Fast hitch
Posted: Sat Nov 17, 2012 2:01 pm
This is a bit embarrassing for me. The answers could be from my own research, eventually. But perhaps someone here has the answer already and others here could also benefit from the information. None of my Cubs have Fast Hitch, but the 1958 140 does have. As far as I know, the hitch point/"spike"/coupling beam for the 140 and the Cub is identical and fully interchangeable. So perhaps some other parts of the system also interchange.
Acquired an original (shopworn) Operator's Manual for the 140, 1 014 372 R1, 2-18-63--2B. So the manual is a bit newer than is the tractor. In the Lubrication section, it shows grease fittings at the ends of the lower horizontal bar that supports the hitch receiver. On my tractor, that bar is threaded each end, right-hand threads, and the part 520061R1 is threaded internally for mounting onto the shaft. The assumed, but not specifically stated, purpose is for adjustment of the lifting rods so they will be vertical and to permit rotation as the lift is operated.
My parts 520061R1 have no grease fittings and the holes in them are not threaded for such. So one might assume that the original fitting, if any, was a drive fitting. But the two fittings each have different size holes, same part number on both. So two different grease fittings would be required.
So I wonder about several things. Does the Cub use the same part at that place on the system? Does the Cub have grease fittings on those parts? What type grease fittings, threaded or driven? Were the grease fittings added as a revision for later production for the system? On the 140, the bar is 1 1/2" diameter. Is the Cub the same or smaller? Is it possible that the early production, which the R1 suggests, was intended to be lubricated by just butting the grease gun up to the hole and giving it a shot that way? The wall of the 520061R1 is thin for threading and any projection of the grease fitting inside would interfere with the threaded ends of the bar.
What insight can you offer?
Acquired an original (shopworn) Operator's Manual for the 140, 1 014 372 R1, 2-18-63--2B. So the manual is a bit newer than is the tractor. In the Lubrication section, it shows grease fittings at the ends of the lower horizontal bar that supports the hitch receiver. On my tractor, that bar is threaded each end, right-hand threads, and the part 520061R1 is threaded internally for mounting onto the shaft. The assumed, but not specifically stated, purpose is for adjustment of the lifting rods so they will be vertical and to permit rotation as the lift is operated.
My parts 520061R1 have no grease fittings and the holes in them are not threaded for such. So one might assume that the original fitting, if any, was a drive fitting. But the two fittings each have different size holes, same part number on both. So two different grease fittings would be required.
So I wonder about several things. Does the Cub use the same part at that place on the system? Does the Cub have grease fittings on those parts? What type grease fittings, threaded or driven? Were the grease fittings added as a revision for later production for the system? On the 140, the bar is 1 1/2" diameter. Is the Cub the same or smaller? Is it possible that the early production, which the R1 suggests, was intended to be lubricated by just butting the grease gun up to the hole and giving it a shot that way? The wall of the 520061R1 is thin for threading and any projection of the grease fitting inside would interfere with the threaded ends of the bar.
What insight can you offer?