Description
K021559-G - SR-7 SPRING BRAKE VALVE
PART NUMBER(S):
Fleet Products: K021559-G | Replaces OE: Bendix: K021559, 5010393, 5012472, 5012831, 5018545, K021248, K021458, K021459, 801536, BEN-K021559, BENK021559, BXK021559, K021559BXW | Freightliner: BWK021559, BW K021559 | Mack: 745-K021559 | Newstar: S-27029, S27029
DESCRIPTION:
Model: Bendix SR-7 Spring Brake Valve
Vehicles: Commercial vehicles using compatible dual-circuit air brake and spring brake systems
• Valve Type: Pneumatic spring brake modulating valve
• Supply Port: One 1/2" NPT
• Delivery Port: One 3/8" NPT
• Control Port: One 3/8" push-to-connect fitting with 90° orientation
• Balance Port: One 3/8" push-to-connect straight fitting
• Park Control Port: One 1/4" NPT
• Spring Brake Hold-Off Pressure: 107 PSI
• Mounting: Stud mount with 3/8"-16 threads and 0.94" stud length
• Dimensions: 4.88" high x 5.28" long x 5.39" wide
• Construction: Corrosion-resistant composite and cast housing
• Function: Modulates spring brake application and release while balancing pressure between compatible air brake circuits
Applications:
Designed for dual-circuit air brake systems requiring controlled spring brake application and release through an SR-7 valve. It is typically replaced when spring brakes release slowly, apply unexpectedly, fail to hold off correctly, or the valve develops internal or external air leakage.
CROSS-REFERENCE(S):
TWDBENK021559, BANK021559, KO21559, 060-KO21559, 670-S27029
A cross-reference listing means this part may be a suitable replacement for the listed part numbers. Always verify fitment before installation.
IMPORTANT INSTALLATION NOTES:
✔ Mount the valve using the 3/8"-16 studs and the vehicle manufacturer's specified torque.
✔ Confirm the 90° control fitting and straight balance fitting match the original orientation.
✔ Use compatible tubing with the push-to-connect control and balance ports.
✔ Verify the air brake system is compatible with the 107 PSI spring brake hold-off specification.
✔ Pressurize and leak-test the system, then verify complete spring brake application, release, and pressure retention.
Warranty Information
