Unofficial Royal Enfield Community Forum

Royal Enfield Motorcycles => Vintage Royal Enfield => Topic started by: High On Octane on May 08, 2013, 07:10:26 am

Title: Replacing Crank Seal On 700 Twin
Post by: High On Octane on May 08, 2013, 07:10:26 am
I have a bad oil leak between the primary case and the engine block where the crank is.  Is it the chain case oil seals that I need to replace?  Also, can I install them with out disassembling the motor?  I need to replace the alternator and was thinking of just replacing those seals while I was in there and had it tore apart.

Scottie
Title: Re: Replacing Crank Seal On 700 Twin
Post by: ERC on May 08, 2013, 02:15:51 pm
Yes you can replace the seal on the inner primary. Depending which primary is on the motor the later ones are a rubber seal the early ones are felt. there is also a seal for the gearbox shaft, can be eithe rubber or felt. If it's felt you can put a bullet 4 speed rubber one on that shaft. You don't need to disassemble the motor.   ERC
Title: Re: Replacing Crank Seal On 700 Twin
Post by: High On Octane on May 08, 2013, 02:22:56 pm
Thanks ERC.  From looking at Hitchcocks, it seems like I have the multi-piece felt seal set.  I believe the transmission shaft seal is rubber though.  Either way, they're cheap and easy to replace. 

Scottie
Title: Re: Replacing Crank Seal On 700 Twin
Post by: ERC on May 08, 2013, 03:40:37 pm
Don't order anything till you pull it apart, you never know what inner primary you may have on there. the bikes old and may have been changed to a later or earlier one. They all bolt on the same basically.  ERC
Title: Re: Replacing Crank Seal On 700 Twin
Post by: High On Octane on May 08, 2013, 04:26:15 pm
Eff that crap.  I'll order both and send back what I don't need.  That's too much down time.  I want to ride now damn it!  LOL  Actually it's going to rain all today.  Bummer, I wanted to try out the new GPS speedometer app I downloaded for my phone.

Scottie
Title: Re: Replacing Crank Seal On 700 Twin
Post by: ERC on May 08, 2013, 04:54:01 pm
I may have both types at home I'll check, the shipping would be cheaper.  ERC
Title: Re: Replacing Crank Seal On 700 Twin
Post by: ERC on May 08, 2013, 05:55:09 pm
I've got the big and small felt ones, no rubber ones.  ERC