Gearbox woes
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- ndevans
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Re: Gearbox woes
Ok good folks, next installment in the saga.
The engine is stripped and ready to go for the rebore, so time to get the gearbox out. I've managed to get the gearbox cover off, for the first time ever, or at least since about 1988.
Next question-do I remove the gearbox through the engine bay, or through the passenger compartment?
Cheers N
The engine is stripped and ready to go for the rebore, so time to get the gearbox out. I've managed to get the gearbox cover off, for the first time ever, or at least since about 1988.
Next question-do I remove the gearbox through the engine bay, or through the passenger compartment?
Cheers N
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Re: Gearbox woes
You can remove the gearbox downwards and rearwards and exit under the car.
As you have removed the engine - remove the gearbox forwards into the engine bay and exit the car.
As you have removed the engine - remove the gearbox forwards into the engine bay and exit the car.
- ndevans
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Re: Gearbox woes
Ok thanks. I thought so, looks a pain to go through the passenger compartment! I will take it out through the engine bay, the engine is already out.
On a related note, is it easier to get the engine & gearbox back in as one, or gearbox first, then engine?
Cheers N
On a related note, is it easier to get the engine & gearbox back in as one, or gearbox first, then engine?
Cheers N
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Re: Gearbox woes
I cannot think of any good reason for not assembling engine to gearbox, “in free air”, before refitting the one unit into the car - unless your lifting tackle is inappropriate.
Re: Gearbox woes
Whilst it saves the job of clutch shaft alignment, installation of the combined assembly will involve the extra work of dismantling the front radiator panel, with the inherent danger of the threaded trim fixings breaking off, if the front is not already off, think twice about disturbing it.
- ndevans
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Re: Gearbox woes
Thanks, good point, but the radiator and front panel are already out!les wrote: ↑Fri Mar 08, 2019 1:55 pm Whilst it saves the job of clutch shaft alignment, installation of the combined assembly will involve the extra work of dismantling the front radiator panel, with the inherent danger of the threaded trim fixings breaking off, if the front is not already off, think twice about disturbing it.
Cheers N
- ndevans
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Re: Gearbox woes
Nearly there, just got to remove the gearbox cross member, but I need to move the car to get at it properly.
Got to remove the speedo cable-how do I do that? Is it just the aluminium knurled end cap that I remove, or the plastic insert that screws into the gearbox? When I remove the aluminium cap, the cable won't come out.
Cheers N
Got to remove the speedo cable-how do I do that? Is it just the aluminium knurled end cap that I remove, or the plastic insert that screws into the gearbox? When I remove the aluminium cap, the cable won't come out.
Cheers N
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Re: Gearbox woes
Once the knurled cap is unscrewed the inner cable *should* just pull out. However, it is not unknown for it to be stuck with dirt/rust etc. Try spraying it with releasing fluid and later try patiently wiggling/pulling on the cable. If that fails, you may have to unscrew the plastic part. Oil may then leak out unless you have already drained the box.
- ndevans
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Re: Gearbox woes
Ok thanks. Haven't changed it since 1990! *Touches wood*
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Re: Gearbox woes
With reference to the very helpful moss diagram posted by Phil the Hill where does the pedal return spring, item 40 attach ? It seems to be missing from my 1960 car. The clutch arm spring, item 77 is in place, but isn't strong enough to pull the pedal up against the floor. Cheers John G
- ndevans
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Re: Gearbox woes
The clutch return spring attaches to the engine backplate, there is a hole drilled for it.johngrigg wrote: ↑Sat Mar 09, 2019 11:46 pm With reference to the very helpful moss diagram posted by Phil the Hill where does the pedal return spring, item 40 attach ? It seems to be missing from my 1960 car. The clutch arm spring, item 77 is in place, but isn't strong enough to pull the pedal up against the floor. Cheers John G
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Re: Gearbox woes
Extract from the BMC Workshop Manual shows how the clutch pedal return spring is fitted.
It's a strong spring, so be careful when fitting it!Richard
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Re: Gearbox woes
Thanks Neil and Richard. As I said in my post that spring which I perhaps wrongly called the 'clutch arm spring' is all present and correct. What I was asking about is the additional spring1G5999 mentioned by Phil the Hill and shown as item 40 on the link he posted. It may possibly be the brake pedal return spring and if I could open his link I might be able to confirm this.
Cheers
John G
Cheers
John G
- ndevans
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Re: Gearbox woes
Ah, I see.
I *think* it's the clutch pedal return for 803 & 948 cc cars, which explains why I haven't got one. Not sure where it fits.
I *think* it's the clutch pedal return for 803 & 948 cc cars, which explains why I haven't got one. Not sure where it fits.
- ndevans
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Re: Gearbox woes
This diagram from the BMC Workshop Manual shows the part you are referring to as item 45. It fits, far as I can see, between item 46 and item 37.
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Re: Gearbox woes
Its a bit confusing as the Moss diagramme of clutch parts that Phil evidenced refers to item 40 as a 'pedal return spring' and then gives two types - one for 803/948 models, and then another spring for 1098 models.
However, the brake pedal return spring is given a different part number (AAA599) to the clutch springs in the illustrations for the brake system components: https://www.moss-europe.co.uk/shop-by-m ... minor.html It is more expensive than either of the two clutch return springs listed so must be different. As far as I am aware, the other end of the brake pedal return spring is attached to a tab inside the chassis leg.
However, the brake pedal return spring is given a different part number (AAA599) to the clutch springs in the illustrations for the brake system components: https://www.moss-europe.co.uk/shop-by-m ... minor.html It is more expensive than either of the two clutch return springs listed so must be different. As far as I am aware, the other end of the brake pedal return spring is attached to a tab inside the chassis leg.
- ndevans
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Re: Gearbox woes
You might be right about the tab inside the chassis leg. I have a 1098, so mine is the latter version, attaching to the engine backplate.
I wonder if Moss have got their diagram wrong, as the diagram I posted above is out of the BMC Workshop Manual, and is in the section for a Series MM.
I wonder if Moss have got their diagram wrong, as the diagram I posted above is out of the BMC Workshop Manual, and is in the section for a Series MM.
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Re: Gearbox woes
"I have a 1098, so mine is the latter version, attaching to the engine backplate."
That can't be right, because the clutch fork return spring (item 77) is the one which attaches to the engine backplate and is clearly different to the pedal return springs listed for both the 803/948 and the 1098 models (item 40). I can confirm my 948 engine/gearbox has the clutch fork return spring, attached to the engine backplate, but whether it also has a pedal return spring somewhere I have no idea.........
That can't be right, because the clutch fork return spring (item 77) is the one which attaches to the engine backplate and is clearly different to the pedal return springs listed for both the 803/948 and the 1098 models (item 40). I can confirm my 948 engine/gearbox has the clutch fork return spring, attached to the engine backplate, but whether it also has a pedal return spring somewhere I have no idea.........
- ndevans
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Re: Gearbox woes
My clutch return spring definitely attaches to the backplate. Can't take a photo, it's in bit at the moment.
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Re: Gearbox woes
Yes, but that is the clutch fork spring (what 'johngrigg' refers to as the 'clutch arm spring'). John's query is about the pedal return spring, which is seemingly a different thing, according to Moss in their diagramme.........I said it was confusing!