Description
109861X – TF-550 CAT 3176J AIR BRAKE COMPRESSOR – REMANUFACTURED
PART NUMBER(S):
Fleet Products: 109861X (Remanufactured), Replacable with 109863X (TF-750), 109142X (TF-750) | Replaces OE: Bendix: 109861, 109139, 109138, 109816, 5001522, 109321, 109543, 109860, 5001523, 065684 | CAT: 118-2798, 131-6679, 132-9813
DESCRIPTION:
Model: Bendix Tu-Flo 550 (TF-550) CAT Straight M20 22 Tooth Spline Air Brake Compressor
Vehicles: Caterpillar 3176J Series, C10, C12, C15, C16, and 3406 engine applications
• Cooling: Water cooled
• Mounting: Engine driven, flange mount
• Air Inlet Location: Left side
• Air Outlet Location: Top or left optional discharge positions
• Shaft Type: Threaded crankshaft, straight M20 thread, 22 tooth spline
• No. of Cylinders: 2
• Bore x Stroke: 2.78 in x 1.50 in
• Displacement @ 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 and governed
• Temperature Range: 250°F inlet / 400°F discharge
• Port Sizes: 1/2-14 NPT water in/out, 1/2-14 NPT air discharge, 1/8-27 NPT governor, 1/8-27 NPT oil inlet, 1/2-14 NPT oil return
• Minimum Line Sizes: 1/2 in ID discharge, 3/8 in ID coolant, 3/16 in ID oil supply, 1/2 in ID oil return, 5/8 in ID air inlet, 3/16 in ID unloader
• Port Orientation: Viewed from rear
Applications:
Used on Caterpillar 3176J Series and related C-Series engine applications requiring a TF-550 straight M20 threaded crankshaft compressor with 22 tooth spline configuration. The compressor supplies air for heavy-duty service brake and auxiliary pneumatic systems and is typically replaced due to reduced air delivery, oil carryover, overheating, or internal wear.
CROSS-REFERENCE(S):
1182798, 1316679, 1329813, 5002032, 5002984, OR8340, 0R8340, 0R-8340, 5005606
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 straight M20 threaded crankshaft, 22 tooth spline, flange mounting, and rear-view port orientation before installation
✔ Maintain minimum 2.5 GPM coolant flow and do not exceed 3000 RPM
✔ Use properly sized discharge, coolant, oil supply, oil return, air inlet, and unloader lines as specified
✔ Route the discharge line with proper downward slope, keep oil supply/return lines unrestricted, and drain reservoirs before service
✔ Suggested torque: cylinder head 440–500 in-lb; inlet/discharge fittings 175–225 in-lb; pipe plugs 35–270 in-lb; crankshaft castle nut 1200–1440 in-lb; crankshaft metric nut 2640–3048 in-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.
Warranty Information
