Description
09251X – TF-550 CAT COMPRESSOR (CATERPILLAR 3406B / 3406E / 3176 / C15)
PART NUMBER(S):
Fleet Products: 109251X (Remanufactured) 109287X (TF-750) | OE: CAT 1091317, 1105764, 1442906, 0R3404, 4P0596, 109251X, 1494915, 109-1317, 1091317, 110-5764, 1105764 | 0R3404, 109250, 109251, 109279, 109335, 065475
DESCRIPTION:
Model: TF-550 CAT Compressor
Vehicles: Caterpillar 3306/3300
- Cylinders: 2
- Bore x Stroke: 2.78 in x 1.50 in
- Flow @1250 RPM: 13.2 CFM
- Max RPM: 3000
- HP @1250 RPM /120 PSIG: 2.5 HP
- Min Coolant Flow @Max RPM: 2.5 gpm
- Min Unload Pressure: 60 PSIG
- Oil Pressure: 15 PSIG (idle & governed)
- Temp Range: 250°F inlet / 400°F discharge
Port Sizes (NPT)
- Water In / Out: 1/2-14
- Air Discharge: 1/2-14
- Governor: 1/8-27
- Oil Inlet: 1/8-27
- Oil Return (base): 1/2-14
Minimum Line Sizes
- Discharge: 1/2 in ID
- Coolant: 3/8 in ID
- Oil Supply: 3/16 in ID
- Oil Return: 1/2 in ID
- Air Inlet: 5/8 in ID
- Unloader: 3/16 in ID
• Cooling: Water/Air Cooled
• Mounting: Engine Drive, Flange Mount
• Air Inlet: Left (may vary by variant)
• Air Outlet: Top (Left discharge also documented)
• Discharge Type: Threaded
• Spline: 22 Tooth
Applications:
Fits Caterpillar 3306, 3406B, 3406E, 3176, and C15 engines used in Class 8 trucks, commercial tractors, and heavy-duty fleet vehicles. Known for its reliable 13.2 CFM output in air brake systems, the TF-550 is compatible with multiple engine platforms requiring flange-mounted, dual-cylinder compressors. TAKE CARE WITH FLANGE - IF 3 BOLT, USE 109603X
CROSS-REFERENCE(S):
109251X, TF-550, 1494915, 5011016X, 109139X, 0R3659, 107622X, 107981X
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:
- Maintain minimum 2.5 gpm coolant flow.
- Do not exceed 3000 RPM.
- Use properly sized discharge line with downward slope.
- Ensure oil supply/return lines are unrestricted before startup.
- Drain all air reservoirs before service.
Suggested torque
- Cylinder Head: 440–500 in-lb
- Inlet / Discharge Fittings: 175–225 in-lb
- Pipe Plugs: 35–270 in-lb (size dependent)
- Crankshaft Nut (Castle): 1200–1440 in-lb (100–120 ft-lb)
- Crankshaft Nut (Metric): 2640–3048 in-lb (220–254 ft-lb)
SOLD AS REMANUFACTURED | CORE RETURN REQUIRED
Built to OEM standards | thoroughly cleaned, inspected, and tested to ensure durability, performance, and reliability in demanding applications.
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Warranty Information
