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Disassembling an Eaton Fuller 210 Series heavy-duty manual transmission during a major shop rebuild? Attempting to extract tightly pressed countershaft rear bearings using mechanical jaw pullers, pry bars, or oxy-acetylene torches leads directly to chipped gear teeth, cracked aluminum rear cases, and scored shaft journals. The M40110 Fuller Countershaft Bearing Puller delivers 100% parallel, concentric extraction force to pop 210 Series countershaft bearings cleanly off their shafts without case or journal damage.

The Critical Physics of Eaton Fuller Countershaft Bearing Extraction

On commercial Class 8 trucks equipped with legendary Eaton Fuller 210 Series twin-countershaft transmissions (including 10, 13, and 18-speed models), the countershaft bearings endure immense radial loads and continuous gear mesh forces. Over hundreds of thousands of miles, these heavy press-fit roller bearings bond tightly to the countershaft journals. When transmission reconditioning requires bearing removal, standard 2-jaw or 3-jaw pullers are virtually impossible to position correctly inside the cramped rear transmission housing. Furthermore, jaw pullers hook under the outer race, applying off-axis side pressure that cocks the inner race against the shaft landing. This galling action gouges vertical grooves into the precision-ground countershaft journal or cracks the cast-iron/aluminum case web. The M40110 puller completely resolves these teardown challenges. Custom-engineered specifically for the exact race dimensions and tight housing clearances of Fuller 210 Series countershafts, this specialty puller features precision-machined collet halves that lock securely into the bearing groove. By tightening its central forcing screw against a rigid bridge plate, the tool applies thousands of pounds of perfectly vertical extraction force, drawing pressed bearings off the shaft down a 100% linear axis in seconds.

• Targeted Eaton Fuller 210 Series Compatibility – Precision-engineered specifically for extracting countershaft bearings on Eaton Fuller 210 Series heavy-duty transmissions.
• Direct Specialty Tool Functional Equivalent – High-strength aftermarket replacement equivalent for standard Fuller shop tool part number **M40110** (M-40110 / 40110).
• Concentric 360-Degree Collet Lock – Engages bearing races uniformly to prevent off-axis cocking, inner race fracture, or shaft journal scoring.
• Protects Transmission Cases & Gears – Fits inside tight rear housing cavities to pull bearings without torch heating or hammer shock impact.
• Industrial Heavy-Duty Metallurgy – Weighing a solid 3.00 lbs, this heat-treated tool steel puller assembly is built for daily commercial use in transmission overhaul stalls.

Stop Prying on Countershaft Bearings. Command Total Fuller Transmission Rebuild Precision.

The M40110 Fuller Countershaft Bearing Puller 210 Series is an indispensable capital asset for commercial truck repair shops, fleet overhaul centers, transmission rebuild facilities, and heavy-duty field mechanics. Prevent shaft damage, streamline teardowns, and extract countershaft bearings with complete mechanical authority using Apex tools.

Technical Specifications

Technical Metric	Value / Fitment Reference Guidelines
Target Transmission Platform	Eaton Fuller 210 Series Heavy-Duty Manual Transmissions
Primary Operational Function	Safe, damage-free removal of tight press-fit countershaft bearings
Specialty Tool Cross Reference	Direct functional replacement for Fuller tool model M40110 (M-40110 / 40110)
Part / Model Reference Number	M40110 (M40110 / 40110)
Construction Metallurgy	High-tensile heat-treated forged alloy steel
Total Package Shipping Weight	3.00 lbs (Heavy-duty precision-machined shop puller assembly)

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