This brake caliper repair kit contains the seals, pistons, and hardware needed to restore clamping force in the host tractor's braking system. It replaces the internal wear components that degrade over time due to heat cycling and contamination. A leaking or seized caliper reduces braking efficiency and can cause uneven pad wear. The kit is manufactured by Autofren Seinsa to match the original piston bore dimensions and seal groove geometry, so the caliper body does not require machining. On reassembly, clean the bore thoroughly and lubricate the seals with brake assembly fluid before installation.