310-8 shifter broke off while mowing

[Tomatodave 7]

Actually I don’t believe that pin exists on this year make/ model.  Here is pic

i have a 2110K805 310-8

[Marv 943]

I never saw one that did not have the pin. Seems odd the hole went all the way through the shaft if there was no pin used. Sure wouldn't want the pin floating around in the transmission and get caught up in the gears. Might break something.

Marv

[Tomatodave 7]

There is no hole towards the rear for any type of pin???  Only hole was to the front for the dog pin set screw which went to the donut.   I’m confused

[gwest_ca-(File Mod) 11,095]

Some donuts are welded to the shifter. I can see eliminating the pin if it is a welded assembly but if not welded the pin is an absolute must.

 

The pins have sheared on non-welded shifters but not allowed the donut to slide up the shifter. In these cases the shifter will rotate instead of shifting gears.

The bends in the shifter make it a crank if it is allowed to turn. The donut secured to the shifter and located by the setscrew prevents rotation.

Garry

[953 nut 55,769]

12 hours ago, Tomatodave said:

There is no hole towards the rear for any type of pin???  Only hole was to the front for the dog pin set screw which went to the donut.   I’m confused

I took a look at the shift lever from my spare 312-8 transmission and the donut is welded and no hole for the roll pin. I think you are going to be fine.

[tunahead72 2,432]

@Tomatodave I'm going to add to the confusion a bit, but also hopefully make you aware of a possibility...

 

I have a 1986 310-8 (21-10K802).  The parts manual shows exactly the set up you showed in post #26 above.  But I had my shift lever out several years ago, and the donut was not welded, and there was a separate (damaged) roll pin that wasn't shown in my manual.

 

So be aware.  I know you've already installed a new shifter, but if anything feels or acts unusual as you're using it, I would remove it and take another very close look at the donut.  You may actually have a roll pin there, maybe ground flush with the outer edge of the donut.

 

[Tomatodave 7]

Tuna head.....I’ll ditto that.  The replacement shifter I got was welded however the original(I’m only owner) on my 310-8 was not welded and also no hole on the gear box towards the rear

 

[stevasaurus 22,863]

I'm more concerned that the missing roll pin might get caught in between gears and break off some teeth.  With any luck, the roll pin made it's way to the bottom and is stuck in some sludge.  With some bad luck, in the right place, it could actually jam your transmission or break it.  I would put the trans in neutral and fish some more with a magnet.  I would certainly consider opening the trans to find it and get it out of there.  

   As far as the new shifter, you need the correct roll pin to hold the doughnut onto the shift rod.  The roll pin goes in until flush with the back of the doughnut, which leaves a hole for the dog point set screw to go in, and hold the whole thing in place in the shifter hole.   

 

edit...   I just read where you think you may not have had the roll pin.  You should be good to go then.  

[tunahead72 2,432]

11 minutes ago, stevasaurus said:

I'm more concerned that the missing roll pin might get caught in between gears and break off some teeth.  With any luck, the roll pin made it's way to the bottom and is stuck in some sludge.  With some bad luck, in the right place, it could actually jam your transmission or break it.  I would put the trans in neutral and fish some more with a magnet.  I would certainly consider opening the trans to find it and get it out of there.   ...

 

Agreed.  @Tomatodave Is part of the roll pin still inside the donut?  You might consider at least draining the fluid and checking inside the transmission with a magnet.

 

12 minutes ago, stevasaurus said:

... As far as the new shifter, you need the correct roll pin to hold the doughnut onto the shift rod.  The roll pin goes in until flush with the back of the doughnut, which leaves a hole for the dog point set screw to go in, and hold the whole thing in place in the shifter hole.  

 

But he said there's no hole in the gear box for a roll pin?  I'm definitely confused now. 

 

[Tomatodave 7]

I think I have finally made sense of all of this...   on a shift rod that’s not welded there has to be a hole that goes straight thru the shift rod.    That keeps the donut on the rod at that level.  The set screw simply prevents the whole rod from dropping down in the gear box ...this scenario was the one I had so that roll pin is either in my lawn hopefully or down in the gear box

 

the new shifter is welded therefore no roll pin needed 

 

so I will try to fish around in that gear box but I believe that is so small is could drop all the way to bottom of that box

 

i have driven it around already using all the gears and like brand new!  Ha

 

if that pin gets caught somewhere I’ll consider it time to move on to a new mower.  

 

Roll the dice