48A26 PTO Over Running Coupler 540 RPM Slip Over Run Clutch 1-3/8" Male 1-3/8" Female

Replacement part: PTO Over Running Coupler 540 RPM Slip Over Run Clutch 1-3/8" Male 1-3/8" Female. 

Configuration: Over running clutch coupler for the 540 RPM power take off stub. It lets a heavy rotating implement coast down on its own instead of back driving the tractor forward after the clutch goes in.
Specifications
Tractor end: 1-3/8 in, 6 spline, female
Implement end: 1-3/8 in, 6 spline, male
Speed: 540 RPM
Maximum horsepower: 75 HP
Included: two grease fittings, roll pin, and two 7/16 in trailer linch pins
Cross reference
48A26
C660F
C660FI
MIS138
3013-1000
What it is and is not
An over running clutch free wheels in one direction so a flywheel driven implement cannot push the tractor. It is not a slip clutch and it does not protect the driveline from a shock load or a jammed cutter. Those are two different parts and many listings confuse them.
Before ordering
Count the splines and measure the stub. A 1-3/4 in twenty spline or a 1-3/8 in twenty one spline shaft will not take this coupler.
Aftermarket replacement part. Not manufactured by, sponsored by or affiliated with any equipment maker named here. All makes, models and numbers are listed for reference only.

Reference numbers: 48A26, C660F, C660FI, MIS138, 3013-1000

• Over running clutch coupler for the 540 RPM power take off stub. It lets a heavy rotating implement coast down on its own instead of back driving the tractor forward after the clutch goes in.
• Before ordering
• Count the splines and measure the stub. A 1-3/4 in twenty spline or a 1-3/8 in twenty one spline shaft will not take this coupler.
• Aftermarket replacement part. Not manufactured by, sponsored by or affiliated with any equipment maker named here. All makes, models and numbers are listed for reference only.