Description
TF-550 AIR BRAKE COMPRESSOR – NAVISTAR DT466/HT530 APPLICATION
PART NUMBER(S):
Fleet Products: 5004613X (Remanufactured) | OE: DINA 2991783C91 | Mack 745065457, 745O65457 | Navistar 1694005C91, 1694005C92, 2003252C94, 2003252C95, 2003252C97 | VOLVO 85102174, 5004613, 3663597C91
DESCRIPTION:
Model: Tu-Flo 550
Vehicles: Navistar DT466/HT530/HT570 Engines (1987+), 3600 School Bus Chassis, 4000/4700 Medium Trucks, IC Buses
• Engine Fitment: DT466, HT530, HT570 diesel platforms
• Displacement: 12 CFM @ 1250 RPM
• Cooling Type: Water-cooled
• Mounting: Flange
• Pulley Drive: Belt-driven
• Crankshaft: Tapered shaft with 11-tooth gear
• Inlet Port: Left side
• Outlet Port: Top (vertical discharge)
• Port Type: Metric (for HT530/HT570 variants)
• 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
Applications:
The TF-550 is a heavy-duty air brake compressor used in Navistar DT466 and HT-series engines found in vocational trucks, buses, and fleet chassis. Designed for long-duty cycles and durability, it powers pneumatic systems such as brakes, suspension, and accessories.
CROSS-REFERENCE(S):
5004613, 3663597C91, 1694953C91, 570287C94, 5014488X, 5004614X, 5014144X, 0109087, 0109088, 043074, 065457, 109087, 109088, 1694005C91, 1694005C92, 2003252C91, 2003252C92, 2003252C93, 2003252C94, 2003252C95, 2003252C96, 2003252C97, 5004611, 5004613, 5012663, 65457, 800468, 801484, 9555004613
A cross-reference listing means this part may be a compatible replacement for the part numbers listed based on OE or distributor data.
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
