Description
TYPE 20 SVC. CHAMBER
Part Number: F20SCC
Direct replacement (cross ref) for 20SC.
Product Overview
This aftermarket Type 20 SVC (Spring Volume Control) chamber is part of the truck’s air brake system. It helps regulate spring brake application by controlling air pressure in the brake chamber, ensuring predictable and safe braking. Proper SVC function is critical for driver safety, vehicle control, and fleet reliability.
What the SVC Chamber Does
The Type 20 SVC chamber converts air pressure into mechanical force to engage or release the spring brake. By controlling volume and pressure, it prevents abrupt brake application or release, protecting the driver, cargo, and other road users.
A properly functioning SVC chamber provides consistent braking performance, even under varying load conditions.
Common Problems This Part Solves
Chambers can fail due to diaphragm wear, corrosion, or internal spring fatigue. Symptoms include uneven braking, difficulty releasing the parking brake, hissing air leaks, or reduced brake response. Replacing worn chambers restores predictable brake engagement and reduces maintenance risks.
Compatibility and Fitment
This aftermarket SVC chamber replaces the listed OEM part number 20SC. Confirm that the brake system type, mounting style, and pushrod length match the original.
Installation Notes
Installing an SVC chamber requires caution. Air lines must be disconnected, and the system must be fully depressurized. Mounting bolts, pushrod adjustment, and connection fittings should be checked and torqued to specification. After installation, brake operation must be tested for correct stroke and response.
Use Case
This Type 20 SVC chamber is used in fleet maintenance, brake overhauls, and general air brake service. Proper function is key for safe braking, reduces downtime, and extends the life of the entire braking system.
About Us
We’re a family-owned group of Peterbilt dealerships dedicated to getting you the parts you need quickly and affordably. Whether you’re looking for Paccar OEM parts, reliable aftermarket replacements, or popular upgrades like seats and filters, we make it easy to keep your truck running and on the road. If you don’t see what you need online, just give us a call or send an email — chances are we can get it. We pride ourselves on fast service, fair prices, and being a partner you can depend on when downtime isn’t an option.
