This brake pump repair kit contains the seals, pistons, and springs needed to restore pressure and fluid control in the host tractor's brake system. It sits inside the pump housing, where its components re-establish the seal between the actuation piston and the bore. A worn internal seal causes a soft pedal and reduced braking force, as fluid leaks past the piston rather than building line pressure. The kit from manufacturer Granit is machined to the same internal dimensions as the original assembly, so the replacement components seat correctly in the existing bore without additional machining. On installation, clean the bore thoroughly and lubricate the new seals with brake fluid before assembly.