MEC 2000/PMEC 3000/PMEC 4000/POwner’s RecordDate of Purchase: ____________________________Purchased from: _____________________________Model: ________
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11The MEC Series PumpsModel-Specific Informationfor theMEC 2000/PMEC 3000/PMEC 4000/PMEC Series Pump SpecificationsModel Number 2000 3000 4000RPM Rang
12PerformancePRESSURE PSIMEC 2000/P PERFORMANCEVACUUM – INCHES OF MERCURYRPM140012001000HPCFMHPCFMH.PCFM2511709578442097386164815876666551106805684555
13System requirementsHigh quality components• The pump body and rotor are constructed of cast ironwith free sliding vanes made of special nonmetallic,
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15Operating InstructionsMEC 2000/PMEC 3000/PMEC 4000/PInstallation• Check pump rotation. See Determining the Rotationof Pump.• Pump should always be m
16Lubrication procedure for all vacuum pumps on start up(This procedure must be followed prior to the operation of a newvacuum pump.):• With force fee
17Adjusting the automatic oil pumpThe automatic oil pump is a metered piston-type pump. If you wish to adjust the pump, please follow these instructio
18Testing flow rate after adjustment1. Observe oil drip rate in oil view meter or oil line toensure adequate lubrication.2. Adjustments should be done
19Maintenance• With force feed type, the lubrication rate isadjustable at dripper and should be checked on aregular basis. Oil should be supplied to p
© 1998 National Vacuum Equipment, Inc.No part of this manual may be reproduced without the writtenpermission of National Vacuum Equipment, Inc.1098
20• It is good practice to clean your pump on a regularbasis as this will normally increase the life of yourpump greatly.• Vane wear should be checked
21TroubleshootingMEC 2000/PMEC 3000/PMEC 4000/PPump overheats• No oil in pump• Oil adjustment set too lean• Rpm too fast• Prolonged operationToo much
22No vacuum or pressure in tank• Suction valve in neutral• Defective seal or vanes• Pump not driven fast enough• Check valve or suction line clogged•
23Pump RebuildingMEC 2000/PMEC 3000/PMEC 4000/PVane checking1. MEC pumps are equipped with avane checking port.2. Remove the Allen head plug in anendp
243. Remove the 3 6x20mm screwsattaching the oil pump assembly to thevacuum pump.4. Remove the oil pump drive keyfrom the end of the rotor.5. Remove t
256. Note the number of gaskets on theendplate. You must use the same numberof gaskets during reassembly.7. Inspect vanes, bearings and seals and repl
269. Coat the housing and vanes withoil and install the vanes in the rotor.The vanes should slide freely in thevane slot.10. Locate the replacement se
2713. Lubricate seal sleeve and installthe endplate on the end of the rotor andcarefully drive the endplate on the rotor.14. When the endplate is clos
2816. At this point you should be able toturn the pump by hand.17. Reinstall the oil pump drive keyand oil pump mount assembly to thepump.Be sure to l
29Complete rebuild1. Follow steps 1-7 in the vane replacementinstructions.2. Place a cushion under the rotor toprevent damage when the front endplatei
ContentsIntroductionAbout National Vacuum Equipment, Inc. . . . . . . . 5Limited WarrantyWarranty . . . . . . . . . . . . . . . . . . . . . . . . . .
305. Count the number of gaskets.6. Clean the rotor, rotor slots and housing and inspectfor wear or damage.If the housing needs to be bored or honed,
318. Locate the replacement seals andinstall them in the endplates with theseals positioned back to back.Replace the seal in the bearing coverwith the
3213. Slide rotor-endplate assembly into the pumphousing.Slide the cushion material used during disassemblyunder the rotor on the opposite end to gain
33Tighten the bolts sufficiently tomake contact between the endplate andthe housing.15. Coat vanes with oil and install thevanes in the rotor. The van
34Tighten endplate bolts to the pointwhere the endplate just touches thehousing.19. With a prybar and a block of wood,lift the endplate to make certai
35Parts List – MEC /P Series PumpsMEC 2000/PMEC 3000/PMEC 4000/PSee Parts Diagram on the next page.Part # DescriptionM1 Housing - 2000ME1 Housing - 30
36Parts DiagramMEC 2000/PMEC 3000/PMEC 4000/PParts list continued from previous page.M4M18M3M19M20M12M53M49M13M48M50M34M16M17Part # DescriptionM34 Bol
37National Vacuum Equipment, Inc.
38Part # DescriptionM2 Gear CasingM4 GasketM5/M Rotor - 2000/540ME5/M Rotor - 3000/540MEC5/M Rotor - 4000/540M6 KeyM7 Vane - 2000ME7 Vane - 3000MEC7 V
39MEC 2000 - 3000 - 4000Mixer Valve ManifoldMEC 2000 – MEC 3000 – MEC 4000Mixer Valve ManifoldParts DiagramPart # DescriptionM8 FittingM10 DipstickM11
4Parts List - MEC /P Series PumpsParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Parts Diagram . . . . . . . . . . . . . .
40Automatic Lubrication SystemMEC 2000MEC 3000MEC 4000See Parts Diagram opposite.Part # DescriptionLA1 Bearing CoverLA11 Hose (4mm x 6mm x 9.5")L
41LA11DetailAutomatic Lubrication SystemMEC 2000 - 3000 - 4000R37M49LW32CDLW32CSM13LF8LA1R31R37R3R36R34R33R15R46LA13
42Automatic Oil PumpSee Parts Diagram opposite.Part # DescriptionP 1CW Pump Body – 1 outlet (Clockwise)P 1CCW Pump Body – 1 outlet (Counterclockwise)P
43DetailAutomatic Oil PumpTwo Outlet TypePart # LW32D ClockwisePart # LW32S CounterclockwiseDetailAutomatic Oil PumpOne Outlet TypePart # LW32CD Clock
Gear-Type Lubrication SystemMEC 2000/PMEC 3000/PMEC 4000/PSee Parts Diagram opposite.Part # DescriptionLF1 Cover PlateLF2 Cover Plate GasketLF3 Drive
45DetailGear-Type Lubrication SystemMEC 2000/P • MEC 3000/P • MEC 4000/PLF12LF15LF13LF19LF17LF20LF17LF3LF4LF7LF8M13LF2LF1LF6LF17
IndexHHose 15Housing 25, 29, 35Housing bore 31Housing, boring or honing 30Hydraulic press 29IIdentifying mark 29Installation 15Instructions, re
System requirements 13TTank 22Threaded rod 31Torque 27, 33Troubleshooting 21Turbine oil 18VVacuum, continuous 11Vacuum, intermittent 11Vacuum,
5IntroductionGeneral InformationAbout National Vacuum Equipment, Inc.Congratulations! You now own a quality vacuum/pressurepump exclusively distribute
6OUR HISTORY:National Vacuum Equipment, Inc. was founded in 1980 byBruce Luoma. The Company started as a retailer of vacuumpumps. Soon after it starte
7Be sure to line up the oil pump drive key and the oilpump shaft prior to tightening the assembly to thepump.23. Connect the oil lines to the oil pump
8pumps received for warranty consideration mustretain the original NVE serial number tag.2. The one (1) year period shall begin the day theproduct is
99. Manufacturer’s liability as stated herein cannot bealtered except in writing signed by an officer ofNational Vacuum Equipment, Inc.10. Certain pro
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