Matco Mcmc-4 Master Cylinder

From $155.75 to $162.75
Description Part Number Price Buy
MCMC-4A - .50 inch shorter that the MCMC-4
Subtotal $0.00
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MATCO mfg's MCMC-4 master cylinder uses a REMOTE reservoir. The MCMC-4 can be used in individual or dual brake applications. Buna-n orings are used in this assembly. Mil-H-5606 aircraft hydraulic fluid or compatible fluids are reccomended. DOT5 may be used but not DOT5.1 which contains glycol. DOT3 and DOT4 may not be used and will cause immediate damage to the seals.
Universal - Vertical or horizontal mounting with exterior reservoir.

Tested to a maximum of 1200 psi. Normal operation: 400-600 psi.


  • Adjustable clevis


  • Measures 8.05 +-0.25 inches from end to end.
  • Measures 7.5 +-0.25 inches from mounting hole to mounting hole.
  • A 0.625 inch diameter piston is used.
  • Stroke is approximately 1.388 inches.
  • Displacement is 0.43 cubic inches.
  • The ports on all MATCO mfg master cylinders are 1/8 inch NPT (except the MC-4E).



Equbal K Verified Purchase


May 9, 2022

Exactly the replacement needed and shipping was prompt and arrived within 10 days in Australia. Great service, thank you.

David S Verified Purchase


December 7, 2021

Best performance in overseas delivery I have ever experienced !

A. G
October 18, 2019

I requested delivery by USPS to save money, they did, thank you. the cylinders were a perfect fit, reasonable price. Customer service is awesome.

Steven S
March 21, 2019

I bought to replace the old cleveland master cylinders on my experimental kitfox. They fit perfectly and work great. The price was another determining factor . Glad I bought and will recommend them to any one who asks.

Jerry H
August 6, 2017

I received the correct ,part as advertised

Lewis J
April 30, 2020


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: You state that the MCMC-4A is 0.5" shorter than the MCMC-4. Where is this 0.5 taken from, the cylinder or the stroke?

The body of the master cylinders are the same, the stroke for the MCMC-4A is 0.5" shorter than the MCMC-4 unit.

Q: Can the mcmc-4 be mounted with either end up?

They will function fine with once bled with the shaft up or down. It is preferred to have the shaft end higher since the natural flow of any air in the hydraulic system would flow from the outlet port (the lug end) to the inlet port (the shaft end) easily.

Q: What is the difference between the Matco MC-4 and MCMC-4 master cylinder? Could the extra MC be a typo?

"MC-4" is a typo, the correct model number is "MCMC-4."

Q: Can the MC4 master cylinder be used in series with an MC 5 master cylinder in a dual braking system?

Yes. That is correct.

Q: I have an RV12 and have a leak on right side brake. Are these interchangeable between left and right wheels? Thanks

These can be mounted on the left or right.

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