Makita MAC2400 User Manual

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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

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.

Makita MAC2400 Specifications

General

Horsepower	2.5 HP
Tank Capacity	4.2 gallons
Maximum Pressure	130 PSI
CFM at 90 PSI	4.2 CFM
Pump Type	Oil-lubricated
Noise Level	79 dB
Weight	77 lbs
Type	Portable
Power Source	Electric
Voltage	120V
Amperage	12.3 Amps
SCFM @ 40 PSI	4.8 SCFM

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.

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