Product Description
LP3997X – BA-921 SIDE MOUNT COMPRESSOR
PART NUMBER(S):
Fleet Products: LP3997X (Remanufactured) | Haldex: 5018485X | Bendix: 5012533X
DESCRIPTION:
Model: BA-921 Side Mount Compressor
Vehicles: Heavy trucks, semi trucks, 18 wheelers, commercial trucks, Navistar, Caterpillar, International MaxxForce
• Mounting Type: Side Mount (Engine Block Face)
• Cooling: Water Cooled Cylinder Head, Air Cooled Crankcase
• Cylinder: Single
• Piston Diameter: 3.622 in. (92 mm)
• Stroke: 2.126 in. (54 mm)
• Rated Displacement: 15.8 CFM @ 1250 RPM
• Flow @ 1800 RPM & 120 PSI: 11.6 CFM
• Flow @ 3000 RPM & 120 PSI: 16.5 CFM
• Air Inlet Port: 1 3/16"-12 UN-2B (Aluminum Head) / M27x2-6g (Cast Iron Head)
• Air Delivery Port: 7/8"-14 UNF-2B (Aluminum Head) / M22x1.5-6g (Cast Iron Head)
• Water Port: 3/4"-16 UNF-2B (Aluminum Head) / M18x1.5-6g (Cast Iron Head)
• Unloader Port: 1/8" NPTF
• Minimum Coolant Flow: 1.5 gal/min (max RPM)
• Maximum Inlet Air Temperature: 170°F (Standard), 250°F (Closed Room Version)
• Maximum Discharge Air Temperature: 400°F
Applications:
The LP3997X – BA-921 Side Mount Compressor is engineered for air brake systems in heavy-duty vehicles such as semi-trucks, 18-wheelers, and commercial trucks. Specifically designed for Navistar, Caterpillar, and International MaxxForce engines, it ensures reliable air pressurization for brake actuation. It features a side mount configuration, water-cooled cylinder head, and special crankcase for ETECH block clearance.
CROSS-REFERENCE(S):
K028383X, K028383, 3624499C91, 3624499, K3997, BXK237295SC, 702020AT, K237295SC, 5002868X, 107004, 107510, 5002868, 107510X
A cross-reference listing means this part is a suitable replacement for the part numbers listed. Please confirm all ports and dimensions match your application before installing.
IMPORTANT INSTALLATION NOTES:
✔ Built to OEM standards, thoroughly cleaned, inspected, and tested for durability and reliability.
✔ Core return required for remanufactured units.
✔ Install according to specified mounting, air inlet, and outlet configurations.
✔ Torque the cylinder head, unloader cap, governor adapter, and other fittings to the specified values (refer to service data for torque values).
✔ For installation guidance or fitment confirmation, call Fleet Products technical support at 1-877-243-0442.
SOLD AS REMANUFACTURED | CORE RETURN REQUIRED
Built to OEM standards | thoroughly cleaned, inspected, and tested to ensure durability, performance, and reliability in demanding applications.
SUPPORT & ORDERING
For technical support, installation guidance, or to confirm fitment, Call: 1-877-243-0442 | Email: sales@fleet-products.com
WHY CHOOSE FLEET PRODUCTS | KBR - HEAVY DUTY TRUCK & TRAILER PARTS?
- Canadian-owned and operated since 1985
- Trusted by fleets, mechanics, and B2B partners across North America
- Fast, reliable shipping across North America
- Competitive pricing with core return refunds
- Price Match Guarantee | Find a better price? Well beat the difference by 10%!
