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The Bendix Air Disc Brake Chamber is a service chamber for air disc brakes, turning air pressure into the force that applies the caliper. Disc brake chambers bolt directly to the caliper, so the Bendix K028225 has to match the caliper's mounting and stroke rather than an S-cam bracket. A leaking diaphragm reduces that force and can be heard as a hiss when the brakes are applied. A soap test at the port and clamp ring after installation confirms the chamber is sealed.
| Cautionary Note(s) | All vent holes must be open |
| Chamber Type / Size | T20 |
| Clamp Angle | Universal |
| Market Indicator | Aftermarket New |
| Maximum Operating Temperature | 176 AdegF (80 AdegC) |
| Minimum Operating Temperature | -40 AdegF (-40 AdegC) |
| Mounting Stud Length | 1.70 IN (43.2 MM) |
| Port Angle | Universal |
| Push Rod Length [MM] | 15 mm |
| Push Rod Thread / Style | Spherical End |
| Service Chamber Joint Type | Single Clamp Band |
| Service Chamber Vent Holes | All Open |
| Service Port (11) - Center | Not applicable to this part |
| Service Port (11) - Side | 3/8-18 NPTF |
| Stroke | 2.50 IN (63.5 MM) |
| Stud Spacing | 4.75 IN (120.7 MM) |
| Stud Thread Size | M16 x 1.5-6g |
| Country of Origin (Primary) | CZ |
| UPC | 04068078222423 |
| VMRS Code | 013013060 |
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