Basics Steps For WR400F Water Pump Rebuild
Posted April 16, 2008 - 08:13 AM
Check shaft for grooves and replace if necessary, mine only had cosmetic blemishes and looked bad until I cleaned it up with emery cloth (and this was after 9 years of significant use) Check bearing and replace if needed; mine was good.
Press in new seals using a socket if needed, make sure to grease the lips, tap in the bearing with socket.
Reverse the removal steps, make sure the pump shaft is aligned with the slot when installing the side cover.
Posted April 16, 2008 - 10:11 AM
Thank for the info. I am just about ready to tackle a water pump replacement on my 426. This surely helps.
Posted June 22, 2012 - 09:00 PM
My WR400f started leaking water badly. I changed the water pump seal and as the pump shaft was in good condition did not repalce.
It leaked just as bad.
On reading the information on the forum I realised the guy who owned it before me had fitted the seal back to front.
I refitted it new seal correctly and no issues.
reading this forum saved me replacing pump shaft and a lot more money and still have the problem