Any gearbox experts?

[Pete.]

Am I the only one here that would give that collar a gentle tap left/right with a brass drift and hammer

Bob

Nope

Looks like a giant cone clutch. I'd warm it up a bit and hit it with a soft drift.

 

[JMS1972]

Thanks for all the ideas. After a soak with WD40 overnight I gave it a tap with a lump hammer using a bit of copper bar as a drift.

Freed up first tap.

Looks like it needs slight sideways pressure to keep engaged which explains the spring loaded vee shaped detent. So probably a cone clutch on each side top marks @Pete.

I'll give it a good soak in diesel and then put some gear oil in it.

So the old adage Don't force it, use a bigger hammer was correct in this case.

 

[JMS1972]

Bit more progress in the two speed gearbox.

It's had a soak in diesel. Fair amount of grot came out and a few filings but no big lumps.

I then started looking at the input side pulleys as it was running anyway but true.

Retaining nut came off with a bit of help from a drift. The uneven ring intrigued me I thought it might be cork.

Nope it's proper friction material! so some sort of clutch?

Sleeve was a pig to remove, multiple beatings and the puller got it shifting.

Part of the issue was the key had twisted and jammed, or fretted into a weird shape.

The sleeve bore had worn and allowed it all to twist.

Not sure if I need the clutch. Is it to protect the gearbox in the event of a jam? Should it be spring loaded can't see the jam nut offering very sensitive adjustment.

 

[dobbslc]

I have no idea what they use but could that friction material be asbestos?

 

[Agroshield]

...so some sort of clutch?

...Is it to protect the gearbox in the event of a jam? Should it be spring loaded can't see the jam nut offering very sensitive adjustment.

Yes, it is an overload clutch. Yes, it is to protect the gearbox. No, it does not need a spring. The jam nut is adequate: that is why it has a grub screw in it so you can lock its position. On reassembly, drop a slug of copper into the hole before the grubscrew to protect the threads on the shaft. It could be cork rather than asbestos.

 

[JMS1972]

I have no idea what they use but could that friction material be asbestos?

Almost certainly it's pretty old. I realized it wasn't cork once it was in bits

 

[JMS1972]

Yes, it is an overload clutch. Yes, it is to protect the gearbox. No, it does not need a spring. The jam nut is adequate: that is why it has a grub screw in it so you can lock its position. On reassembly, drop a slug of copper into the hole before the grubscrew to protect the threads on the shaft. It could be cork rather than asbestos.

I think there is something in there already to protect the threads.

 

[JMS1972]

Had some time today so made some new gaskets for the gearbox front cover and end plates.

The tools for the job mainly use the little ball pen.

Castings are a bit rough on the inside, but a clean enough cut. Bolts locate the gasket.

Tidy up the outside.

Side plates I used magnets as well as the bolts.

These had a smoother edge so quite a nice clean cut.

Gaskets were treated to a thin smear of grease and everything buttoned up.

 

[James1979]

Had some time today so made some new gaskets for the gearbox front cover and end plates.

View attachment 318595
The tools for the job mainly use the little ball pen.

View attachment 318596
Castings are a bit rough on the inside, but a clean enough cut. Bolts locate the gasket.

View attachment 318597
Tidy up the outside.

View attachment 318598
Side plates I used magnets as well as the bolts.
View attachment 318599
These had a smoother edge so quite a nice clean cut.
View attachment 318600
Gaskets were treated to a thin smear of grease and everything buttoned up.

That’s posh. Greased weetabix box here

 

[JMS1972]

That’s posh. Greased weetabix box here

Blimey you can afford Weetabix? I have to make do with Lidl's own brand

 

[James1979]

Blimey you can afford Weetabix? I have to make do with Lidl's own brand

I have an ever decreasing supply of nautical charts. They make the best gaskets.

Yes weetabix. Somethings I will scrimp on. Weetabix is not one

 

[JMS1972]

Its the gear selector which engages in the groove.

I think @Blobber was talking about the vent. Which is a right angled fitting with some sort of spring loaded valve in it.

 

[Mikes]

I have an ever decreasing supply of nautical charts. They make the best gaskets.

Yes weetabix. Somethings I will scrimp on. Weetabix is not one

Better buy them whilst you can as engineers strike at their plants is hitting production apparently.

 

[JMS1972]

Finished the Exacta R.O. gearbox today. Filled up with oil. I need to remanufacture part of the overload clutch at some point but I'm shelving this project for the time being as my energy levels are at rock bottom.

Paint is not up to @Pete. Standard (or colour )

I'm guessing it will be okay with Hypoid. Cup at front shows level. Possibly overfilled slightly as some was leaking from shaft but that may be a feature as there are no seals.

Brass vent valve replaced.

I adjusted the change detent it seems pretty positive now.

 

[Seadog]

Be careful about oil selection. Some hypoids eat yellow metal.

 

[JMS1972]

Be careful about oil selection. Some hypoids eat yellow metal.

The old oil smelt like Hypoid. But the only non ferrous in it is the bronze change dog which is above the resting oil level.

 

[minimutly]

Good job, well done!

 

[mcostello]

Well, for a Gal You seem pretty handy, You did good.

 

[mcostello]

All most all the Gals I know over here would not get closer than 3 feet away for fear of getting dirty. She jumped right in to it AND fixed it. Ain't deny anything, I did not mean it that way and if You don't like it, that's Your problem.

 

[mcostello]

I know of the history of Women in the wars, An Aunt was a part inspector for a munitions plant during WW2. Cannot find out anything else. Over here there is no manual lifting limit change for Women, no slack for Gender, that I have ever heard of. Men in Womans bathrooms coming, I disapprove. Was not meant as a dig against Girls, I was (I thought) telling Her what a good job She did. I know several Gals in traditional Men's jobs and they do a good job, just none are willing to tear into machine repair. Did not intend to stir up the hive.