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m20nmdl3sm-rev0814 

 Model M20 Non-Metallic Page 10 

TROUBLESHOOTING

Possible Symptoms:

• 

Pump will not cycle.

• 

Pump cycles, but produces no flow.

• 

Pump cycles, but flow rate is 

unsatisfactory.

• 

Pump cycle seems unbalanced.

• 

Pump cycle seems to produce 

excessive vibration.

What to Check: 

Excessive suction lift 

in system.

Corrective Action: 

For lifts exceeding 

20 feet (6 meters), filling the pumping 

chambers  with  liquid  will  prime  the 

pump in most cases.

What to Check: 

Excessive  flooded 

suction in system.

Corrective Action: 

For  flooded 

conditions exceeding 10 feet (3 meters) 

of liquid, install a back pressure device.

What to Check: 

System head exceeds 

air supply pressure.

Corrective Action: 

Increase  the 

inlet  air  pressure  to  the  pump.  Most 

diaphragm pumps are designed for 1:1 

pressure ratio at zero flow.

What to Check: 

Air supply pressure or 

volume exceeds system head.

Corrective Action: 

Decrease inlet 

air  pressure  and  volume  to  the 

pump  as  calculated  on  the  published 

PERFORMANCE  CURVE.  Pump  is 

cavitating the fluid by fast cycling.

What to Check: 

Undersized  suction 

line.

Corrective Action: 

Meet  or  exceed 

pump connection recommendations 

shown  on  the  DIMENSIONAL 

DRAWING.

What to Check: 

Restricted or 

undersized air line.

Corrective Action: 

Install a larger 

air line and connection. Refer to air 

inlet recommendations shown in your 

pump’s SERVICE MANUAL.

What to Check: 

Check ESADS+Plus, 

the  Externally  Serviceable  Air 

Distribution System of the pump.

Corrective Action: 

Disassemble and 

inspect the main air distribution valve, 

pilot valve and pilot valve actuators. 

Refer to the parts drawing and air valve 

section  of  the  SERVICE  MANUAL. 

Check for clogged discharge or closed 

valve before reassembly.

What to Check: 

Rigid pipe connections 

to pump.

Corrective Action: 

Install  flexible 

connectors and a  surge suppressor.

What to Check: 

Blocked air exhaust 

muffler.

Corrective Action: 

Remove  muffler 

screen, clean or de-ice and reinstall. 

Refer to the Air Exhaust section of your 

pump SERVICE MANUAL.

What to Check: 

Pumped  fluid  in  air 

exhaust muffler.

Corrective Action: 

Disassemble 

pump chambers. Inspect for diaphragm 

rupture  or  loose  diaphragm  plate 

assembly.  Refer  to  the  Diaphragm 

Replacement section of your pump 

SERVICE MANUAL.

What to Check: 

Suction side air 

leakage or air in product.

Corrective Action: 

Visually inspect 

all  suction  side  gaskets  and  pipe 

connections.

What to Check: 

Obstructed  check 

valve.

Corrective Action: 

Disassemble  the 

wet  end  of  the  pump  and  manually 

dislodge obstruction in the check valve 

pocket.  Refer  to  the  Check  Valve 

section of the pump SERVICE MANUAL 

for disassembly instructions.

What to Check: 

Worn or misaligned 

check valve or check valve seat.

Corrective Action: 

Inspect  check 

valves and seats for wear and proper 

seating. Replace if necessary. Refer 

to  Check  Valve  section  of  the  pump 

SERVICE MANUAL for disassembly 

instructions.

What to Check: 

Blocked suction line.

Corrective Action: 

Remove  or  flush 

obstruction. Check and clear all suction 

screens and strainers.

What to Check: 

Blocked  discharge 

line.

Corrective Action: 

Check  for 

obstruction  or  closed  discharge  line 

valves.

What to Check: 

Blocked  pumping 

chamber.

Corrective Action: 

Disassemble 

and  inspect  the  wetted  chambers 

of  the  pump.  Remove  or  flush  any 

obstructions.  Refer  to  the  pump 

SERVICE MANUAL for disassembly 

instructions.

What to Check: 

Entrained air or vapor 

lock in one or both pumping chambers.

Corrective Action: 

Purge  chambers 

through  tapped  chamber  vent  plugs. 

PURGING  THE  CHAMBERS  OF 

AIR CAN BE DANGEROUS! Contact 

the  MARATHON  Technical  Services 

Department  before  performing  this 

procedure. A  model  with  top-ported 

discharge  will  reduce  or  eliminate 

problems with entrained air.

If your pump continues to perform 

below your expectations, contact your 

local MARATHON Distributor or factory 

Technical Services Group for a service 

evaluation.

WARRANTY

Refer to the enclosed MARATHON 

Warranty Certificate.

Summary of Contents for Warren Rupp MARATHON M20

Page 1: ...ervicing 19 Solenoid Shifted Air Valve Drawing 20 Solenoid Shifted Air Valve Parts List 20 Solenoid Shifted Air Distribution Valve option 21 Diaphragm Service Drawing Non Overlay 22 Diaphragm Service...

Page 2: ......

Page 3: ...tensile strength and impact resistance NEOPRENE All purpose Resistant to vegetable oils Generally not affected by moderate chemicals fats greases and many oils and solvents Generally attacked by stron...

Page 4: ...l E5 Solenoid Kit with 110VAC Explosion Proof Coil E6 Solenoid Kit with 220VAC Coil E7 Solenoid Kit with 220VAC Explosion Proof Coil E8 Solenoid Kit with 110VAC 50 Hz Explosion Proof Coil E9 Solenoid...

Page 5: ...minute BAR PSI HEAD NPSHR FEET METERS Displacement Per Stroke Flow Capacity 46 Gallons 1 74 Liters 0 160 Gallons Per Min 0 605 Lilters Per Min MODEL S20 Non Metallic Performance Curve Performance bas...

Page 6: ...ev0814 Model M20 Non Metallic Page 4 Dimensions M20 Non Metallic Dimensions in Inches in Millimeters Dimensional tolerance 1 8 3mm Note Porting Flanges are also available with PN10 50mm DIN bolting co...

Page 7: ...l M20 Non Metallic Page 5 Note Porting Flanges are also available with PN10 50mm DIN bolting configuration Dimensions M20 Non Metallic with Spill Containment Dimensions in Inches in Millimeters Dimens...

Page 8: ...ible hose reduces vibration and strain to the pumping system A surge suppressor is recommended to further reduce pulsation in flow AIR SUPPLY Air supply pressure cannot exceed 100 psi 7 bar Connect th...

Page 9: ...c Page 7 CAUTION The air exhaust should be piped to an areafor safe disposition of the product being pumped in the event of adiaphragm failure TYPICAL INSTALLATION GUIDE For Non Metallic Pumps Air Inl...

Page 10: ...enings and connections Be certain the air supply is locked out or made non operational so that it cannot be started while work is being done on the pump Be certain that approved eye protection and pro...

Page 11: ...coded YELLOW 364 E P D M Rubber Color coded BLUE 365 Neoprene Rubber Color coded GREEN 366 Food Grade Nitrile 368 Food Grade EPDM 370 Butyl Rubber Color coded BROWN 371 Philthane Tuftane 374 Carboxyl...

Page 12: ...er Corrective Action Remove muffler screen clean or de ice and reinstall Refer to the Air Exhaust section of your pump SERVICE MANUAL What to Check Pumped fluid in air exhaust muffler Corrective Actio...

Page 13: ...m20nmdl3sm rev0814 Model M20 Non Metallic Page 11...

Page 14: ...Gaskets Retaining Rings Air Valve Sleeve Spool Set and Pilot Valve Assembly 476 257 354 WETTED END KIT Santoprene Diaphragms Santoprene Balls and TFE Seals 476 257 360 WETTED END KIT Nitrile Diaphrag...

Page 15: ...000 Air Valve Assembly 1 031 140 001 Air Valve Assembly 031 140 002 Air Valve Assembly w PTFE coated Hardware 1 031 141 000 Air Valve Assembly No Integral Muffler 1 031 141 001 Air Valve Assembly No I...

Page 16: ...revention 2 196 189 552 Chamber Spill Prevention 2 46 286 120 600 Diaphragm Pumping 2 47 518 200 520 Manifold 2 replaces 518 199 520 518 200 520E Manifold 50mm DIN 2 replaces 518 199 520E 518 200 552...

Page 17: ...ugh the exposed ports 4 Install safety clip item 1 N into the smaller unthreaded hole in one end cap item 1 D This locks the valve spool to one side keeping the pump from shifting Apply air pressure t...

Page 18: ...umps with Alternate Mesh Sound Dampening Mufflers or Piped Exhaust 1 031 141 000 Air Valve Assembly 1 Includes all items used on 031 140 000 minus items 1 D 1 F 1 J AIR VALVE ASSEMBLY PARTS LIST Item...

Page 19: ...hes or other contaminates Remove the sleeve if needed and replace both the sleeve and spool with a new sleeve and spool set item 1 A STEP 3 Reassembly of the air valve Install one end cap item 1 E wit...

Page 20: ...96 559 Cap Muffler 1 1 E 165 098 147 Cap End 2 1 F 530 028 550 Muffler 1 1 G 560 020 360 O Ring 8 1 H 675 044 115 Ring Retaining 2 1 J 710 015 115 Screw Self Tapping 4 1 K 210 008 330 Clip Safety 1 1...

Page 21: ...s Remove the sleeve if needed and replace both the sleeve and spool with a new sleeve and spool set item 1 A STEP 3 Reassembly of the air valve Install one bumper item 1 C and one end cap item 1 E wit...

Page 22: ...or protecting switch with short circuit and thermal instantaneous tripping set to rated current shall be connected in series to each solenoid as short circuit protection For very low rated currents of...

Page 23: ...cycle the pump s air distribution valve an electric solenoid is utilized As the solenoid is powered one of the pump s air chambers is pressurized while the other chamber is exhausted When electric po...

Page 24: ...Overlay Torque 480 in lbs Torque 480 in lbs Diaphragm Service Drawing Non Overlay Field conversion kit 475 256 000 available for conversion from PTFE Overlay to One Piece bonded Diaphragm Part Descri...

Page 25: ...sing the capscrews items 11 12 hex nuts and flat washers and tighten Make sure the bumper item 6 is installed over the diaphragm rod Thread the stud of the other diaphragm assembly clockwise into the...

Page 26: ...t valve Generously lubricate outside diameter of the sleeve and o rings Then carefully insert sleeve into valve body Take CAUTION when inserting sleeve not to shear any o rings Install retaining ring...

Page 27: ...source is at a higher level than the pump flooded suction condition pipe the exhaust higher than the product source to prevent siphoning spills See illustration 3 at right CONVERTING THE PUMP FOR PIP...

Page 28: ...s abrasive wear or embedded materials Replace as needed Inspect the check balls items 3 for wear abrasion or cuts on the spherical surface The check valve seats items 38 should be inspected for cuts a...

Page 29: ...ncrements and the suction elbows can be rotated in 180 increments see optional positioning in the Dual Porting Drawing DUAL PORTING OF THE SUCTION AND SINGLE PORTING OF THE PUMP DISCHARGE To convert t...

Page 30: ...0 60Hz Kit 032 045 000 12 32VDC To install electronic leak detectors remove the bottom NPT pipe plug on the visual sight tube item 50 Insert leak detector into the pipe tee item 53 LEAK DETECTION OPTI...

Page 31: ...Stroke Counter Batch Controller or user control devices such as a PLC The Pulse Output Kits mount directly onto the Muffler Cap on theAir Distribution Valve Assembly or onto the air valve and senses...

Page 32: ...e OPTION 1 530 027 000 Sound Dampening Muffler screws directly into the Air Valve body This muffler is equipped with a porous plastic element OPTION 2 530 010 000 Mesh Muffler screws directly into the...

Page 33: ...code for detailed grounding instruction and the type of equipment required Take action to prevent static sparking Fire or explosion can result especially when handling flammable liquids The pump pipi...

Page 34: ...rer Warren Rupp Inc 800 N Main Street P O Box 1568 Mansfield Ohio 44901 1568 USA certifies that Air Operated Double Diaphragm Pump Series M Non Metallic M Metallic and Surge Suppressors comply with th...

Page 35: ...N 60079 25 2011 For pumps equipped with Pulse Output ATEX Option Quality B V 0344 AODD Pumps and Surge Suppressors For Type Examination Designations see page 2 back AODD Air Operated Double Diaphragm...

Page 36: ...09ATEX0073 No Yes Yes KEMA 09ATEX0073 CE Pump types M05 M1F M15 M20 and M30 provided with the integral solenoid option II 2 G EEx m c II T5 II 3 2 G EEx m c II T5 II 2 D c IP65 T100o C KEMA 09ATEX007...

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