P38A Front propshaft gearbox end

kapilamuni · Jun 8, 2016

[QUOTE="jamesmartin, post: 3760281, member: 55036"...................... but it is std practice to change seals on complete units[/QUOTE]
From the drawing in RAVE , the shaft has a square section just out side the g/box. To replace the o-ring I will have to expand it over that square section. I have a doubt that it might not get back to its original level or create alignment issues.

regds

wammers · Jun 8, 2016

kapilamuni said:
[QUOTE="jamesmartin, post: 3760281, member: 55036"...................... but it is std practice to change seals on complete units

From the drawing in RAVE , the shaft has a square section just out side the g/box. To replace the o-ring I will have to expand it over that square section. I have a doubt that it might not get back to its original level or create alignment issues.

regds[/QUOTE]

Should be reasonably simple to tease the O'ring over the cleaned up square section using silicone grease as a lubricant and insert it. Or wrap square section with a little electrical tape then grease it and O'ring and slide into place then remove tape.

kapilamuni · Jun 8, 2016

This is the seal.

Since it's wide and not really a o-ring, can I expand it like that?

tomcat59alan · Jun 8, 2016

kapilamuni said:
This is the seal.View attachment 101939
Since it's wide and not really a o-ring, can I expand it like that?

Try it, what have you got to lose? make it three weeks and Wammers and I will cure all your problems.

And some you didn't know you had.

wammers · Jun 8, 2016

kapilamuni said:
This is the seal.View attachment 101939
Since it's wide and not really a o-ring, can I expand it like that?

That is an oil seal not an O'ring tape and lube method should work for that.

Grrrrrr · Jun 8, 2016

I hope we're still taking about cars ...

wammers · Jun 8, 2016

Grrrrrr said:
I hope we're still taking about cars ...

Whatever else?

kapilamuni · Jun 10, 2016

Yeah, what else?

Grrrrrr · Jun 10, 2016

Ask Tomcat.

tomcat59alan · Jun 10, 2016

kapilamuni said:
Yeah, what else?

Don't get your hopes up, the airline tickets havn't arrived.

Grrrrrr · Jun 10, 2016

tomcat59alan said:
Don't get your hopes up, the airline tickets havn't arrived.

You're travelling Air Sri Lanka so there's a good chance the plane won't either.

tomcat59alan · Jun 10, 2016

Grrrrrr said:
You're travelling Air Sri Lanka so there's a good chance the plane won't either.

We would be ok, wammers would whip his wallet out and we would have a soft landing.

wammers · Jun 10, 2016

tomcat59alan said:
We would be ok, wammers would whip his wallet out and we would have a soft landing.

Do you mind if we wait until i win the lottery then? I can't see a few old ten bob and pound notes having much of a cushioning effect.

Grrrrrr · Jun 10, 2016

wammers said:
Do you mind if we wait until i win the lottery then? I can't see a few old ten bob and pound notes having much of a cushioning effect.

Take your mattress as hand-luggage.

spadgr · Jun 10, 2016

I doubt the width of the square section is any bigger than the diameter of the selector shaft where the seal sits, so it should just slide over.

wammers · Jun 10, 2016

spadgr said:
I doubt the width of the square section is any bigger than the diameter of the selector shaft where the seal sits, so it should just slide over.

It's the sharp edges of the machining where the shaft changes shape from square to round that is the problem. A bit of electrical tape over that and silicone grease will sort that.

kapilamuni · Jun 10, 2016

From the looks of it,the shaft diameter is about 15mm but the square section is about 2-3mm more at the 4 corners.
Roughly, about 19mm in diameter, I guess.

wammers · Jun 10, 2016

kapilamuni said:
From the looks of it,the shaft diameter is about 15mm but the square section is about 2-3mm more at the 4 corners.
Roughly, about 19mm in diameter, I guess.

In RAVE seal replacement involves removing sump and valve block. Then removing selector shaft fitting seal and replacing shaft, so you are correct, outer section is larger than shaft diameter. So a lot bigger job than at first thought.

spadgr · Jun 10, 2016

Manufacturers do like to make things more difficult than they should be. Fitting tape around the square section will increase the overall diameter which is already considerably (%20 according to your previous post) greater than the actual shaft size, i would probably lube up with lashings of rubber grease and carefully fit the seal and rotate the seal whilst sliding over the square section. Doing so will reduce the risk of cutting the critical sealing face of the seal.

tarphenry · Jun 10, 2016

How about a plastic sleeve,to safguard the seal with plenty of grease

P38A Front propshaft gearbox end

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