Description
277122X – TF-500 MACK AIR BRAKE COMPRESSOR – REMANUFACTURED
PART NUMBER(S):
Fleet Products: 277122X (Remanufactured) | Replaces OE: Bendix: 275586, 277122, 283784, 283785, 284327, 284405, 284406, 284407, 285128, 285129, 285717, 285718
DESCRIPTION:
Model: Bendix Tu-Flo 500 (TF-500) Mack Air Brake Compressor
Vehicles: Mack V8 engine applications in heavy trucks, semi trucks, 18 wheelers, and commercial trucks
• Cooling: Water cooled
• Air Inlet Location: Left
• Air Outlet Location: Left
• Mounting: Flange mount, Foxhead, engine drive
• Discharge Type: Flange
• No. of Cylinders: 2
• Bore: 2.5 in
• Stroke: 1.6875 in
• Displacement @ 1250 RPM: 12 CFM
• Max RPM: 3000 water cooled / 2400 air cooled
• Coolant Flow: 2.5 GPM
• Air Flow Requirement: 250 CFM
• HP @ 1250 RPM: 2.3 HP
• Temperature Range: 250°F inlet / 400°F discharge
• Unload Pressure: 60 PSI
• Oil Pressure: 5 PSI idle / 15 PSI maximum
• Oil Capacity: 0.53 qt
• Line Sizes: 5/8 in OD discharge, 1/2 in OD coolant, 1/4 in OD oil supply, 5/8 in OD oil return, 5/8 in ID air inlet
Applications:
Used on Mack V8 engine applications requiring a TF-500 compressor with Foxhead flange mounting, engine-drive configuration, left-side inlet/outlet orientation, and flange discharge. The compressor supplies air for service brake and auxiliary pneumatic systems and is typically replaced due to reduced air output, oil carryover, overheating, or internal wear.
CROSS-REFERENCE(S):
E-BN277122X, 745X277122, CC277122
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:
✔ Verify Mack V8 fitment, short mount configuration, Foxhead flange mount, and engine-drive setup before installation
✔ Confirm left-side inlet and outlet port orientation viewed from the rear
✔ Use installation gaskets as required during installation
✔ Check discharge, coolant, oil supply, oil return, and air inlet lines for restrictions before startup
✔ Maintain 2.5 GPM coolant flow and confirm cooling configuration before applying maximum RPM limit
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
