Description
109659X – TF-750 CAT AIR BRAKE COMPRESSOR – REMANUFACTURED
PART NUMBER(S):
Fleet Products: 109659X (Remanufactured), Replacable with 109809 (TF-550) | Replaces OE: Bendix: 109604, 109633, 109659, 065642, 109777, 066664 | Caterpillar: 117-0070, 1102751, 110-2751, 1609845, 160-9845, 0R8329, 0R9626, 113-7666
DESCRIPTION:
Model: Bendix Tu-Flo 750 (TF-750) CAT Straight M20 22 Tooth Spline Air Brake Compressor
Vehicles: Caterpillar 3406B, 3176, and 3500, C15, C16 Series engine applications
• Compressor Type: 2-cylinder, single-stage reciprocating air brake compressor
• Cooling: Water and air cooled
• Drive Type: Engine driven, flange mount
• Shaft Type: 22-tooth splined shaft
• Air Inlet Location: Left side, viewed from rear
• Air Outlet Location: Left or top optional port position
• Discharge Type: Threaded
• Reversible Cylinder Head: Yes
• Oil Drain: Base drain
• No. of 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 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
• 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
Applications:
Used on Caterpillar 3406B, 3176, and 3500 Series engine applications requiring a high-output TF-750 compressor with 22-tooth splined shaft and optional left or top discharge 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 compressor wear.
CROSS-REFERENCE(S):
1170070, 0R-8329, OR8329, 0R-9626, OR9626, 1137666, 065607, 108732, 109545, 109547, 5005418, 5005473, 5006821, 107023, 109824, 109863
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 22-tooth spline alignment, straight M20 crankshaft thread, flange mounting, and left/top discharge orientation before installation
✔ Confirm reversible cylinder head position before installation; head is secured with 6 cap screws
✔ Maintain minimum 2.5 GPM coolant flow and do not exceed 2400 RPM
✔ Replace all gaskets and fittings, use correct discharge line size with continuous downward slope, and prime oil lines before startup
✔ Suggested torque: cylinder head 300–360 in-lb; inlet/discharge fittings 175–225 in-lb; pipe plugs 35–270 in-lb; crankshaft castle nut 1200–1400 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
