5700 Rear derailleur overhaul - worth it?

wolfsbane2k

is it worth overhauling a 5700 rear derailleur, given they are currently £23 each?

Have one that a friend thinks mine is gunked up or bent due to some serious shifting issues, so wanting to exclude the "gunked" option, but have bought a new one to keep the bike going until i manage to check it out.

The park tools website has a "howto" guide - does anyone know if that's still valid?

Ta

gethinceri

It's not difficult and doing it will teach you how to overhaul any rear derailleur. Give it a go, you've only got £23.00 to lose!

Mad_Malx

I'd swap the hanger before the derailleur, usually even cheaper to swap.

wolfsbane2k

Gethinceri wrote:

It's not difficult and doing it will teach you how to overhaul any rear derailleur. Give it a go, you've only got £23.00 to lose!

Good way to look at it.
This one went through a ford last week and got dropped the same day, so could be either

wolfsbane2k

Mad_Malx wrote:

I'd swap the hanger before the derailleur, usually even cheaper to swap.

Checked the alignment, it's A-OK, so not the hangar. Although I do have one in the box of bits.

keef66

Last time I tried to eke a bit more life out of a 5600 rear mech the pulley bolts both rounded off Cost of new pulleys and bolts was more than a new 5700 mech so I bought one of those instead.

It had done 7 years of year round riding, so it wasn't too painful chucking it in the skip

The Rookie

As its now surplus to requirements I'd clean and strip it down and then decide what to do.

Bobbinogs

^^ Sort of. I would strip it down and clean it, reassemble, try and work out what the leftover bits could possibly be for...then decide what to do.

tsarouxaz

first thing to do is check if the problem is on the derailleur or the shifters!! you can check that with any 9sp mtb or road or or any 10sp road (except tiagra 4700 series) derailleur. If it goes ok by trying a derailleur that you know it works on your friends bike (yes, that is where you will find it ,haha), then your 105 derailleur either needs cleaning or the metal pins and bushings that hold the parallelogram in place are worn. If they are worn, you loose the exact parallelogram that is required for keeping the shifting ratio and cable pull and there is no overhaul you can do there. just buy a new one. do whatever the shimano dealers manual tel you that you can overhaul and if the problem persists, THROW IT AWAY and buy a new one. also do a check on the condition of the cassette sprockets if they are worn (there is a method of figuring that out on the shimano dealers manuals).

The Rookie

To be honest, in 90% of cases the dérailleur problem is just knackered jockey wheel bearings!

wolfsbane2k

Cheers.
I swapped the "bent" RD over to the new one and the problem was lessened, but not removed, so thinking cables have lost oil & the RD isn't working properly, but I really think it's crud in the mech ( bi-daily 5 cm deep ford crossing...)
Plan to strip it down, clean and rebuild over xmas to return it to the spares box..

Hoping the 10 days over xmas will mean I get a few hours to sort out the cabling issue 2.

Matthewfalle

Smash it with a hammer, throw it into next door's garden and spend the hour or so you would have spent tinkering with it drinking ale, eating pork scratching and researching the blonde bird from Countryfile off the "embarrassing crushes" thread in Cake Stop.