Description
109659X – TF-750 CAT COMPRESSOR (CATERPILLAR 3406B / 3176 / 3500 SERIES)
PART NUMBER(S):
Fleet Products: 109659X (Remanufactured) 109809 (TF-550) | OE: 109777, 066664, 117-0070 | Caterpillar: 1102751, 110-2751, 1609845, 0R8329, 0R9626, 113-7666, 109604, 109633, 109659, 065642
DESCRIPTION:
Model: TF-750 CAT Compressor Crankshaft: Straight M-20 Thd. 22 ToothSpline
Vehicles: Caterpillar 3406B, 3176, 3500 Series
• Compressor Type: 2-Cylinder, Single Stage, Reciprocating
• CFM (Displacement): 16.5 @ 1,250 RPM
• Cooling: Water/Air Cooled
• Drive Type: Engine Driven, Flange Mount
• Shaft Type: 22-Tooth Splined Shaft
• Air Inlet Port: Left (viewed from rear)
• Air Outlet Port: Left or Top (optional port position)
• Discharge Type: Threaded
- Cylinders: 2
- Bore x Stroke: 2.78 in x 1.87 in
- Flow @1250 RPM: 16.5 CFM
- Max RPM: 2400
- HP @1250 RPM /120 PSIG: 3.2 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
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
• Unique Features: Reversible cylinder head, oil base drain, built to OEM standards
• Condition: Remanufactured
Applications:
Designed for Caterpillar 3406B, 3176, and 3500 series engines used in heavy trucks, semi trucks, and vocational vehicles requiring high-output dual-cylinder compressors with optional discharge configurations.
CROSS-REFERENCE(S):
109659, 113-7666, 109604, 065607, 108732, 109545, 109547, 5005418, 5005473, 5006821, 107023, 109824, 5002713X, 109863
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:
✔ Use all new gaskets and seals during installation
✔ Head is reversible to switch air outlet side (secured with 6 cap screws)
✔ Confirm 22-tooth spline alignment prior to install
- Maintain minimum 2.5 gpm coolant flow.
- Do not exceed 2400 RPM. Replace all gaskets and fittings.
- Use correct discharge line size with continuous downward slope.
- Ensure oil lines are primed and leak-free before startup.
- Drain reservoirs and flush coolant and air lines before air system service.
Suggested torque
- Cylinder Head: 300–360 in-lb
- Inlet / Discharge Fittings: 175–225 in-lb
- Pipe Plugs: 35–270 in-lb (size dependent)
- Crankshaft Nut (Castle): 1200–1400 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
