rmissildine
Member
Last year I bought a 1970 135 diesel to use for moving round bales of hay with the 3 point lift. Never used the pto, but I did check it out by shifting lever to engine and ground to ensure that the output shaft did turn in both settings.
This year after buying a new tractor with fel and hay spear, I decided to sell the 135. I hooked up my 6' finish mower to check it out again. I shifted into engine pto and eased the clutch up to engage. The mower spun up. I increased the throttle up to pto rpm's, everything fine. I started to mow some grass about 4 - 5 high and a little thick. Once the mower entered the thick grass, the pto bogged down and all but stopped. I raised the lift and the pto slowly sped back up a bit but not to full 540 rpm's.
My first thought was the pto clutch was slipping. I pulled the cover from the bottom of the bell housing to inspect the disc and adjustment clearance. The disc looked fine all the way around, no oil in the area and dry but the bolt clearance was a bit wide so I adjusted all 3 to .060 and the pedal free play to 5/16 as per Big Dean's instructions. Tried it again. Now the slight grind when shifting into engine speed is gone and the pto spins up. Tried to mow again and the same thing, pto slows down.
After searching this forum I can't find any post that mentions my specific problem. I did find a few that mentioned a couple of different areas of a possible problem. The first would point to the pto clutch, in that in engine pto the hydraulic pump shaft will stop spinning with the pedal completely depressed. Haven't tried that out yet but, with the mower spinning slowly under load the lift still works fine, no difference that I can tell in the lift speed.
The second points to the ground / engine pto selector gear and shift shaft. Haven't checked that out yet either, but plan to when weather clears up.
Sorry for the long post, but I wanted to give as much info as possible and to try and get some ideas as to where to start looking for the problem that could cause this.
Thanks,
Roger
This year after buying a new tractor with fel and hay spear, I decided to sell the 135. I hooked up my 6' finish mower to check it out again. I shifted into engine pto and eased the clutch up to engage. The mower spun up. I increased the throttle up to pto rpm's, everything fine. I started to mow some grass about 4 - 5 high and a little thick. Once the mower entered the thick grass, the pto bogged down and all but stopped. I raised the lift and the pto slowly sped back up a bit but not to full 540 rpm's.
My first thought was the pto clutch was slipping. I pulled the cover from the bottom of the bell housing to inspect the disc and adjustment clearance. The disc looked fine all the way around, no oil in the area and dry but the bolt clearance was a bit wide so I adjusted all 3 to .060 and the pedal free play to 5/16 as per Big Dean's instructions. Tried it again. Now the slight grind when shifting into engine speed is gone and the pto spins up. Tried to mow again and the same thing, pto slows down.
After searching this forum I can't find any post that mentions my specific problem. I did find a few that mentioned a couple of different areas of a possible problem. The first would point to the pto clutch, in that in engine pto the hydraulic pump shaft will stop spinning with the pedal completely depressed. Haven't tried that out yet but, with the mower spinning slowly under load the lift still works fine, no difference that I can tell in the lift speed.
The second points to the ground / engine pto selector gear and shift shaft. Haven't checked that out yet either, but plan to when weather clears up.
Sorry for the long post, but I wanted to give as much info as possible and to try and get some ideas as to where to start looking for the problem that could cause this.
Thanks,
Roger