Description
109861X – TF-550 CAT COMPRESSOR (CATERPILLAR 3176J SERIES)
PART NUMBER(S):
Fleet Products: 109861X (Remanufactured) 109142X/109863X (TF-750) | OE: 109861, 109139, 109138, 109816, 5001522, 109321, 109543, 109860, 5001523, 065684 | 118-2798, 131-6679, 132-9813, 131-6679
DESCRIPTION:
Model: TF-550 CAT Compressor Crankshaft: Straight M-20 Thd., 22 Tooth Spline
Vehicles: Caterpillar 3176J Series
• Cylinders: 2
• Bore x Stroke: 2.78 in x 1.50 in
• Displ @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)
• Max Inlet Temp: 250°F
• Max Discharge Temp: 400°F
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 Cooled
• Mounting: Engine Driven, Flange Mount
• Air Inlet Port: Left
• Air Outlet Port: Top or Left (optional discharge positions)
• Shaft Type: Threaded Crankshaft
• Bore: ~2.78 in
• Stroke: ~33 mm
• Discharge Port: 1/2"-14 NPT
• Governor Port: 1/8"-27 NPT
• Features: Built to OEM standards, includes crankshaft options for severe-duty fitments; port orientation viewed from rear
Applications:
Engineered for Caterpillar engines including C10, C12, C15, C16, and 3406 used in heavy-duty trucks, semi trucks, and commercial vehicles. Delivers 13.2 CFM to power brake and auxiliary air systems in linehaul and vocational chassis.
CROSS-REFERENCE(S):
109861, 109139, 109138, 5002032, 5002984, OR8340, 5005606
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
