⁣Bushing Installation Tool: https://www.cheeft.com/tr/prod....ucts/meritor/meritor


⁣For More Products: https://www.cheeft.com/tr


⁣In this detailed training video, we demonstrate the professional overhaul and complete assembly process for the BPW TSB 4309-228 brake caliper, step-by-step. From disassembly, cleaning, and parts quality control to reassembly and final testing, every phase is explained to serve as a comprehensive resource for service centers and maintenance teams.

Discover the most critical "key points" in this video that impact the long-term performance of this caliper model.


⁣Key Topics and Critical Points Highlighted in the Video:
Parts Quality Control:

Lever & Bridge: Must be forging, not cast.

⁣Roller Bearing: Hardness must be over 45-50 Rockwell.

⁣Bushings: Must be bronze material, not brass.

⁣Rubber Boots: Must have heating protection to prevent melting and water ingress.


⁣Critical Assembly Steps:


⁣!!! THE MOST IMPORTANT STEP (Mechanism): After placing the mechanism in the housing, DO NOT LIFT IT UP. Lifting it will displace the roller bearing, causing the caliper to fail within 1-3 months.

⁣Roller Bearing Positioning: The bearing must be pressed into the lever perfectly flat and centered (using a hammer and screwdriver to align if needed).

⁣Lever Position: Ensure the lever's "nail" is correctly seated in its hole; incorrect positioning will cause the caliper to never work properly.


⁣Bolt Security (Loctite):


⁣Blue glue (Loctite) must be used on all bolts (especially mechanism and guide pins).

⁣Bolts loosening from vibration can cause the carrier to stick, misalign the brake chamber, and lead to catastrophic damage.



⁣Tightening Sequence: Always use a cross pattern when tightening the mechanism bolts.



⁣Testing and Adjustments:


⁣Mechanism Turn Count: Must be 3.25 (three and a quarter) turns, matching the original.

⁣Lever Test: The lever must not stick when released slowly (sticking causes heating).

⁣Final Adjustment: A 45-degree flexibility gap must be left in the adjuster at the end.

⁣Brake Chamber Warning: If the brake chamber pin is too long, it will cause a constant heating problem.

⁣


Discover Cheeft &
Besco Otomotiv, a leading manufacturer of truck brake calipers, repair
kits, and advanced braking solutions trusted worldwide.
With more
than 20 years of experience, Cheeft delivers precision engineering,
top-quality production, and reliable performance for heavy-duty

commercial vehicles.



🌍 Serving customers in over 70 countries, Cheeft stands for:



OEM-compatible caliper repair kits & accessories



State-of-the-art CNC production facilities



Commitment to safety, durability, and performance


🔹 Learn more: www.cheeft.com

Discover Cheeft & Besco Otomotiv, a trusted manufacturer specializing in high-quality brake calipers and innovative braking solutions. In this official company introduction video, we present our expertise, manufacturing capabilities, and commitment to excellence in the automotive industry.
From advanced production facilities to a highly skilled engineering team, Cheeft & Besco Otomotiv delivers world-class products that meet global standards for safety and performance.

www.cheeft.com