1. Manuals
  2. Brands
  3. MMD Equipment Manuals
  4. Air Compressor
  5. MMD 70
  6. Operator, maintenance and parts manual

MMD Equipment MMD 70 Operator, Maintenance And Parts Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

OPERATOR'S, MAINTENANCE
AND PARTS MANUAL

AIR COMPRESSOR

MMD 70
MMD Equipment Inc.
121 High Hill Road
Swedesboro, NJ 08085
Tel: (800) 433-1382
Fax: (856) 467-5235
www.mmdequipment.com

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the MMD 70 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for MMD Equipment MMD 70

Summary of Contents for MMD Equipment MMD 70

  • Page 1: Air Compressor

    OPERATOR’S, MAINTENANCE AND PARTS MANUAL AIR COMPRESSOR MMD 70 MMD Equipment Inc. 121 High Hill Road Swedesboro, NJ 08085 Tel: (800) 433-1382 Fax: (856) 467-5235 www.mmdequipment.com...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Operation & Maintenance Section Page Specifications ... Safety ... 3-15 Description of Components ... 16-21 Compressor Operation ... 22-26 Compressor Inspection, Lubrication, And Maintenance ... 27-37 Troubleshooting ... 38-41 Recommended Spare Parts List ... Warranty Section Warranty Information/Claims ... 43-48 Parts &...

  • Page 3: Specifications

    ENGINE SPECIFICATIONS COMPRESSOR SPECIFICATIONS HONDA 4-CYCLE, V-TWIN MODEL AC70 TYPE OHV AIR COOLED GASOLINE TYPE OIL FLOODED ROTARY SCREW MODEL GX620K1-BOSS DELIVERY (CFM) 70 CFM @ 100 PSIG (1.98m3/min) POWER @3600RPM - 20 HP (15kw) HP (kw) OPERATING PRESSURE RANGE 80-115 PSIG DISPLACEMENT - cu.

  • Page 4: Safety

    SAFETY WARNING ALL UNITS ARE SHIPPED WITH A DETAILED OPERATOR’S, INSTALLATION AND PARTS MANUAL. THIS MANUAL CONTAINS VITAL INFORMATION FOR SAFE AND EFFICIENT OPERATION OF THIS UNIT. CAREFULLY READ THE OPERATORS MANUAL BEFORE STARTING THE UNIT. FAILURE TO READ AND COMPREHEND THE INSTRUCTIONS COULD RESULT IN SERIOUS BODILY INJURY OR PROPERTY DAM- AGE.
  • Page 5 SAFETY PARKING OR LOCATING COMPRESSOR Locate compressor on level areas, if possible. If not, locate compressor across grade, so the compressor does not tend to roll down hill. Do not locate compressor on grades exceeding 15 degrees (27%). Make sure compressor is parked or located on a firm surface that can support its weight. Locate compressor so the wind, if any, tends to carry the engine exhaust fumes and radiator heat away from the compressor air inlet openings and also where the compressor will not be exposed to excessive dust from the work site.
  • Page 6 SAFETY PRESSURE RELEASE (CONT.) Secure all hose connections by wire, chain or other suitable retaining devices to prevent tools or hose ends from being accidentally disconnected and expelled. Open compressor oil filler cap only when compressor is not running and is not pressurized. Shut down the compressor and bleed the sump (open service valve) pressure to zero before removing the oil filler cap.
  • Page 7 SAFETY FIRE AND EXPLOSION (CONT.) Disconnect the ground (negative) battery connection prior to attempting any repairs or clean- ing inside the enclosure. Tag the battery connection so others will not unexpectedly recon- nect it. Keep electrical wiring, including the battery terminals and other terminals, in good condi- tion.
  • Page 8 SAFETY FIRE AND EXPLOSION (CONT.) Antifreeze compound used in air line anti-ice systems contains methanol, which is flammable. Use systems and refill with compound only in well-ventilated areas away from heat, open flames, or sparks. Do not expose any part of these systems or the antifreeze compound to temperatures above 150 degrees F (65 degrees C).
  • Page 9 SAFETY HOT SURFACES, SHARP EDGES AND SHARP CORNERS, INTAKE VACUUM Avoid bodily contact with hot oil, hot coolant, hot surfaces and sharp edges and corners. Keep all parts of the body away from all points of air discharge and away from hot exhaust gases.
  • Page 10 SAFETY TOXIC AND IRRITATING SUBSTANCES (CONT.) Fuels, oils, coolants, lubricants and battery electrolyte used in this compressor are typical of the industry. Care should be taken to avoid accidental ingestion and/or skin or eye contact. In the event of indigestion, seek medical treatment promptly. Do not induce vomiting if fuel is ingested.
  • Page 11 SAFETY LIFTING This compressor is provided with a lifting bail for routine lifting, loading onto trucks, etc. Compressors to be air lifted by helicopter must not be supported by the lifting bail, but instead by slings with appropriate spreader bars. In any event, lift only in full compliance with OSHA standards 29 CFR 1910 subpart N.
  • Page 12 SAFETY JUMP STARTING Observe all safety precautions mentioned elsewhere in this manual. Batteries may contain and/or generate gases that are flammable and explosive. Keep flames, sparks and other sources of ignition away. Batteries contain acid that is corrosive. Do not allow battery acid to contact eyes, fabrics, or painted surfaces, as serious personal injury or property damage may result.
  • Page 13 SAFETY JUMP STARTING (CONT.) Use only jumper cables that are clean, in good condition, and are heavy enough to handle the starting current. Avoid accidental contact between jumper cable terminal clips or clamps and each other or any metallic portion of either the compressor or the starting vehicle to minimize the possibil- ity of uncontrolled arcing, which might serve as a source of ignition.
  • Page 14 SAFETY NOTE THE OWNER, LESSOR, OR OPERATOR OF THE COMPRESSOR IS HEREBY NOTI- FIED AND FOREWARNED THAT ANY FAILURE TO OBSERVE THESE SAFETY PRE- CAUTIONS MAY RESULT IN DAMAGE OR INJURY. MMD EXPRESSLY DISCLAIMS RESPONSIBILITY OR LIABILITY FOR ANY INJURY OR DAMAGE CAUSED BY FAILURE TO OBSERVE THESE SPECIFIED PRECAU- TIONS OR BY FAILURE TO EXERCISE THAT ORDINARY CAUTION AND DUE CARE, REQUIRED WHEN OPERATING OR HANDLING THE COMPRESSOR IS TAKEN,...
  • Page 15 SAFETY P/N 300040 P/N 300042 P/N 300968 P/N 104-90032 P/N 104-90034...

  • Page 16: Safety

    SAFETY P/N 300516 P/N 104-90027 P/N 305107 P/N 305121 P/N 305106...

  • Page 17: Description Of Components

    DESCRIPTION OF COMPONENTS POWER UNIT The power unit used to drive the compressor is a gasoline engine that has been carefully selected for its ability to provide an efficient and reliable source of power. For detailed information on the power unit, refer to the Engine Operator’s Manual provided separately. COMPRESSOR ASSEMBLY The AC70 compressor assembly is a positive displacement, oil flooded, rotary screw type unit employing one stage of compression to achieve the desired pressure.
  • Page 18 DESCRIPTION OF COMPONENTS OIL SUMP Compressed, oil-laden air enters the sump from the compressor. Most of the oil is separated from the air as it passes through a series of baffles and defusing plates. The oil accumulates at the bottom of the sump for re-circulation. Some small droplets of oil remain suspended in the air and are passed on to the coalescer.
  • Page 19 DESCRIPTION OF COMPONENTS COMPRESSOR COOLING SYSTEM The compressor cooling system consists of an oil cooler, electric fan and motor. See Cooler and Parts System in the illustration section. An automated thermostatic control system maintains a continuous temperature check of the lubricant.
  • Page 20 DESCRIPTION OF COMPONENTS Note:- or high discharge air If the compressor shutsdown on high discharge air pressure temperature, find and fix the problem before restarting. CONTROL SYSTEM The prime components of the compressor control system include the compressor inlet valve and an air cylinder.
  • Page 21 DESCRIPTION OF COMPONENTS INLET VALVE The compressor inlet valve is a piston operated disc valve that has a dual function of regulat- ing the inlet opening to control capacity and serving as a check valve at shutdown. DISCHARGE PRESSURE REGULATOR VALVE This valve is used to select the desired discharge pressure within the operating pressure range.
  • Page 22 DESCRIPTION OF COMPONENTS ELECTRICAL AND PROTECTIVE CIRCUIT SYSTEM The compressor electrical system is a 12-volt negative ground type. It is equipped with a protective circuit to minimize damage which could be caused by high compressor discharge temperature, or high discharge pressure. See wiring diagram and electrical system in the illustrations section.

  • Page 23: Compressor Operation

    COMPRESSOR OPERATION GENERAL Every AC70 compressor has been operated and tested at the factory before shipment. This testing assures that the unit is operating properly and that the compressor will deliver its rated capacity. Regardless of the care taken at the factory, there still exists a possibility that damage may occur during shipment.
  • Page 24 COMPRESSOR OPERATION NORMAL STARTING - GASOLINE ENGINE 1. Inspect the compressor, engine, and other assemblies for loose connections or damage that might have occurred since the last operation. 2. Check engine oil and fluid levels. 3. Check compressor oil sump level. 4.
  • Page 25 COMPRESSOR OPERATION HOT WEATHER OPERATION Keep the engine filled with clean oil and check the oil level more frequently than usual. Keep the outside of the compressor oil cooler clean. Locate the unit in a well-ventilated area. When operating in humid conditions, it is recommended that the compressor oil change interval be shortened.
  • Page 26 COMPRESSOR OPERATION While MMD EQUIPMENT has built into its compressor several controls and indicators to assure you that it is running properly, you will want to recognize and interpret the readings which will call for service or indicate the beginning of a malfunction. Before starting the compressor, read this section thoroughly.

  • Page 27: Compressor Operation

    COMPRESSOR OPERATION OPERATING CONDITIONS The following conditions should exist for maximum performance of the compressor. The compressor should be as close to level as possible when operating. The compressor will operate on a 15-degree sideward, lengthwise tilt without any adverse problems. Fluid carryover and oil starvation may occur if operated beyond this tilt.

  • Page 28: Compressor Inspection, Lubrication And Maintenance

    COMPRESSOR INSPECTION, LUBRICATION AND MAINTENANCE This section contains instructions for performing the inspection, lubrication and maintenance procedures required in maintaining the compressor in proper operating condition. The importance of performing the maintenance described herein cannot be over emphasized. Periodic maintenance procedures to be performed on the equipment covered by this manual are listed below.

  • Page 29: Maintenance Chart

    COMPRESSOR INSPECTION, LUBRICATION, AND MAINTENANCE CHART INTERVAL ACTION 1. Check compressor's oil level. 2. Check air filter. EVERY 10 HOURS OR 3. Check for oil and air leaks. DAILY 4. Check fuel supply after running. 5. Check for fuel, oil and compressor fluid leaks. 1.
  • Page 30 COMPRESSOR INSPECTION, LUBRICATION, AND MAINTENANCE NOTE OBSERVE ALL GAUGE READINGS. NOTE ANY CHANGE FROM THE NOR- MAL READING AND DETERMINE THE CAUSE. HAVE NECESSARY REPAIRS MADE. “NORMAL” IS THE USUAL GAUGE READING WHEN OPERATING AT SIMILAR CONDITIONS ON A DAY-TO-DAY OPERATION. FIRST COMPRESSOR OIL AND OIL FILTER ELEMENT CHANGE SHOULD BE MADE AT 50 HOURS.
  • Page 31 LUBRICATION LUBRICANT RECOMMENDATIONS WARNING IT IS IMPORTANT THAT THE COMPRESSOR FLUID BE OF A RECOM- MENDED TYPE AND THAT THIS OIL, AS WELL AS THE AIR FILTER, OIL FILTER AND SEPARATOR ELEMENTS BE INSPECTED AND REPLACED AS STATED IN THIS MANUAL.
  • Page 32 LUBRICATION APPLICATION GUIDE Not all lubricating oils are suitable for rotary screw compressor use. The most satisfactory oils are the non-detergent types that contain high levels of corrosion, oxidation, and foam inhibitors. Your AC70 compressor is factory filled with Dextron III ATF. Other non-detergent motor oils, SAE 10W, class SE or CD, and SAE 30 that meet the requipments below can be used.
  • Page 33 LUBRICATION NOTE UNKNOWN INFLUENCES OF ENVIRONMENTAL FACTORS SUCH AS THE INTAKE OF REACTIVE GASES OR VAPORS IN THE AIR MAY LEAD TO CHEMICAL CHANGES IN ANY OIL. THIS MAY CAUSE PREMATURE FAILURE OF THE LUBRICANT AND THE USEFUL LIFE OF ALL “EXTENDED LIFE” LUBRI- CANTS MAY BE SHORTER THAN QUOTED BY THE LUBRICANT SUPPLIER.
  • Page 34 MAINTENANCE COMPRESSOR OIL SUMP FILL, LEVEL, AND DRAIN Before adding or changing compressor oil make sure that the sump is completely relieved of pressure. Oil is added at the fill cap on the side of the compressor. A drain plug is provided at the bottom of the sump.
  • Page 35 6. Run system and check for leaks. WARNING DO NOT SUBSTITUTE ELEMENT. USE ONLY A GENUINE MMD EQUIPMENT RE- PLACEMENT ELEMENT. THIS ELEMENT IS RATED AT 200 PSI WORKING PRES- SURE. USE OF ANY OTHER ELEMENT MAY BE HAZARDOUS AND COULD IMPAIR THE PERFORMANCE AND RELIABILITY OF THE COMPRESSOR, POSSIBLY VOID- ING THE WARRANTY.
  • Page 36 7. Check for leaks in operation. WARNING DO NOT SUBSTITUTE ELEMENT. USE ONLY A GENUINE MMD EQUIPMENT RE- PLACEMENT ELEMENT. THIS ELEMENT IS RATED AT 200 PSI WORKING PRES- SURE. USE OF ANY OTHER ELEMENT MAY BE HAZARDOUS AND COULD IMPAIR THE PERFORMANCE AND RELIABILITY OF THE COMPRESSOR, POSSIBLY VOID- ING THE WARRANTY.
  • Page 37 MAINTENANCE NOTE PARTS REQUIRED FOR ENGINE MAINTENANCE MAY BE FOUND IN THE ENGINE PARTS MANUAL, A COPY OF WHICH IS PROVIDED WITH EACH UNIT. FULL LOAD SPEED Using an air flow silencer, open service air valve until 100 PSI is being held on receiver pressure gauge.
  • Page 38 COMPRESSOR INSPECTION, LUBRICATION, AND MAIN- TENANCE CHART INTERVAL ACTION 1. Check compressors oil level. 2. Check air filter. EVERY 10 HOURS OR 3. Check for oil and air leaks. DAILY 4. Check fuel supply after running. 5. Check for fuel, oil and compressor fluid leaks. 1.

  • Page 39: Troubleshooting

    TROUBLESHOOTING This section contains instructions for troubleshooting the equipment following a malfunc- tion. The troubleshooting procedures to be performed on the equipment are listed below. Each symptom of trouble for a component or system is followed by a list of probable causes of the trouble and suggested procedures to be followed to eliminate the cause.
  • Page 40 TROUBLESHOOTING UNPLANNED SHUTDOWN When the operation of the machine has been interrupted by an unexplained shutdown, check the following: 1. Check to determine if compressor oil is at proper level. 2. Check the engine oil level with the engine stopped and in a level position. If the oil level is low, remove the oil filler cap, and fill to the upper limit mark on the dipstick with the rec- ommended oil.
  • Page 41 TROUBLESHOOTING BLOW DOWN VALVE If after the compressor is shutdown, pressure does not automatically blow down, check for: 1. Automatic blow down valve may be inoperative. 2. Blockage in air line from compressor to blow down valve at coalescer head. 3.
  • Page 42 TROUBLESHOOTING HIGH COMPRESSOR DISCHARGE TEMPERATURE 1. Check compressor oil level. Add oil if required (see section for oil specifications). 2. Check electric fan and switch. 3. Clean outside of oil cooler. 4. Clean oil system (cooler) internally. 5. Plugged compressor oil filter. Change element. 6.

  • Page 43: Recommended Spare Parts List

    RECOMMENDED SPARE PARTS LIST ENGINE MAINTENANCE PARTS DESCRIPTION MMD P/N Engine Oil Filter 304968 Engine Fuel Filter 304969 Engine Air Cleaner Element 304967 Spark Plugs 304971 Spare Keys 305404 COMPRESSOR MAINTENANCE PARTS DESCRIPTION MMD P/N Drive Belts (Need two) 300742-530 Compressor Air Cleaner Element 302091 Compressor Oil Filter...
  • Page 44 WARRANTY CLAIMS...
  • Page 45 WARRANTY MMD Equipment (MMD) warrants that this Rotary Screw Compressor unit conforms to applicable drawings and specifications. The compressor assembly will be free from defects in material and workmanship for a period of two (2) years from the date of initial operation or thirty (30) months from the date of shipment, whichever period first expires.

  • Page 46: Summary Of Main Warranty Provisions

    SUMMARY OF MAIN WARRANTY PROVISIONS As claims, policies and procedure are governed by the terms of MMD Equipment’s warranty, it is necessary to outline some of the more important provisions. The MMD Equipment warranty applies only to new and unused products which, after shipment from the factory, have not been altered, changed, repaired or mistreated in any manner whatsoever.
  • Page 47 4. Claim acceptance or denial will result in release of a credit or confirmation letter of denial. 5. MMD Equipment will consider each claim on its own merit and reserves the right to accept or reject claim request. In case of air-ends, these will be returned to the original manufacturer for their analysis/ input.

  • Page 48: Preparation Of Part Return

    WARRANTY CLAIMS PREPARATION OF PART RETURN Parts returned to MMD Equipment must be properly packaged to prevent damage during shipment. Dam- age to a part as a result of improper handling or packing could be cause for claim’s rejection. When addressing the package for shipment, the following information must be on the outside of, or clearly tagged on the package.
  • Page 49 SCREW COMPRESSOR AIR-END EXCHANGE PROGRAM Replacement air-ends are available from the factory. For current prices and availability, contact MMD Equipment or an authorized dealer. Prices are F.O.B. shipping point. Prices do not include labor for removal or installation.
  • Page 50 PART NUMBER & ILLUSTRATION SECTION...

This manual is also suitable for:

Ac70

Table of Contents