胶泵维修方法.pdf

Instruction Sheet 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual 41 2300 IS 23 P N 321 247A Repair Instructions for the SP Pump WARNING Allow only qualified personnel to perform the following tasks Follow the safety instructions in this document and all other related documentation Position the magnetic fork at the top of its stroke remove the pump according to the instructions in your melter manual and secure the pump in a vise To replace the air valve it is necessary to remove the actuator and air cylinder assembly from the pump body These components are part of the upper pump assembly To Remove the Actuator and Air Cylinder Assembly 1 Remove the four hex head cap screws and washers from the air cylinder head 4131113A 1 2 4 5 3 Fig 1Removing the Actuator and Air Cylinder 1 Air cylinder head 2 Air cylinder head O ring 3 Actuator and air cylinder assembly 4 Can 5 Hex head cap screw and lock washer 1 Pump Repair Procedures Replacing the Air Valve 2 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual41 2300 IS 23 To Remove the Actuator and Air Cylinder Assembly cont d 2 Remove the air cylinder head from the actuator and air cylinder assembly 3 Check the O ring on the air cylinder head for damage Replace if necessary 4 Remove the actuator and air cylinder assembly from the pump mount by lifting up on the assembly and pulling the can of the air cylinder away from the fork To Remove the Magnet Assembly from the Actuator 1 Remove the two socket head screws securing the can to the actuator 4131120A Fig 2Removing the Can from the Magnet Assembly 2 Pull the can straight off of the actuator 3 Pull the magnet assembly away from the upper detent 4 Place a suitable tool into the small hole at the top of the magnet assembly to prevent it from rotating 4131118A Fig 3Removing the Magnet Assembly from the Actuator 4131119A 1 2 3 5 6 9 8 7 4 3 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual 41 2300 IS 23 5 Loosen the valve spool nut from the top of the valve assembly NOTE When loosening the nut from the top of the valve assembly the magnet assembly may loosen before the valve spool nut does If this occurs simply unscrew the magnet assembly and set it aside 6 Remove the valve spool nut and bumper assembly from the top of the valve assembly 7 Place a wrench on the flats of the valve spool to prevent it from rotating 8 Unscrew the magnet assembly and set it aside To Remove the Valve Spool and Sleeve WARNING The valve spool is extremely delicate Do not allow the valve spool to fall out of the assembly or to get dirty Failure to observe this warning will damage the valve spool and require that it be replaced 1 Stand the air manifold vertically and carefully slide the valve spool from the top of the assembly Set the valve spool aside on a clean cloth or towel 2 Remove the two socket head screws securing the upper detent to the air manifold 3 Remove the upper detent and spring 4 Remove the socket head screws from the flange on the top of the air manifold 5 Press the sleeve out of the air manifold with a socket or similar object against the bottom of the sleeve NOTE The valve spool and sleeve are a matched set and cannot be exchanged with parts from another air valve assembly If replacement is needed they must both be replaced Fig 4Removing the Air Valve 1 Valve spool nut 2 Bumper assembly 3 Valve spool and sleeve assembly 4 Flange 5 Air manifold 6 Spring 7 Upper detent 8 Magnet assembly 9 Can 4 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual41 2300 IS 23 To Remove the Valve Spool and Sleeve cont d 6 Inspect the sleeve and spool for wear 7 If the spool lands are nicked gouged deeply scratched or corroded replace the valve assembly If they are not damaged but covered with contaminants clean the assembly and set it aside on a clean cloth or towel 4131121A 1 2 3 Fig 5Air Valve Components 1 Spool lands 2 Spool 3 Sleeve NOTE Take care not to scrape the spool or sleeve Clean them with mineral spirits or any non chlorinated cleaning solvent and a soft cloth Do not use abrasives such as sandpaper or emery cloth Be careful not to round off the sharp edges of the spool lands 8 Remove the O rings from the sleeve 9 Clean the sleeve and wipe the valve parts thoroughly with a clean cloth or rinse them with denatured alcohol 5 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual 41 2300 IS 23 To Re install the Valve Spool and Sleeve 1 Re install the upper detent Fasten with screws and tighten to 1 82 2 27 N m 16 20 in lb 2 Re install the spring 3 Remove the valve spool from the sleeve The valve spool can fall out during assembly and become damaged 4 Apply O ring lubricant to the new O rings and install them on the sleeve NOTE The top of the air manifold has two screw holes and the bottom has four screw holes 5 Lie the flange over the sleeve and press the sleeve into the top of the air manifold 6 Re install the flange Fasten with screws and tighten to 3 4 N m 28 36 in lb 7 Apply one drop of oil to each spool land Use only Nordson SP lubricating oil NOTE It is best to position the valve body vertically when inserting the valve spool into the sleeve CAUTION Carefully guide the spool into the sleeve Do not apply pressure Applying pressure to the valve spool can damage the valve assembly 8 Carefully reassemble the valve spool into the sleeve 9 Check that the valve spool slides freely in the sleeve If it does not replace the valve assembly 10 Check the bumper assembly for wear Replace if necessary 11 Place the bumper assembly on the top of the valve assembly and secure it with the valve spool nut 6 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual41 2300 IS 23 To Re install the Actuator and Air Cylinder Assembly 1 Holding the valve spool in place screw the threaded end of the magnet assembly into the valve spool until it seats 2 Place a suitable tool into the small hole at the top of the magnet assembly to prevent it from rotating 3 Holding the magnet assembly in place tighten the valve spool nut Tighten to 9 11 N m 81 99 in lb 4 Hold the bumper assembly against the flange and re install the can The cut out side of the can should face the circular part of the air manifold 5 Secure the can in place with screws Tighten to 3 4 N m 28 36 in lb NOTE Refer to Replacing the Piston Cups to remove the upper piston cup before installing the actuator and air cylinder assembly onto the pump This prevents damage to the upper piston cup Once the air cylinder and actuator are in place return the upper piston cup and washer to the assembly 6 Remove the upper piston cup and washer 7 Re install the air cylinder and actuator assembly on the pump 8 Re install the upper piston cup and washer 9 With the valve spool end centered in the opening of the cylinder head re install the cylinder head Secure with screws and tighten to 5 6 N m 45 55 in lb This procedure must be performed with the actuator and air cylinder removed If the actuator and air cylinder assembly are still installed on the pump refer to To Remove the Actuator and Air Cylinder Assembly 1 Check to be sure the fork is at the top of its stroke 2 Place a wrench on the flats of the piston to prevent it from turning Replacing the Piston Cups 7 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual 41 2300 IS 23 3 Loosen the nut above the piston cups and remove the two piston cups two piston cup washers and the piston cup seal from the piston 4 Install one piston cup washer one piston cup and the piston seal washer onto the piston in the proper order The curved edge of the piston cup should be pointing down 4131116A 3 2 3 2 1 Fig 6Piston Cups Piston Cup Washers and Piston Seal Washer 1 Piston seal washer 2 Piston cup 3 Piston cup washer 5 Carefully align the actuator and air cylinder assembly with the shifter fork and slide the assembly into place on the pump 6 Install the remaining piston cup and piston cup washer onto the piston The curved edge of the piston cup should be pointing up 7 With a wrench placed on the flats of the piston re install the nut and tighten to 11 30 13 56 N m 100 120 in lb 8 With the valve spool end centered in the opening of the cylinder head re install the cylinder head Secure with screws and tighten to 5 6 N m 45 55 in lb 8 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual41 2300 IS 23 The actuator and air cylinder assembly must be removed in order to replace the shifter fork If they are not already removed refer to To Remove the Actuator and Air Cylinder Assembly 1 Make sure the shifter fork is in the lower half of its stroke 4131115A 1 2 Fig 7Removing the Shifter Fork 1 Shifter fork2 Clamping screw and washer 2 Remove the clamping screw and washer from the shifter fork 3 Slide the fork toward the air motor and off the piston 4 Slide the new shifter fork onto the piston until it sits on the shoulder The side stamped UP must face the air manifold end of the pump 5 Insert the screw and apply torque of 8 10 N m 71 89 in lb 6 Move the piston up or down until the shifter fork is in the center of the pump mount 7 Replace the actuator and air cylinder assembly Refer to To Re install the Actuator and Air Cylinder Assembly Replacing the Shifter Fork 9 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual 41 2300 IS 23 The actuator and air cylinder assembly and the shifter fork must be removed in order to access the pump body If they are not already removed refer to To Remove the Actuator and Air Cylinder Assembly and Replacing the Shifter Fork 1 Straighten the lock tab on the tab lock washer 411117A Fig 8Removing the Lock Tab Nut and Washer 2 Loosen the locking nut and slide the nut and the tab lock washer away from the pump body 3 Pull the pump mount off of the pump body 4 Set the locking nut and the tab lock washer aside 5 Inspect the U cup seal and the O ring and replace if necessary 4103255 1 2 3 Fig 9Pump Mount Components 1 O ring 2 U cup seal 3 Retaining ring Cleaning or Repairing the Pump Body 10 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual41 2300 IS 23 To Remove the Hydraulic Piston Components CAUTION Risk of equipment damage Do not scratch the hydraulic piston or the inside of the pump body Scratches can cause the pump to leak 1 Use a retaining ring tool to remove the retaining ring at the top of the pump body 4130114 1 2 3 4 Fig 10 Hydraulic Shaft Components 1 Retaining ring 2 Washer 3 Pump seal 4 Hydraulic piston 2 Manually stroke the hydraulic piston up and down to loosen the washer and pump seal 3 Remove the seal and washer Inspect the seal and replace if necessary 4 Secure the pump body by placing an adjustable wrench on the wrench slots of the pump body or by placing the pump body into a vise 5 Remove the crossover tube Inspect the O ring and backup ring Replace if necessary 11 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual 41 2300 IS 23 4103181 1 2 3 4 Fig 11 Crossover Tube O Ring and Backup Ring 1 Crossover tube 2 O ring 3 Backup ring 4 Pump body To Remove the Siphon Ball and Pressure Ball Components 1 Unscrew the siphon ball seat from the pump body 2 Pull the siphon ball seat and its cage from the pump body 4103198 1 2 3 Fig 12 Siphon Ball Cage Siphon Ball and Siphon Ball Seat 1 Siphon ball cage 2 Siphon ball 3 Siphon ball seat 12 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual41 2300 IS 23 To Remove the Siphon Ball and Pressure Ball Components cont d 3 Pull the piston out of the pump body 4 Remove the pressure ball seat and the pressure ball from the piston by unscrewing the seat from the piston 4130113 1 2 3 Fig 13 Pressure Ball Seat and Pressure Ball 1 Hydraulic piston 2 Pressure ball 3 Pressure ball seat 5 Inspect both the pressure and siphon balls and their seats for wear or damage Replace if necessary WARNING Do not heat Type R solvent with an open flame or in an unregulated heating device Do not heat Type R solvent above 246 C 475 F 6 Heat a container of Type R solvent to the melting temperature of the adhesive being used Clean all components of the pump 4131122A 1 2 13 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual 41 2300 IS 23 To Re install the Siphon Ball and Pressure Ball Components 1 Insert the pressure ball into the plunger end of the piston 2 Apply Loctite to the threads of the pressure ball seat and screw it on to the piston Tighten the seat to 4 07 6 78 N m 3 5 ft lb 3 Insert the piston into the pump body 4 Place the siphon ball onto the siphon ball seat 5 Attach the siphon ball cage to the seat If the cage does not fit securely bend the legs of the cage slightly inward by hand 6 Apply Loctite to the threads of the seat and screw it into the pump body To Re install the Hydraulic Piston Components 1 Put the backup ring and O ring on the crossover tube Apply Never Seez lubricant to the threads of the crossover tube and screw it into the pump body NOTE All adhesives must be removed from the seal cavity and the retaining ring groove in the pump body before the seal is installed 2 Apply O ring lubricant to the pump seal Pull the piston up through the top of the pump body 3 Put the pump seal with the groove facing the pump body on the piston then put the washer on the piston 4 Slide the piston down to help guide the seal and washer into place in the pump body 5 Use a retaining ring tool to snap the retaining ring into place 6 If the U cup is being replaced insert the U Cup into the upper face of the pump mount with the groove facing up and install a new retaining ring to hold the U cup in place Fig 14 Pump Body and Hydraulic Shaft 1 Pump body 2 Hydraulic piston 14 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual41 2300 IS 23 To Re install the Hydraulic Piston Shaft Components cont d 7 Place the O ring over the air cylinder mount on the upper surface of the pump mount 8 Guide the upper part of the pump body and the piston through the bottom hole in the pump mount NOTE The piston must be inserted through the tab lock washer and the locking nut before it passes through the top hole in the mount 9 Secure the pump body to the pump mount with the locking nut Do not tighten There is a stop in the bottom of the pump bracket Rotate the pump body clockwise until it rests against the stop 10 Install the shifter fork onto the piston Refer to Replacing the Piston Fork 11 Install one piston cup washer one piston cup and the piston seal washer onto the piston in the proper order The curved edge of the piston cup should be pointing down Refer to Replacing the Piston Cups NOTE To prevent damage to the upper piston cup do not install the upper piston cup and washer before installing the air cylinder and actuator assembly on the pump 12 Install the actuator and air cylinder assembly onto the pump Refer to To Install the Actuator and Air Cylinder Assembly 13 Install the upper piston cup and washer 14 With the valve spool end centered in the opening of the cylinder head re install the cylinder head Secure with screws and tighten to 5 6 N m 45 55 in lb 15 Re install the pump in the melter and resume normal operation 15 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual 41 2300 IS 23 To order parts call the Nordson Customer Service Center or your local Nordson representative Use this five column parts list and the accompanying illustration to describe and locate parts correctly The number in the Item column corresponds to the circled item number in the illustration that goes with the parts list A dash in this column indicates that the item is an assembly An NS indicates that the item is not shown on the illustration The number in the Part column is the Nordson part number you can use to order the part A series of dashes indicates that the part is not saleable In this case you must order either the assembly in which the part is used or a service kit that includes the part The Description column describes the part and some times includes dimensions or specifications The Note column contains letters that refer to notes at the bottom of the parts list These notes provide kit part numbers and other key information about the part The Quantity column tells you how many of the part is used to manufacture the assembly shown in the illustration An AR in this column indicates that the amount of the item required in the assembly is not quantifiable ItemPartDescriptionQuantityNote 000 000Assembly1 1000 000 Subassembly2A 2000 000 Part1 If you order the assembly items 1 and 2 will be included If you order item 1 item 2 will be included If you order item 2 you will receive item 2 only 2 Parts 16 Repair Instructions for the SP Pump 2000 Nordson Corporation All rights reserved 321 247A Issued 9 00 Manual41 2300 IS 23 Use the following parts list to order parts for this pump See Figure 15 ItemPartDescriptionQuantityNote 161 424Pump piston 14 1 SP 30 11005247 Bracket cover pump SP 14 1 6 11 2982 059 Screw socket head M4 x 84 3983 402 Washer flat narrow M42 4983 403 Washer lock split M42 51006027 Valve assembly SP1 6900 493 Lubricant Parker hi tempAR 7333 560 Spring wave SP pump1 8155 057 Detent upper SP1 9166 880 Fork magnetic assembly1 10164 606 Actuator magnetic assembly SP1 11155 068 Can SP1 12155 067 Detent lower SP1 13986 714 Retaining ring internal 156 bowed1 14155 059 Piston pump 14 1 SP1 15985 302 Pin roll 0 125