screws (3C).
Important: After fastening the end cap assembly, confirm the "X" dimension is correct. Refer to the Kadant Johnson drawing.
If there is an O-ring present on the support tube, remove it. Lubricate and install a new O-ring with silicone lubricant. Apply anti-seize to the tapered portion of the tube.
Install a new O-ring (26) into the body. Position the body over the support tube. Align the pin(s) with the support tube indexing slots. Position both over the studs on the ring bracket and secure with hex nuts (20B).
Important: The indexing slot should be installed in the same position as noted in step 3.
Replace the O-ring located inside the large hollow bolt. Apply anti-seize to the threads of the support tube nut. Insert two bent lock washer tabs into the body and install support tube nut, torque to 400 ft-lbs (542 Nm). Bend two lock washer tabs over the bolt flats to prevent bolt loosening.
Place gasket (8) on head and install head on body with cap screws (2A). Connect piping.
R-9800PTX-1
