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Makita MAC2400 - User Manual

Makita MAC2400
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OWNERS MANUAL FOR
Oil Lubricated Air Compressor
MODEL No
MAC2400
SPECIFICATION CHART
Model # MAC2400
Horsepower 2.5
SCFM @ 40 PSIG 4.8
SCFM @ 90 PSIG 4.2
Cut-In Pressure 100 PSI
Cut-Out Pressure 130 PSI
Bore 51 mm
Stroke 44 mm
Voltage -Single Phase 120
Motor RPM 1720
Amperage @ max pressure 12.3
Tank Size 4.2 Gallon
CSA/US Listed Yes
Minimum Circuit Requirement: 15 AMPS
*A circuit breaker is preferred. Use only a fuse or circuit
breaker that is the same rating as the branch circuit the air
compressor is operated on. If the air compressor is connected
to a circuit protected by fuses, use time delay fuses.
IMPORTANT — Read the Safety Guidelines and ALL
instructions carefully before operating.
www.makitatools.com

Table of Contents

Questions and Answers

  • L
    Larry Cisneros MDAug 12, 2025
    How to fix excessive tank pressure on my Makita MAC2400 Air Compressor when the safety valve pops off?
    • M
      Mr. Robert JordanAug 12, 2025
      If the safety valve on your Makita Air Compressor pops off due to excessive tank pressure: * First, move the pressure switch lever to the "OFF" position. If the compressor doesn't stop, unplug it. If the electrical contacts are fused, the pressure switch needs replacement. * If the contacts are in good condition, check if the pin in the pressure release valve is stuck. Replace the valve if the pin's movement is restricted. * As a final step, adjust or replace the pressure switch.
  • D
    Dr. Shawn BrownAug 16, 2025
    What to do if the motor of my Makita MAC2400 will not run?
    • S
      shane62Aug 16, 2025
      If your Makita Air Compressor motor won't run, it could be due to a tripped motor overload protection switch. Allow the motor to cool down, then reset the overload switch. The motor should automatically restart once the tank pressure falls below the pressure switch's cut-in point.
  • B
    Benjamin GutierrezAug 19, 2025
    What causes air leak from the safety valve on my Makita Air Compressor?
    • W
      William BuckAug 19, 2025
      If you have an air leak from the safety valve on your Makita Air Compressor, it may be a defective safety valve. Try manually operating the safety valve by pulling on its ring. If the valve continues to leak after this, it should be replaced.
  • T
    Thomas FrostAug 23, 2025
    What to do if there are air leaks at or inside the check valve of my Makita Air Compressor?
    • J
      Jerry SmithAug 23, 2025
      If you're experiencing air leaks at or inside the check valve of your Makita Air Compressor, it could be due to a defective or dirty check valve. A defective check valve can cause a continuous air leak at the pressure release valve when the compressor is off and the tank is pressurized. Remove the check valve and either clean it, or replace it if necessary. Remember not to overtighten it upon reinstallation.
  • C
    collin95Aug 27, 2025
    Why is my Makita MAC2400 Air Compressor not supplying enough air to operate accessories?
    • L
      Lisa MartinAug 27, 2025
      If the Makita Air Compressor isn't supplying enough air, consider these points: * Reduce air usage. * Ensure your compressor meets the accessory's SCFM or pressure needs, or acquire a larger compressor. * Maintain a clean air intake filter, replacing it when needed, and avoid operating the compressor in paint spray areas. * Verify the unit is properly plugged into a functioning electrical outlet. * Inspect and replace any damaged hoses. * Clean or replace any restricted check valves. * Tighten any loose fittings to prevent air leaks.
  • T
    Tami DavisAug 30, 2025
    Why does the pressure drop on my Makita MAC2400 Air Compressor when I use an accessory?
    • B
      Brittney SmithAug 31, 2025
      If the pressure reading on the regulated pressure gauge of your Makita Air Compressor drops when an accessory is in use, it's normal for some pressure drop to occur. However, if the pressure drop is excessive, adjust the regulator following the provided instructions. Make sure to adjust the regulated pressure while the accessory is being used to simulate flow conditions.
  • N
    Nicole Wells MDSep 3, 2025
    What else could cause my Makita MAC2400 Air Compressor motor to not run?
    • W
      whitecharlesSep 3, 2025
      If your Makita Air Compressor motor won't run, even after addressing the overload switch, consider these possibilities: * A stuck-open check valve: Remove, clean, or replace it. * Loose electrical connections: Inspect wiring inside the pressure switch and terminal box. * A defective capacitor or motor: Have it inspected/replaced at an authorized service center. Avoid operating the compressor where there is paint spray. * Blown fuse/tripped breaker: Replace the fuse or reset the breaker, ensuring correct ratings. Check for low voltage or improper extension cords. Try the compressor on its own circuit. * A pressure unloader valve not unloading head pressure: Bleed the line by turning the pressure switch to "off"; replace the valve if it doesn't open.
  • A
    Alexis Gonzalez DDSSep 7, 2025
    What to do if there are air leaks in the air tank of my Makita MAC2400?
    • J
      Jeffrey GardnerSep 8, 2025
      If you discover air leaks in the air tank or at the air tank welds of your Makita Air Compressor, the air tank is defective and must be replaced. Do not attempt to repair the leak, and never drill into, weld, or modify the air tank, as this will weaken it and create a risk of rupture or explosion.

Summary

Safety Warnings and Precautions

Risk of Unsafe Operation

Details hazards associated with improper operation and prevention methods.

Risk of Tank and Accessory Bursting

Covers dangers of tank explosion and accessory over-pressure.

Electrical, Fire, and Health Hazards

Explains risks of shock, fire, explosion, and breathing issues.

Mechanical and Burn Hazards

Highlights risks from moving parts and hot components.

Product Information and Storage

Glossary of Terms

Defines key technical terms related to air compressor operation.

General Information

Provides an overview of the air compressor's capabilities and uses.

On-Receipt Inspection

Guides users on checking the compressor for damage upon arrival.

Storage Recommendations

Offers guidance on proper storage procedures for the air compressor.

Setup and Operation

Description of Components and Operation

Explains the function of key parts like the drain valve, switches, pump, and valves.

Installation and Break-in Procedures

Covers proper placement, lubrication, oiling, and initial operational steps.

Operating Procedures and Checklist

Details the daily start-up checklist and end-of-use procedures.

Maintenance and Troubleshooting

Routine Maintenance Schedule

Outlines regular checks, oil changes, and cold weather oil viscosity.

Service and Repair Instructions

Provides guidance on air filter replacement, safety valve checks, and check valve repair.

Troubleshooting Common Issues

Lists problems, causes, and solutions for operational difficulties.

Support and Warranty Information

Factory Service Center Locations

Lists addresses and contact details for authorized repair facilities.

Makita One Year Limited Warranty

Explains the warranty terms, coverage, and limitations.

Makita MAC2400 Specifications

General IconGeneral
Horsepower2.5 HP
Tank Capacity4.2 gallons
Maximum Pressure130 PSI
CFM at 90 PSI4.2 CFM
Pump TypeOil-lubricated
Noise Level79 dB
Weight77 lbs
TypePortable
Power SourceElectric
Voltage120V
Amperage12.3 Amps
SCFM @ 40 PSI4.8 SCFM

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