Description
108866X – TF-550 MACK V-MACK STEP HEAD AIR BRAKE COMPRESSOR (W/O GEAR) – REMANUFACTURED
PART NUMBER(S):
Fleet Products: 108866X (Remanufactured), Replacable with 108869X (TF-750) | Replaces OE: Bendix: 065387, 108864, 108865, 108866, 5002865 | Mack: 303GB5114, 303GB5114A, 745108866, 745800354, 745X-108866, 745X108866 | Volvo: 85102173
DESCRIPTION:
Model: Bendix Tu-Flo 550 (TF-550) Mack V-Mack Step Head Air Brake Compressor
Vehicles: Mack CH613, CX613, Granite, Vision, RD688, and other heavy-duty truck platforms
• Mounting Type: Flange mount, Mack extended flange, V-Mack step head
• Cooling: Water and air cooled, water-cooled head and air-cooled block
• Operating Pressure: Max 10 bar / 145 PSI
• Crankshaft Thread: M20 x 1.5
• Lubrication: Supplied by engine
• Air Inlet Location: Right side
• Air Outlet Location: Right or top
• No. of Cylinders: 2
• Bore x Stroke: 2.78 in x 1.50 in
• Flow @ 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
Applications:
Used on Mack heavy-duty truck platforms requiring a V-Mack step-head TF-550 compressor with right-side inlet and right or top discharge configuration. The compressor supplies air for service brake and auxiliary air systems and is typically replaced due to reduced air output, oil carryover, overheating, or internal compressor wear.
CROSS-REFERENCE(S):
800354, 170.AC108866, 04625108866X, 1694005C92, 4015690, 4015690X, 4015691, 4015692, 4015693, A108866X, AT108866X, BX4015690, D108866X, E108866X, EU108866X, FIP108866X, FP108866X, H108866X, HDATP108866X, MHC108866X, MPX108866X, NTP108866X, PHD108866X, PI108866X, PP108866X, RTC108866X, SH108866X, SKF108866X, SL108866X, ST108866X, TMK108866X, TP108866X, TRW108866X, V108866X, VIPAR108866X
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 V-Mack step head, extended flange mounting, crankshaft thread, and right/top discharge configuration 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 and ensure oil supply/return lines are unrestricted before startup
✔ 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
