gearbox

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peter holst
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gearbox

Post by peter holst »

I have to learn how to service/change gears in my hewland F3 box. some kind of manual with some pictures would helo a lot :)
anybody knows where I can find it?

RedRedWine
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Re: gearbox

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Tony Cotton
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tristancliffe
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Re: gearbox

Post by tristancliffe »

Although in club racing you'll probably get away with changing one dog ring every other season. Anything more means you're doing it wrong. A ratio pair will on average last 4 or 5 years or more, unless you change gear badly in which case you can damage them quite quickly. Much cheaper (and faster) to learn how to change gear.

Torque the big castle nuts. Without a torque wrench you will undertighten (allowing some relative movement between components) or overtighten (causing damage to threads at the very least).

Statistically, more accidents happen because of overtightening. Especially when a nut/bolt check involves stupidly tightening a nut by 1/10th of a turn each time "to make sure".
Tristan Cliffe - MSV F3 Cup - Dallara F307 Image
Monoposto Champion 2008, 2010 & 2011 with a Reynard 883 and a Dallara F398, and F3 Cup and Team Champion 2012

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Re: gearbox

Post by jimblockley »

Here,s one for Kevan, no doubt will produce suitable rude response.
I bought a box of mk9 series 5 gears from a f3 team in 1988, most are still going strong and not showing any signs of cracking at the base of the teeth, where they tend to go before breaking.
In fact one of the few failures i have had over the years was a brand new second gear bought from a hewland agent

peter holst
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Re: gearbox

Post by peter holst »

Thanks all of you - very helpfull :)

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Re: gearbox

Post by RedRedWine »

http://www.startline.org.uk/slol65/gears/gears.htm

Some of the comments refer to gear changes. The above is William Hewland's take on it.

BTW if you need to use the clutch to change up something's wrong.
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Re: gearbox

Post by tristancliffe »

RedRedWine wrote:http://www.startline.org.uk/slol65/gears/gears.htm

Some of the comments refer to gear changes. The above is William Hewland's take on it.

BTW if you need to use the clutch to change up something's wrong.
And if you need the clutch on downshifts (in a Dallara), something's wrong.
Tristan Cliffe - MSV F3 Cup - Dallara F307 Image
Monoposto Champion 2008, 2010 & 2011 with a Reynard 883 and a Dallara F398, and F3 Cup and Team Champion 2012

peter holst
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Re: gearbox

Post by peter holst »

4 Peter book a flight to Gatwick airport for next week and you can be taught how to change ratios and you can do them in my 2 F3 cars[/quote]

Would be great - could buy som ratios at the same time :D but I have to word to pay for all the ekstr gear I need to buy :?

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Re: gearbox

Post by lee »

Only ever had one ratio broke in 7 1/2 seasons racing. Never changed a dog ring. Obviously not trying hard enough
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peter holst
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Re: gearbox

Post by peter holst »

I did it :D
No problem but one ratio broken and a dog ring had signs of wear :(
Makes me think I better tjek the gearbox all over.

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Re: gearbox

Post by peter holst »

tjek your mailbox :)

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