Brake master cylinder 4286326M1 AGCO, aftermarket

Brake master cylinder 4286326M1 is an aftermarket part for the Massey Ferguson and Valtra tractors (AGCO).

Cylinders differ in piston diameter, the position and thread of the ports, the feed arrangement (separate reservoir or one on the body) and push rod length. On cylinders that look alike, even a small difference in piston diameter changes pedal travel and braking force. The cylinder is therefore chosen by part number and compared with the old one. The type of fluid in the system (brake fluid or mineral oil) matters too, as the wrong fluid swells the seals and soon ruins the cylinder. The pedal latch and the pedal return springs are checked too, as a sticking pedal will stop a new cylinder from returning fully as well.

Specifications

Compatibility

According to the product card, 4286326M1 is a brake master cylinder. Fit is confirmed by the part number. Other parts are in Brake cylinders.

Fitting

Before removing the cylinder, park the machine on level ground and chock the wheels. Catch the fluid in a container when disconnecting the lines and protect the ports from dirt. After fitting the new cylinder, set the pedal free play, bleed the system and test the brakes at low speed before work.