Cougar KC gear diff case screws

[cjm_2008]

Hi,

I'm in the process of converting my KD to KC spec & I'm stuck with a gear diff that won't seal.

Despite using a good quality hex head & making sure the internal gears were seated properly, the hexes in the screws have rounded off! Very annoying. I can't tighten them to seal it up now.

I really don't fancy buying a whole new diff, but I can't see a way of getting the screws out (made of cheese?!).

Did anyone else have this issue?

[ianjoyner]

The screws are a little stiff to thread, but I haven't had any trouble with the heads stripping.

Here's a good guide to building the gear diff, a little black grease helps a lot to prevent any leakage:

http://site.petitrc.com/setup/schumacher/setupcatk1/K1Aero_TonyNewland_GearDiffBuild/

[cjm_2008]

The screws are a little stiff to thread, but I haven't had any trouble with the heads stripping.

Here's a good guide to building the gear diff, a little black grease helps a lot to prevent any leakage:

http://site.petitrc.com/setup/schumacher/setupcatk1/K1Aero_TonyNewland_GearDiffBuild/

:thumbsup: ta.

[mark christopher]

Never stripped the screws, were you using a good quality driver?

[cjm_2008]

Never stripped the screws, were you using a good quality driver?

An EDS bit. Very snug in the hex - but as soon as torque was applied the hex itself began to round off.

[J77MYF]

Hi,

I'm in the process of converting my KD to KC spec & I'm stuck with a gear diff that won't seal.

Despite using a good quality hex head & making sure the internal gears were seated properly, the hexes in the screws have rounded off! Very annoying. I can't tighten them to seal it up now.

I really don't fancy buying a whole new diff, but I can't see a way of getting the screws out (made of cheese?!).

Did anyone else have this issue?

One of mine did exactly the same when I built my kit from new the other week. If you are careful you should be able to put a line across the damaged heads with a Dremel and then use a flat bladed screwdriver to get them out. I replaced all of mine with new screws which then allowed it to tighten up properly. I bought 10 of these in size M2.5 x 10mm which are exactly the same size and colour as the originals:

http://www.ebay.co.uk/itm/M2-M2-5-M3-M4-Metric-Socket-Countersunk-Screws-A2-Stainless-Bolt-CSK-Allen-/292201194563?var=&hash=item44088c6443:m:mE5glsyDjOJbIxPQ2q2uJ5w

Hope this helps :thumbsup:

[cjm_2008]

One of mine did exactly the same when I built my kit from new the other week. If you are careful you should be able to put a line across the damaged heads with a Dremel and then use a flat bladed screwdriver to get them out. I replaced all of mine with new screws which then allowed it to tighten up properly. I bought 10 of these in size M2.5 x 10mm which are exactly the same size and colour as the originals:

http://www.ebay.co.uk/itm/M2-M2-5-M3-M4-Metric-Socket-Countersunk-Screws-A2-Stainless-Bolt-CSK-Allen-/292201194563?var=&hash=item44088c6443:m:mE5glsyDjOJbIxPQ2q2uJ5w

Hope this helps :thumbsup:

Massive help mate, ta. I just ordered a new gear diff and a set of those screws :thumbsup::thumbsup: