Rebuilding Deck Gearbox RCK54-23ZG

[N3BP]

I used my part's washer when I rebuilt mine. Trichloroethane (had to take a pic of the bottle, haha) is also great stuff, just don't breath it in, or get it on your skin!

It wasn't mentioned yet, but make sure your backlash is in spec after reassembly. The factory does a good job with shimming, so you should be good. But it still needs to be checked.

 

[MartyJones]

I used my part's washer when I rebuilt mine. Trichloroethane (had to take a pic of the bottle, haha) is also great stuff, just don't breath it in, or get it on your skin!

It wasn't mentioned yet, but make sure your backlash is in spec after reassembly. The factory does a good job with shimming, so you should be good. But it still needs to be checked.

Can you elaborate on “backlash”? I am a noob to rebuilding this gearbox.

 

[JimDeL]

It's what I use, as it'll 'flush out' the residue.
I used to use trichloroethelyene ??? Some big,long mouthful of letters. would get 45g drums of it for free (used coolant for SCR motor drives ). It worked GREAT at cleaning carbs and trannies and such.....
probably banned now of course.....

Yeah, it's banned for being hazardous to the Ozone layer, as well as for being a potential carcinogen. It was good stuff for degreasing, though.

 

[Russell King]

Can you elaborate on “backlash”? I am a noob to rebuilding this gearbox.

When gears mesh together there is some movement possible between the gears. That is backlash.
Moving the gears closer will reduce the movement but too close and they will be damaged or worn faster.

So there is a process of adjusting the position of gears so they run together well. Usually with shims.

 

[MartyJones]

When gears mesh together there is some movement possible between the gears. That is backlash.
Moving the gears closer will reduce the movement but too close and they will be damaged or worn faster.

So there is a process of adjusting the position of gears so they run together well. Usually with shims.

interesting. I noticed they have the same part (shim) listed in the parts diagram and the only difference is one is .2mm and one is .3mm. I will have to take my caliper out to see which one was in the gearbox originally. I guess they may have changed which one to use over time.

 

[MartyJones]

Well I cleaned up everything and now see one of the shafts teeth are pretty worn down. I will need to replace it as well



What mine looks and what it should look like

 

[Russell King]

interesting. I noticed they have the same part (shim) listed in the parts diagram and the only difference is one is .2mm and one is .3mm. I will have to take my caliper out to see which one was in the gearbox originally. I guess they may have changed which one to use over time.

Probably not just one or the other shim …
No shims = 0 mm shimmed space
1 of the .2mm shims = .2 mm shimmed space
1 of the .3mm shims = .3 mm shimmed space
2 of the .2mm shims = .4 mm shimmed space
1 of the .2mm shims plus 1 of the .3mm shims = .5 mm shimmed space
And so on…as needed

Probably drawings are set up for at least one shim to be required when the tolerances are at the smallest gap possible.

 

[MartyJones]

Probably not just one or the other shim …
No shims = 0 mm shimmed space
1 of the .2mm shims = .2 mm shimmed space
1 of the .3mm shims = .3 mm shimmed space
2 of the .2mm shims = .4 mm shimmed space
1 of the .2mm shims plus 1 of the .3mm shims = .5 mm shimmed space
And so on…as needed

Probably drawings are set up for at least one shim to be required when the tolerances are at the smallest gap possible.

That makes sense.