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FWD only going backwards

#1

J

juntjoo

Vid optional. Pretty simple. Gearbox stuck only able to go backwards. Forward only works with aid of belt, from above.

Stuck gearbox


#2

R

Rivets

You are going to have to post the model and serial numbers for the unit so we have some idea of the tranny you have. That tranny is used on many different models and not all are the same. Second, take the wheels off and post a picture of the wheel gear and picture of the drive gear. Willing to bet that the tranny isn’t the problem.


#3

S

slomo

As Rivets was leading to, maybe dirt all in the wheel/bearing/sleeve/gear area.

I would clean that old dead grease out while you are there. That looks ultra sticky with no flow to protect parts. Old paint pan, some Diesel and an old paint brush. Clean that sucker out.


#4

R

Rivets

Cleaning and repacking the tranny is not going to matter, unless you want to think it will solve the problem. To me that lube looks fine.


#5

S

slomo

Agreed on the lube repack being not a decisive diagnosis of his issue. Just said while he was there.......

My opinion, that roofing tar sludge has to go.

So you would actually leave that 1967 Flex Seal in there, in a mower YOU own? Cool. (y)


#6

R

Rivets

If that tranny is the one I think it is, the lube will outlast the tranny. Cost of removing the old lube, cleaning and repacking is not worth it, even for a DIY guy. The only place you need a little lube is between the bevel gear and the pinion gear, which you can’t even see because it is surrounded by lube.


#7

J

juntjoo

Thanks guys. It's a Toro Recycler Briggs & Stratton 20065. Hmm... I was thinking this would be a simpler common issue. Explains why I didn't find anything on YouTube for it. Grease seemed good to me but I wouldn't know


#8

R

Rivets

On that model the more likely problem is the drive gear on the axle needs to be removed and all parts need to be cleaned. For the inexperienced DIY guy I will say this is not a hard job, but if you’re not very careful and observant, you will find yourself in a quandary when trying to reassemble. I’ve attached two sites which will help you make a decision as to how you would like to proceed. One is the parts manual and the other is the service manual for the different drive systems used by Toro. The transmission used on your unit is SINGLE SPEED BEVEL GEAR TRANSMISSION. I’ve probably serviced over a 250 of these systems and it normally takes me about an hour to do one. I will tell you I keep a paper copy next to me, of the system I’m working on for references, as I’ve made mistakes more than once in reassembling the system. From what I can see, you don’t have to do anything with the tranny, so close it up and just work on the drive axle gears setup.




#9

S

slomo

Grease seemed good to me but I wouldn't know
To my poor eyes, it looked like all the oil is gone from your grease. Looks black and has cut more than a few yards LOL. Not that expensive to change it out.


#10

R

Rivets

Slomo. Do you realize that you most remove the entire axle/tranny assembly to properly do what you are saying? The OP can do what he wants, just saying I wouldn’t worry about it.


#11

S

slomo

Slomo. Do you realize that you most remove the entire axle/tranny assembly to properly do what you are saying? The OP can do what he wants, just saying I wouldn’t worry about it.
Of course. Actually on some Toros I've done, the trans will rotate in a down angle once you remove the belt and I think a wheel or two. Been a while so don't quote me on this. Or just remove it entirely from the deck.

I hear ya Rivets. You like dead grease. It's all good here. (y)


#12

R

Rivets

No I don’t, I just like to only fix problems I see, not what I think might need to be done. My time and experience cost money and I don’t do things that I must charge the customer for if I don’t feel it’s needed.


#13

S

slomo

I sleep better at night knowing a mower of mine has good fluids and is ready for battle. Fins are clean....


#14

sgkent

sgkent

most likely your belt mechanism is screwed up. It slips to allow movement except when the handle is pushed down to engage it. Yours is engaged for whatever reason, too small a belt, broken something, jammed with debris, I dunno. That is how my 20055 Toro recycler works.


#15

R

Rivets

Ok, you guys win, I give up. There’s no arguing with guys who’ve solved the same problem on different mowers or charge for repairs that may no be needed, so they can sleep well. I’m getting out of this one. Juntjoo, PM me if you need more help.


#16

sgkent

sgkent

Rivets, as I understand it, his primary complaint is that the the wheels only turn in the backwards direction unless the engine is on and he is pushing the mower forward. I have a 20055. He has a 20065 which I believe is the next year's model of the same mower. On mine, the belt that drives the wheels must slip in order for the wheels to spin freely in the forward direction or one would be turning the motor. If he monkeyed with the belt, replaced it or has too much debris in there then it will not slip and the wheels will seem locked. As to his grease and lube, his maintenance - that is a seperate issue which I did not address because all you folks already addressed it. On my 20055 when the handle is pushed down to go forwards it causes the belt to grab. The more it is pushed down, the more the belt grabs and the faster the mower goes forward. That mechanism must work freely. He might want to read this:

Adjusting the Self-Propel Drive​

https://manuals.toro.com/128625/index.html#ae4c963c-e6be-4021-bcef-682ac6a388c3


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