Description
K021558-G – SPRING BRAKE VALVE
PART NUMBER(S):
Fleet Products: K021558-G
OE: K021558, 0091559, 745-K021558, K021557
DESCRIPTION:
Model: SR-7 Spring Brake Modulating Valve
Vehicles: Universal fitment for heavy-duty trucks and trailers
• Valve Type: Spring brake modulating valve (SR-7)
• Function: Controls spring brake application and release; supports faster spring brake engagement during parking
• Mounting Studs: 3/8"-16, 0.94" length
• Control Port: 3/8" push-to-connect
• Balance Port: 3/8" push-to-connect
• Supply Port: 1/2" NPT
• Delivery Ports: 4 × 3/8" NPT
• Park Control Port: 1/4" NPT
• Control/Balanced Alt: straight 3/8" NPT
• Physical Dimensions: 125 mm (L) × 137 mm (W) × 124 mm (H)
• Weight: Approx. 1.42 kg (3.15 lbs)
• System Compatibility: For use in dual air brake systems with spring brake actuators
• Performance: Provides park brake modulation; improves air flow response and reliability in service/parking scenarios
• VMRS Code: 013-010-496
• Notes: Interchangeable with multiple OEM units, wide cross-brand compatibility
• Design: Bolt-on unit, OEM-style footprint for retrofit or replacement
Applications:
Designed for use in dual air brake systems on commercial vehicles. Functions as a spring brake modulator, allowing precise control over the park brake circuit. Ensures fast and consistent air actuation across a variety of makes and models. Used primarily on heavy-duty trucks and trailers with spring brake actuators.
CROSS-REFERENCE(S):
K021558, 0091559, 21558, 3525518, 5010393, 5010914, 5010915, 5010916, 5010917, 5011180, 5012045, 5012046, 5013055, 5017233, 642015, 745-K021558, 745K021558, 801328, 801329, 91559, BANK021558, BENK021558, BW K021558, BWK021558, BXK021558, K021246, K021292, K021293, K021295, K021297, K021442, K021558BXW, K025932, K041542, K041547, K041894, K043387, K049149, K049151, K049152, K049153, K049154, K049155, S-27028, S27028, T5010851, T5010851A, TWDBENK021558, KO21558, 060-KO21558A cross-reference listing means this part may be a compatible replacement for these part numbers based on OEM or distributor data.
IMPORTANT INSTALLATION NOTES:
✔ Confirm 3/8"-16 stud length and thread engagement prior to mounting
✔ Control and balance ports must be securely connected with push-to-connect or straight 3/8" NPT fittings
✔ Ensure correct routing of supply and delivery ports for optimal spring brake response
✔ Verify compatibility with SR-7 style replacement footprint before installation
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Warranty Information
