Description
BA-921 DETROIT CERTIFIED REMANUFACTURED AIR BRAKE COMPRESSOR
PART NUMBER(S):
Fleet Products: K035912X (Remanufactured) | Replaces OE: Bendix: K034111, K035911, K035912, K095125, K095731, RK095125, S-37121 | Detroit Diesel / Mercedes: 0011307215, A0011304915, A0011305315, A0011307215, A4711300215, A4711301715, A4711302515, EA4711300215, EA4711301715, EA4711302515, RA0011307215, RA4711300215, RA4711301715, RA4711302515, 4711300215, 4711301715, 4711302515 | Automann: 170.ACK035912
DESCRIPTION:
Model: Bendix BA-921 Detroit Air Brake Compressor
Vehicles: Freightliner and Western Star with 2010 EPA Detroit DD13 and DD15 engines
• Configuration: Closed room head
• Air inlet location: Top mount
• Air inlet tube: 1 3/8 in
• Air outlet location: Top-mounted
• Exhaust port: M26 × 1.5
• Coolant ports: M18 × 1.5
• Thru-drive: Yes, accessory mounting capable
• EPA application: 2010+ Detroit Diesel engines
• Cylinders: 1
• Bore × Stroke: 3.622 in × 2.126 in
• Rated displacement: 15.8 CFM @ 1250 RPM
• Flow: 11.6 CFM @ 1800 RPM / 120 PSI
• Flow: 16.5 CFM @ 3000 RPM / 120 PSI
• Power requirement: 4.6 HP loaded / 0.8 HP unloaded @ 1800 RPM / 120 PSIG
• Minimum coolant flow: 1.5 GPM
• Minimum oil pressure: 15 PSI
• Minimum governor cut-out pressure: 120 PSI
• Minimum unloader line I.D.: 3/16 in
• Temperature range: 170°F inlet / 400°F discharge
• Cylinder head fastener torque: 265–292 in-lb
• Governor adapter fastener torque: 195–213 in-lb
• Rear end cover fastener torque: 195–213 in-lb
• Inlet port fitting: M27 × 2, 991–1089 in-lb
• Discharge port fitting: M22 × 1.5, 814–912 in-lb
• Water port fitting: M18 × 1.5, 593–637 in-lb
• Oil port fitting: 7/16-16 UNF, 150–170 in-lb
• Unloader port fitting: 1/8-27 NPT, 2–3 turns from finger tight
Applications:
Designed for Freightliner and Western Star vehicles equipped with 2010 EPA Detroit DD13 and DD15 engines requiring a Bendix BA-921 air brake compressor. Supplies compressed air for heavy-duty air brake systems using the original top-mounted inlet/outlet, closed room head, and thru-drive configuration.
CROSS-REFERENCE(S):
K034111, K035911, K035912, K095125, K095731, RK095125, S-37121, 0011307215, A0011304915, A0011305315, A0011307215, A4711300215, A4711301715, A4711302515, EA4711300215, EA4711301715, EA4711302515, RA0011307215, RA4711300215, RA4711301715, RA4711302515, 4711300215, 4711301715, 4711302515, 170.ACK035912, 1100-330-001, 1100.330.001, 1100330001, 165-179-0017, 1651790017, 701296AT, DDE RA4711301715, DDEA0011307215, DDEA4711302515, DDEEA4711302515, DDE-EA4711301715, DDE-EA4711302515, DDE-RA4711300215, DDE-RA4711302515, EA0011307215, HDX-K035912X, K035912X, K095125X, MD K035912X, MD K035912XRR
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:
✔ Maintain minimum coolant flow of 1.5 GPM
✔ Confirm external oil supply line is connected before startup
✔ Verify air, oil, and coolant fittings are properly sealed before operation
✔ Drain air reservoirs before servicing air brake components
✔ Replace all mounting gaskets and sealing components during installation
✔ Check for air, oil, and coolant leaks after the system reaches operating pressure
✔ Torque all fasteners and fittings to the specified values before returning vehicle to service
SOLD AS REMANUFACTURED – CORE RETURN REQUIRED
Built to OEM standards — thoroughly cleaned, inspected, and tested to ensure durability, performance, and reliability in demanding applications.
Warranty Information
