Graco 3A2264A User's Manual
Contents
1. Tube Size Length Tag in in mm Function A1 1 4 61 1550 Pilot air to switch on Unit A air motor A2 1 4 180 4572 Pilot air to switch on Unit B air motor C1 3 8 6 5 165 Bypass air Unit A C2 3 8 6 5 165 Bypass air Unit B M1 1 4 49 1245 Main air to 4 way valve P1 1 4 180 4572 Pilot air to switch from Unit B to A P2 1 4 7 178 Pilot air to switch from Unit A to B V1 1 4 12 305 Supply air to limit valve Unit A V2 1 4 49 1245 Supply air to limit valve Unit B Schematics 17 Parts Parts Tandem Supply System D200 003 Supply System A Supply System B 001 3A2264A 18 Quantity 24M226 KIT 24M227 KIT upgrade 20 1 upgrade 20 1 pxover 55 gallon pxover 55 gallon Ref Part Description carbon stainless 001 CM7AS59 SUPPLY UNIT 20 1 0 volt d200 1 CM7C58 SUPPLY UNIT 20 1 0 volt d200 1 002 257377 KIT pump outlet check 2 255452 KIT pump outlet check carbon steel 2 003 255675 KIT pneumatic cross over 1 1 004 24F726 HOSE assy 3 4id female male sst 1 24M225 HOSE coupled 1801 3 4id 1 005 C19661 BUSHING reducing 2 006 124406 FITTING adapter 3 4npt x 12jic 3 15M863 FITTING connector male 1 007 801787 FITTING tee pipe 3 4 1 113833 TEE pi2. 229 229 TI10941A 22 r 257373 313529 2a 3A2264A Parts Pneumatic Crossover Kits continued Level Switch Assembly 255675 214 215 TI10942A Level Switch Assembly 257373 211 210 214 215 r 257373 313529 la 3A2264A 23 Parts Pneumatic Crossover Kits Ref Part 201 111337 202 C20487 203 C59752 204 113218 205 C12508 206 C19683 207 115240 208 115436 209 116658 210 211 212 104116 213 111820 214 C19204 215 100179 216 C06182 217 100813 218 C19965 219 100068 220 100072 221 100016 222 101682 223 224 113338 225 123366 226 CO06061 228 100139 229 597151 230 110475 231 C12509 232k 114958 233 104969 235 100896 Not shown Not for sale 24 Description Qty TEE street 3 4 npt m x 3 4 npt f x 3 4 npt f 2 NIPPLE hex 3 4 npt 2 VALVE pneumatic 3 way 2 VALVE ball vented 3 4 npt m x f 2 HOSE nylon 3 8 in 10 mm OD 6 in 153 mm AR black BUSHING reducing 3 4 npt m x 3 8 npt f 4 FITTING tube 3 8 npt m x 3 8 in 10 mm OD tube 2 ELBOW tube 90 3 8 npt m x 3 8 in 10 mm OD 2 tube FITTING tube 1 4 npt m x 1 4 in 6 mm OD tube BRACKET crossover BRACKET limit valve for D200 rams BRACKET limit valve for S20 rams WASHER plain 10 SCREW cap socket hd 10 24 x 3 4 in 19 mm WASHER lock 10 NUT hex mscr 10 24 VALVE limit air WASHER flat SCREW cap socket hd 6 32 x 1 1 4 in 81
3. reducing 1 1 2 npt X 1 1 4 npt fbe COUPLING reducing 1 1 2 in npt x 1 in npt fbe 255455 Shown r 255455 313529 1f 25 Technical Data Technical Data Max air input pressure supply system psi MPa bar Air inlet size 520 3 in single post 5 gal 20L 125 0 9 9 1 2 npt f D200 3 in dual post 55 gal 200 L 30 gal 115 L 16 gal 60 L 8 gal 30 L 5 gal 20L 150 1 0 10 3 4 npt f Max fluid air working pressure and weigh displacement pump For Check Mate pump packages see manual 312376 Pump Wetted parts For Check Mate displacement pumps see manual 312375 Ambient operating temperature range supply system 32 120 F 0 49 C Sound Re See separate air motor manual 26 3A2264A Technical Data 3A2264A 27 Graco Standard Warranty Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale to the original purchaser for use With the exception of any special extended or limited warranty published by Graco Graco will for a period of twelve months from the date of sale repair or replace any part of the equipment determined by Graco to be defective This wa
4. FITNESS FOR A PARTICULAR PURPOSE Graco s sole obligation and buyer s sole remedy for any breach of warranty shall be as set forth above The buyer agrees that no other remedy including but not limited to incidental or consequential damages for lost profits lost sales injury to person or property or any other incidental or consequential loss shall be available Any action for breach of warranty must be brought within two 2 years of the date of sale GRACO MAKES NO WARRANTY AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IN CONNECTION WITH ACCESSORIES EQUIPMENT MATERIALS OR COMPONENTS SOLD BUT NOT MANUFACTURED BY GRACO These items sold but not manufactured by Graco such as electric motors switches hose etc are subject to the warranty if any of their manufacturer Graco will provide purchaser with reasonable assistance in making any claim for breach of these warranties In no event will Graco be liable for indirect incidental special or consequential damages resulting from Graco supplying equipment hereunder or the furnishing performance or use of any products or other goods sold hereto whether due to a breach of contract breach of warranty the negligence of Graco or otherwise FOR GRACO CANADA CUSTOMERS The Parties acknowledge that they have required that the present document as well as all documents notices and legal proceedings entered into given or instituted pursuant he
5. hose and pump Fluid supply container follow local code Solvent pails used when flushing follow local code Use only conductive metal pails placed on a grounded surface Do not place the pail on a nonconductive sur face such as paper or cardboard which interrupts grounding continuity To maintain grounding continuity when flushing or relieving pressure hold metal part of the dispense valve firmly to the side of a grounded metal pail then trigger the valve 10 Pressure Relief Procedure NOTE Refer to FiG 2 on page 8 for the following proce dure 1 Turn off the air motor slider valve BF on both ram A and B 2 On both ram A and B turn off the main air slider valve BA Set the ram director valve BC to the down position The ram will slowly drop 3 Perform Pressure Relief Procedure of the HFR system See manual 3A2175 4 On both ram A and B open the drain valve and or the pump bleed port Have a container ready to catch the drainage If you suspect that the spray tip nozzle or hose is com pletely clogged or that pressure has not been fully relieved after following the steps above very slowly loosen the tip guard retaining nut or hose end coupling and relieve pressure gradually then loosen completely Now clear the tip nozzle or hose 3A2264A Startup Flush Before Using Equipment The pump was tested with lightweight oil which is left in the fluid passages to prot
6. mm WASHER lock spring 6 NUT hex mscr 6 32 WASHER lock 1 4 SCREW cap socket hd 1 4 20 x 5 8 in 16 mm PLATE mounting 4 way valve VALVE air remote 4 way SCREW cap socket hd 10 24 x 1 1 8 in 29 mm MUFFLER PLUG pipe 1 8 npt ELBOW tube 1 8 npt m x 1 4 in OD tube TEE street 1 8 npt m x 1 8 npt f x 1 8 npt f TUBE nylon 1 4 in 6 mm OD 52 ft 15 9 m black A STRAP tie BUSHING reducing for S20 rams BUSING reducing DNBRUISDNONSSOOBBRBRNBOBRNNND 3A2264A Pump Outlet Check Valve Kits 255452 used on carbon steel Check Mate 60 and 100 Displacement Pumps shown Parts 257377 used on stainless steel Check Mate 60 and 100 Displacement Pumps 257377 15M863 Ref Description 255452 401 UNION pipe 1 1 4 in npt f 521975 CONNECTOR 3 4 npt m x 1 in unf 402 NIPPLE hex 1 1 4 in npt C20490 NIPPLE hex 1 1 4 in npt NIPPLE reducing 1 in npt x 3 4 npt 403 VALVE check 1 1 4 in npt fbe VALVE check 3 4 npt fbe 404 ELBOW street 90 1 in npt m xf ELBOW 3 4 npt m x f 40 LI A A 403 404 3A2264A TI10888A Ref E Description 255452 257377 ELBOW 1 1 2 in npt f x f 405 BUSHING reducing 1 in npt m x 3 4 npt f C19661 NIPPLE reducing 1 1 4 in npt x 1 in npt NIPPLE reducing 1 in npt x 3 4 npt BUSHING
7. two pump air motors to run at any given time unless the pilot valve is bypassed To manually activate the air motor open the bypass ball valve FIG 1 item L Other system functions are not effected by the tandem con trols 1 Follow the procedure defined in the supply system manual for shutdown 12 Prime If the pump being primed is not the active pump it will be necessary to activate the air motor by opening the bypass ball valve FIG 1 item L 1 Follow the procedure defined in the supply system manual for priming 2 After priming close the bypass ball valve to allow the level sensors to shutdown the air motor 3A2264A Troubleshooting TNR S A NOTE Refer to the Supply System Repair Parts manual for specific ram troubleshooting Refer to the Check Mate Pump Packages manual for pump troubleshooting Troubleshooting 1 Follow Pressure Relief Procedure page 10 before disassembling any part of the supply system 2 Disconnect power before repairing the supply sys tem Check all possible problems and causes before dis assembling the supply system Problem Cause Verification Solution Does not crossover Alternate ram has an empty sensor activated Verify ram has material Replace empty drum Alternate pump is not primed Verify alternate ram is ready to run Prime pump Level switch no
8. A2264A Startup 10 Move to the current Active ram and lower it to the bottom 11 Verify that the cross bar contacts and actuates the Air Limit Valve when lowered and that the Ram Crossover occurs NOTE The motor of the ram lowered should stop and become Inactive and the opposite ram motor should begin to cycle becoming Active 12 Verify that the Bypass Prime function works on the Inactive ram by opening the Bypass Prime ball valve The Inactive ram motor should begin to cycle the Active ram should continue to cycle 13 Close Bypass Prime ball valve 14 Lower the Active ram to the bottom Verify that Ram Crossover does not occur NOTE When an Active ram is lowered while the Inactive ram is still lowered a crossover should not occur A crossover in this condition could be caused by an air leak unequal supply line pressures or a problem with the 4 way Remote Air Valve 15 Raise the opposit ram 16 Verify that crossover occurs when the Air Limit Valve is deactivated Lower the same ram and verify that Ram Crossover does NOT occur 17 Startup Complete 11 Shutdown Shutdown Q Turning the system OFF relieves pressure from the pump motor It does not depressurize the fluid pres sure Follow the Pressure Relief Procedure page 10 The tandem supply controls do not effect essential sys tem operation The tandem controls act to allow only one of the
9. S20 supply system See manual 3A2175 Attempts to integrate with other systems may not be functional and may require additional parts To Be Installed with Existing Supply Model Description System 24M226 Tandem Crossover Kit 20 1 55 gallon Carbon Steel CM7A59 24M227 Tandem Crossover Kit 20 1 55 gallon Stainless Steel CM7C58 24M228 Tandem Crossover Kit 20 1 5 gallon Carbon Steel CM7A3C 24M229 Tandem Crossover Kit 20 1 5 gallon Stainless Steel CM7C3F 3A2264A Overview Overview Kit Description Each tandem supply kit consists of one single air pow ered ram supply system and supply hose as well as all the components necessary to configure all pneumatic tandem supply system controls This kit must be added to an identical single ram supply system identified with the model information with supply hoses to make up a complete tandem supply unit This kit is intended only for use with HFRS systems that include a D200 or S20 supply system See manual 3A2175 Attempts to inte grate with other systems may not be functional and may require additional parts Keep clear of the inactive ram as automatic crossover may occur unexpectedly To repair or adjust the ram first follow all steps of the Pressure Relief Procedure on page 10 3A2264A 5 Overview Pneumatic Crossover System Components NOTE D200 and S20 sizes are used in pneumatic cross over sys
10. Setup Parts G Z GRACO HFRS Tandem Supply System Kit a For use with non heated bulk supply of medium to high viscosity sealants and adhesive materials For professional use only Not approved for use in European explosive atmosphere locations 125 psi 0 9 MPa 9 bar Maximum Air Inlet Pressure S20 3 in rams 150 psi 1 0 MPa 10 bar Maximum Air Inlet Pressure D200 3 in rams Important Safety Instructions e Read all warnings and instructions in manual 3A2175 Save all instructions 24M226 Assembly Shown PROVEN QUALITY LEADING TECHNOLOGY Contents Related Manuals 3 Models 4 2 vl lli lili Rig 4 Overview s ss kin cote eee b n a ee Reti 5 Kit Description 5 Pneumatic Crossover System Components 6 Integrated Air Controls 8 Air Line Accessories 8 I en 9 Ram Installation and Setup 9 Grounding 10 Pressure Relief Procedure 10 Startup ENNEN dE NEE dE 11 Shutdown ux cx un 12 Prime EDI Ne eee Pee 12 Troubleshooting 13 Repair 2 21 ERG 14 Ram Bepa enora ve exe REM 14 Pump Repair 14 Crossover Schematics 14 Schematics 15 Pneumatic Crossover 15 D200 Ram Tube C
11. ect parts To avoid contaminat ing your fluid with oil flush the pump with a compatible solvent before use See your pump manual for flushing directions 1 Perform Setup on page 9 2 Verify the following e That you have equal line air pressure supplied to both A amp B units within 5 psi 35 kPa 0 3 bar of each other e The Bypass Prime ball valves item L in FIG 1 page 7 are closed e That the air motor regulators are adjusted to 30 psi 210 kPa 2 1 bar To prevent pump seal damage adjust the pressure down if the motor cycles too rapidly during the follow ing test procedure 3 Position both A amp B units about half way up place in Neutral and open both motor isolation slider valves item BA in FIG 2 on page 8 4 Verify that only one ram unit motor cycles 5 Go to the Active ram with the cycling motor and lower it to the bottom 6 Verify that the cross bar contacts and actuates the Air Limit Valve when lowered and that the Ram Crossover occurs NOTE The motor of the ram lowered should stop and become Inactive and the opposite ram motor should begin to cycle becoming Active 7 Verify that the Bypass Prime function works on the Inactive ram by opening the Bypass Prime ball valve The Inactive ram motor should begin to cycle the Active ram should continue to cycle 8 Close the Bypass Prime ball valve 9 Raise the Inactive ram about half way and place in Neutral 3
12. not supplied Air Line Drain Valve not supplied Air Filter not supplied Bleed Type Air Shutoff Valve not supplied Solenoid Valve Ram A and B AA Cable from Ram A to Limit Switch A AB Cable from Ram A to Limit Switch B AC Main Crossover Cable from Ram A to Solenoid B lt s lt coH Overview Integrated Air Controls The integrated air controls include Main air slider valve BA turns air on and off to the system When closed the valve relieves pres sure downstream Ram air regulator BB controls ram up and down pressure and blowoff pressure Ram director valve BC controls ram direction Exhaust port with muffler BD Air motor regulator BE Controls air pressure to motor Air motor slider valve BF turns air on and off to the air motor When closed the valve relieves air trapped between it and the air motor Push the valve in to shutoff Remote DataTrak The air solenoid Y FiG 1 the air motor slider valve BF and the main air slider valve BA must be open for air to flow See Remote DataTrak Setup section in Supply Systems operation manual 313526 Blowoff button BG turns air on and off to push the platen out of an empty drum Fic 2 Integrated Air Controls Air Line Accessories See FIG 1 Air line drain valve U Air line filter V removes harmful dirt and mois ture from compressed air supply Second bleed type air valve W isolates air line accessories and su
13. onnection Diagram 16 S20 Ram Tube Connection Diagram 17 Partea ee O use aet 18 Tandem Supply System D200 18 Tandem Supply System S20 20 Pneumatic Crossover Kits 22 Pump Outlet Check Valve Kits 25 Technical Data 26 Graco Standard Warranty 28 Graco Information 28 3A2264A Related Manuals Component Manuals in U S English Manual Description 313526 Supply Systems Operation 313527 Supply Systems Repair Parts 312375 Check Mate Displacement Pumps Instructions Parts 312376 Check Mate Pump Packages Instruction Parts 312889 60 cc Check Mate Displacement Pump Repair Parts 312374 Air Controls Instructions Parts 3A2264A Related Manuals Models Models Check the identification plate ID for the 6 digit part number of your tandem system To order replacement parts see Parts starting on page 18 Each tandem supply kit consists of one single air powered ram supply system and supply hose as well as all the components necessary to configure all pneumatic tandem supply system controls This kit must be added to an iden tical single ram supply system identified with the model information with supply hoses to make up a complete tan dem supply unit This kit is intended only for use with HFRS systems that include a D200 or
14. pe female 1 008 122763 FITTING elbow straight 3 4npt 90 ss 2 122327 FITTING elbow street 2 009 6303 21 ADAPTER swvl jic12x3 4npt feamle male 2 124433 FITTING swivel 3 4nptx12jic male female sst 2 3A2264A Parts 19 Parts Tandem Supply System S20 Supply System A 003 005 Supply System B 20 3A2264A Quantity 24M228 KIT 24M229 KIT upgrade 20 1 upgrade 20 1 pxover 5 gallon pxover 5 gallon Ref Part Description carbon stainless 001 CM7A3C SUPPLY UNIT 20 1 0 volt s20 201 1 CM7C3F SUPPLY UNIT 20 1 0 volt 520 20 1 002 257377 KIT pump outlet check 2 255452 KIT pump outlet check carbon steel 2 003 257373 KIT pneumatic xover 1 1 004 24F726 HOSE assy 3 4id 1801 feamle male sst 1 24M225 HOSE cpld 1801 3 4id 1 005 C19661 BUSHING reducing 2 006 124406 FITTING adapter 3 4npt x 12jic 3 15M863 FITTING connector male 1 007 801787 FITTING tee pipe 3 4 1 113833 TEE pipe female 1 008 122763 FITTING elbow straight 3 4npt 90 2 122327 FITTING elbow street 2 009 6303 21 ADAPTER swivel jic12x3 4npt female male 2 124433 FITTING swivel 3 4nptx12jic male female 2 3A2264A Parts 21 Parts Pneumatic Crossover Kits 255675 for 3 in D200 Rams 257373 for S20 Rams Pilot Valve Assembly 255675 TI10932A N Typical Crossover Valve Pilot Valve Assembly 257373 Assembly
15. pply system for servicing Locate upstream from all other air line accessories Air relief valve attached to ram air regulator not visible automatically relieves excessive pressure 3A2264A Setup Ram Installation and Setup 1 Install and set up individual rams as explained in manual provided 2 Install outlet check valve assemblies on each ram Refer to page 25 3 Install pneumatic crossover kits components on each ram a See pilot valve assembly drawing on page 22 b Identify and locate the integrated air control module c Remove the air hose and air fitting from the top of the integrated air control module NOTE Leave the hose attached to the air motor on the other end d Install the pilot valve assembly on top of the integrated air control module as shown on page 22 e Install removed fitting from step c into port 1 of the pilot valve assembly f Remove plug located on the integrated air con trol moduel and replace it with a tube fitting See item 209 on page 22 g Install the crossover valve assembly on the ram cylinder as shown on page 22 This assembly will be installed on only one ram h Seetubing drawing on page 16 D200 Ram Tube Connection Diagram or page 17 S20 Ram Tube Connection Diagram for location of level switch assembly Install level switch assembly to the top of the ram cylinder as shown on page 23 Calibrate the switch to trip when the follower is about 2 in 51 mm abo
16. reto or relating directly or indirectly hereto be drawn up in English Les parties reconnaissent avoir convenu que la r daction du pr sente document sera en Anglais ainsi que tous documents avis et proc dures judiciaires ex cut s donn s ou intent s la suite de ou en rapport directement ou indirectement avec les proc dures concern es Graco Information For the latest information about Graco products visit www graco com TO PLACE AN ORDER contact your Graco distributor or call to identify the nearest distributor Toll Free 1 800 746 1334 or Fax 330 966 3006 All written and visual data contained in this document reflects the latest product information available at the time of publication Graco reserves the right to make changes at any time without notice Original instructions This manual contains English MM 3A2264 Graco Headquarters Minneapolis International Offices Belgium China Japan Korea GRACO INC AND SUBSIDIARIES e P O BOX 1441 e MINNEAPOLIS MN 55440 1441 e USA Copyright 2011 Graco Inc All Graco manufacturing locations are registered to ISO 9001 WWW graco com
17. rranty applies only when the equipment is installed operated and maintained in accordance with Graco s written recommendations This warranty does not cover and Graco shall not be liable for general wear and tear or any malfunction damage or wear caused by faulty installation misapplication abrasion corrosion inadequate or improper maintenance negligence accident tampering or substitution of non Graco component parts Nor shall Graco be liable for malfunction damage or wear caused by the incompatibility of Graco equipment with Structures accessories equipment or materials not supplied by Graco or the improper design manufacture installation operation or maintenance of structures accessories equipment or materials not supplied by Graco This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of the claimed defect If the claimed defect is verified Graco will repair or replace free of charge any defective parts The equipment will be returned to the original purchaser transportation prepaid If inspection of the equipment does not disclose any defect in material or workmanship repairs will be made at a reasonable charge which charges may include the costs of parts labor and transportation THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF
18. t adjusted to trip properly Verify level switches acti vate at desired low level point Adjust level switch 3A2264A 13 Repair Repair Ram Repair See manual 313527 for ram and platen repair proce dures and replacement parts Pump Repair See pump manuals for pump repair procedures and replacement parts See manual 312796 for air motor repair procedures and replacement parts Crossover Schematics See page 15 for a schematic of pneumatic crossover systems 14 3A2264A Schematics Schematics Pneumatic Crossover H2LIMS T3A31 g WV GADE 1Old 310W38 go E e te cz YO Bo ZE Ta H2LIMS T3 31 V INTEGRATED AIR CONTROL 15 3A2264A Schematics D200 Ram Tube Connection Diagram 16 Tube Size Length Tag in in mm Function A1 1 4 36 914 Pilot air to switch on Unit A air motor A2 1 4 180 4572 Pilot air to switch on Unit B air motor C1 3 8 6 5 165 Bypass air Unit A C2 3 8 6 5 165 Bypass air Unit B M1 1 4 20 508 Main air to 4 way valve P1 1 4 180 4572 Pilot air to switch from Unit B to A P2 1 4 68 1727 Pilot air to switch from Unit A to B V1 1 4 68 1727 Supply air to limit valve Unit A V2 1 4 68 1727 Supply air to limit valve Unit B 3A2264A 20 Ram Tube Connection Diagram 3A2264A
19. tems FiG 1 shows a pneumatic crossover system Refer to manual 313526 supplied for ram installation and oper ating instructions The pneumatic crossover operates as follows During system operation as the ram approaches the drum bottom the top of the ram contacts the limit switch E The limit switch shuts off air to the air motor via a solenoid valve Y which stops air flow to one motor and starts air flow to the other air motor This allows continu ous material flow and changing of material drums The position of the limit switch E on the ram deter mines when the air motor is turned off Start by position ing the limit switch to trip when the ram platen D is 1 in 25 mm from the bottom of the drum During operation the position may be adjusted as desired The bypass valve L allows you to prime the inactive pump after a drum change Open the valve to prime the pump Close the valve when priming is complete and during normal operation 3A2264A Typical Crossover System Diagram a GES 9 S ani EL lo TKA Q H ER ER Aa S S20 Ram Shown J Fic 1 Component Identification Pneumatic Crossover Overview TI11160A Key to FiG 1 Ram A Ram B Pump Ram A and B Platen Ram A and B Limit Switch Ram A and B Integrated Air Controls Ram A and B see page 8 Bypass Valve Ram A and B Fluid Line not supplied Or TImoOOU 3A2264A Main Air Line
20. ve the ram base 3A2264A Setup k Tube the system using the appropriate D200 or S20 tubing drawing NOTE The table on the drawing shows tubing cut lengths Using longer tube lengths will require additional tubing not provided 4 When tubing is complete slowly extend rams to the full up and full down positions and take note how the tubing moves 5 Secure tubing in place with tape or wire ties To avoid machine damage and ensure proper oper ation verify tubes are not pinched kinked or pulled taught where they are secured when the rams are raised or lowered Pressure Relief Procedure Grounding Zw no The equipment must be grounded Grounding reduces the risk of static and electric shock by providing an escape wire for the electrical current due to static build up or in the event of a short circuit Pump use ground wire and clamp supplied Loosen grounding lug locknut and washer Insert ground wire end into lug slot and tighten locknut securely Connect ground clamp to a true earth ground Air and fluid hoses use only electrically conductive hoses with a maximum of 500 ft 150 m combined hose length to ensure grounding continuity Check elec trical resistance of hoses If total resistance to ground exceeds 29 megohms replace hose immediately Air compressor follow manufacturer s recommenda tions Dispense valve ground through connection to a prop erly grounded fluid
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