Instruction Sheet P/N 229782C Iso-Flo Coupling Repair Introduction This instruction sheet covers the repair of the male and female couplings used in the Automatic and Manual Iso-Flo HD Voltage Block Systems, using the male and female coupling repair kit. Male Coupling Repair See Figure 1. Materials Required Before you rebuild the male coupling, have the following ready: Repair kit O-ring lubricant (Parker O-Lube or equivalent) 1-1 / 4 in. open-end wrench or Nordson pump wrench adjustable wrenches pick or small flat-bladed screwdriver ruler 1 / 4 in. diameter brass or steel rod with rounded end Male Coupling Disassembly CAUTION: Use your free hand to prevent the shuttle block from twisting when loosening the coupling. This will prevent torque damage to the shuttle mechanism. 1. Unscrew the male coupling, using a 1-1 / 4 in. open-end wrench or a Nordson pump wrench, and remove it from the shuttle block. Turn the coupling counterclockwise. 2. Unscrew the coupling tip (1) from the adapter (9). 3. Remove the ball (5) and large spring (6). 2002 Nordson Corporation Manual 10-26
2 Iso-Flo Coupling Repair Male Coupling Disassembly (contd) 4. Using a pick or small screwdriver, remove the O-ring (4), flat washer (3), and tungsten O-ring (2) from the coupling tip. Do not mar the inside surfaces of the tip. 5. Push on the head of the pin (7) to compress the small spring (8) and relieve the tension on the retaining ring (13). 6. Remove the retaining ring, stainless steel flat washer (12), and nylon washer (11) from the end of the pin. 7. Remove the pin and small spring from the adapter. 8. Discard all parts except the coupling tip (1), pin (7), and adapter (9). Discarded parts are available in the coupling repair kit. 1 2 3 4 5 6 7 8 9 10 11 12 13 Must be less than 3 mm (1/8 in.) Apply O-ring lubricant part 900223 (Parker O-Lube) to all O-rings before installing. 13 Torque to 14 20 N m (10 15 ft-lb) when installing on adapter. 5 Torque to 14 20 N m (10 15 ft-lb) when installing on shuttle. 1 12 Install with rounded edge toward item 2 O-ring. 2 3 4 6 7 8 9 10 11 Figure 1 Male Coupling Repair 1. Coupling tip 2. Tungsten O-ring 3. Flat washer 4. O-ring 5. Ball 6. Large spring 7. Pin 8. Small spring 9. Adapter 10. O-ring 11. Nylon washer 12. Stainless steel flat washer 13. Retaining ring Male Coupling Assembly NOTE: Lubricate all O-rings with O-ring grease before installing them. 1. Install the the new tungsten O-ring (2) into the coupling tip (1). 2. Install the new flat washer (3) with the rounded edge toward the tungsten O-ring. Manual 10-26 2002 Nordson Corporation
Iso-Flo Coupling Repair 3 3. Install the new O-ring (4) into the groove inside the coupling tip. Set the coupling tip aside. 4. Slip the new small spring (8) over the pin (7). Insert the pin and spring assembly into the adapter (9), flat end of the pin first. 5. Push on the head of the pin to compress the spring and force the flat end of the pin out the end of the adapter. 6. Gently push the new nylon washer (11), flat side first, over the end of the pin. After the washer is started on the pin, use thumb pressure to force it against the pin shoulder. 7. Install the new stainless steel flat washer (12) on the pin. Lock the nylon washer and flat washer in place with the new retaining ring (13). 8. Grasp the end of the pin and pull it gently to make sure it moves freely against the spring pressure. 9. Install the new large spring (6) over the pin and spring assembly. 10. Drop the new stainless steel ball (5) into the coupling tip and thread the coupling tip onto the adapter. Tighten the coupling tip hand tight. 11. Measure the gap between the coupling tip and the top of the wrench flats on the adapter. This gap should be less than 3 mm ( 1 / 8 in.) If the gap is greater than 3 mm ( 1 / 8 in.), the coupling tip is not seated in the counterbore. Unscrew the coupling tip and reposition the flat washer (3) before using wrenches to finish tightening the assembly. 12. Tighten the coupling tip to approximately 14 20 N m (10 15 ft-lb). 13. Lubricate the new O-ring (10) and install it in the groove in the end of the adapter. 14. Check the coupling operation by inserting a smooth rounded rod into the tip of the male coupling to unseat the ball. Further insertion of the rod should start pushing the end of the pin out of the adapter. CAUTION: To prevent torque damage to the shuttle mechanism, use your free hand to prevent the shuttle block from twisting when tightening the coupling. 15. Thread the adapter clockwise into the shuttle block. Tighten the adapter to 14 20 N m (10 15 ft-lb). 2002 Nordson Corporation Manual 10-26
4 Iso-Flo Coupling Repair Female Coupling Repair See Figure 2. Materials Required Have the following ready: Repair kit O-ring lubricant (Parker O-Lube or equivalent) threadlocking adhesive (Loctite Removable 242 or equivalent) 1-1 / 4 in. open-end wrench or Nordson pump wrench adjustable wrenches small flat-bladed screwdriver #6 spanner wrench small tapered pin Female Coupling Disassembly CAUTION: Use your free hand to prevent the shuttle block from twisting when loosening the coupling. This will prevent torque damage to the shuttle mechanism. 1. Unscrew the female coupling, using a 1-1 / 4 in. open-end wrench or a Nordson pump wrench, and remove it from the shuttle block. Turn the coupling counterclockwise. 2. Pry the retaining ring (13) out of the threaded end of the body (9). 3. Remove the retaining ring, small spring (12), and ball (11). CAUTION: Do not damage the insert (3) during the next step. Any damage to this machined part will require replacing the entire coupling. 4. Insert a no. 6 spanner wrench into the holes on the head of the post (5). Place a wrench on the body flats to prevent it from turning. Unscrew the post from the body. NOTE: If the post is frozen in place, compress the large spring until the post protrudes far enough out of the insert (3) to grasp it with locking pliers and unscrew it. 5. Slide the body out of the sleeve (6) and remove the large spring (7). 6. Remove the O-rings (8, 10) from the body. 7. Unscrew the collar (1) from the sleeve, using the wrench flats on each. 8. Remove the PTFE O-ring (4), insert (3), O-ring (2), and post from the collar. Manual 10-26 2002 Nordson Corporation
Iso-Flo Coupling Repair 5 9. Discard all parts except the collar (1), insert (3), post (5), sleeve (6), and body (9). Discarded parts are available in the coupling repair kits listed in Parts. 1 2 3 4 5 6 7 8 9 10 11 12 13 1 Apply O-ring lubricant to all O-rings before installing. Apply O-ring lubricant to O-ring groove and shaft before assembling. Apply threadlocking adhesive part 900464 (Loctite Removable 242) to threads before assembling. Torque to 14 20 N m (10 15 ft-lb) when installing on shuttle. O-ring lubricant: Nordson part 900223 (Parker O-Lube) 2 3 5 4 6 7 8 11 9 12 10 13 Figure 2 Female Coupling Repair 1. Collar 2. O-ring 3. Insert 4. PTFE O-ring 5. Post 6. Sleeve 7. Large spring 8. O-ring 9. Body 10. O-ring 11. Ball 12. Small spring 13. Internal retaining ring Female Coupling Assembly NOTE: Lubricate all O-rings with O-ring grease before installing them. 1. Lubricate the O-ring grooves and shaft of the body (9). 2. Lubricate new O-rings (8, 10) and install them on the body. 3. Install a new PTFE O-ring (4) on the post (5): a. Lubricate a tapered pin with O-ring grease. b. Carefully push the PTFE O-ring onto the tapered pin, expanding the O-ring just enough so it will fit over the threaded end of the post. If you expand it too much you could crack it. 2002 Nordson Corporation Manual 10-26
6 Iso-Flo Coupling Repair Female Coupling Assembly (contd) c. Remove the PTFE O-ring from the tapered pin and install it over the threaded end of the post. 4. Lubricate a new O-ring (2) and install it in the collar (1). 5. Install the insert (3) in the collar. 6. Insert the head of the post through the hole in the insert. Gently push the PTFE O-ring into the counter-bored seat in the insert. Be careful not to cut the outside diameter of the O-ring on the edge of the counterbore. 7. Screw the sleeve (6) into the collar to firmly seat the PTFE O-ring in the counterbore. 8. Apply threadlocking adhesive to the threads on the post. Use the adhesive sparingly to avoid clogging the small holes in the body. 9. Slide the new large spring (7) over the sleeve and insert the body into the sleeve. 10. Push down on the collar to compress the spring and screw the post into the body. Tighten the post with a no. 6 spanner wrench. 11. Install a new ball (11) and small spring (12) into the threaded end of the body. 12. Press the new retaining ring (13) in the body, making sure that it is installed squarely and that the tangs are all within the shallow recess provided. 13. Inspect the assembly, especially the insert sealing lip inside the collar and surrounding the head of the post. Make sure the surface is smooth and free from nicks or burrs. 14. Push down on the collar to check the movement of the sleeve over the body. Compressing the large spring should cause the head of the post to protrude about 8 mm ( 5 / 16 in.) from its seated position. CAUTION: Use your free hand to prevent the shuttle block from twisting when tightening the coupling. This will prevent torque damage to the shuttle mechanism. 15. Screw the female coupling clockwise into the shuttle block. Tighten to 14 20 N m (10 15 ft-lb). Manual 10-26 2002 Nordson Corporation
Iso-Flo Coupling Repair 7 2002 Nordson Corporation Manual 10-26
8 Iso-Flo Coupling Repair Parts 2 3 4 5 6 7 8 10 11 12 13 Figure 3 Male Coupling Note: Phantom parts (dashed lines) are not serviceable. To replace them you must order a new coupling. 2 4 5 7 8 9 10 11 12 13 Figure 4 Female Coupling Note: Phantom parts (dashed lines) are not serviceable. To replace them you must order a new coupling. Manual 10-26 2002 Nordson Corporation
Iso-Flo Coupling Repair 9 Male and Female Coupling Repair Kit Item Figure 3 See Figures 3 and 4. Item Figure 4 Part Description Quantity Note 139401 Service kit, coupling, male and female 2 942020 O-ring, 0.25 x 0.50 in., tungsten 1 A 3 130343 Washer, flat, 0.625 in. x A 0.349 in. 4 940150 O-ring, hotpaint, 0.563 x 0.688 x 0.063 in. 5 11 900046 Ball, 302/316 stainless steel, 0.343 in. diameter, 100 6 - - - - - - Spring, compression, 1.25 x 0.360 x 0.040 in. 1 1 A 2 A 1 A, C 7 139389 Pin, valve, safety 1 A 8 987070 Spring, compression, 0.75 x 1 A 0.24 OD x 0.026 in. 10 10 945017 O-ring, hotpaint, 3 / 8 in. tube 2 A, B 11 983260 Washer, 0.312 x 0.151 x 1 A 0.062 in., nylon 12 983026 Washer, flat, 0.312 in. x 0.156 in. MS, stainless steel 13 986116 Retaining ring, external, 15, Reering 2 941120 O-ring, hotpaint, 0.50 x 0.688 x 0.094 in. 4 940305 O-ring, 106, PTFE, 0.174 x 0.103 in. 1 A 1 A 5 - - - - - - Post, coupling, C 7 130340 Spring, compression, 1.50 x 1.095 OD x 0.12 in. 8 941110 O-ring, hotpaint, 0.438 x 0.625 x 0.094 in. 9 246586 Body, post, coupling 12 130324 Spring, compression, 0.75 x 0.36 OD x 0.026 in. 13 986304 Ring, retaining, internal, 43, push on NOTE A: Noted parts are also available in the Male Coupling Repair Kit, part 234441. B: Noted parts are also available in the Female Coupling Repair Kit, part 234440. C: These parts cannot be ordered separately. 2002 Nordson Corporation Manual 10-26
10 Iso-Flo Coupling Repair Adhesives, Sealants, and Lubricants Use these adhesives and lubricants when repairing the couplings. Refer to the illustrations in this instruction sheet for application instructions. Part Description Quantity 900464 Adhesive, threadlocking (Loctite Removable 242) 1 900223 Lubricant, O-ring, Parker, 402 (Parker O-Lube) 1 Issued 1/02 Original copyright date 1997. Iso-Flo, Nordson, and the Nordson logo are registered trademarks of Nordson Corporation. Loctite is a registered trademark of Henkel Loctite Corporation. Manual 10-26 2002 Nordson Corporation