1949 WL - Oil Pump Questions

All flathead topics
Post Reply
Pascal
Senior Member
Posts: 580
Joined: Wed Aug 13, 2014 8:27 pm
Bikes: WLA
Has thanked: 58 times
Been thanked: 145 times

Re: 1949 WL - Oil Pump Questions

#16

Post by Pascal »

As can be seen from the photo, the pin/ wedged plate sits under the ballvalve.
I'm interested how that pin can prevent a ball from doing anything at all...
Top
Frankenstein
Senior Member
Posts: 752
Joined: Wed Oct 05, 2005 9:04 am
Bikes: 37ULH,46UL,47EL(80"),65FL,61KH-WL-BSA hybrid,56square4,several 50's BSA 500 singles
Location: Interlaken, NY
Has thanked: 22 times
Been thanked: 320 times

Re: 1949 WL - Oil Pump Questions

#17

Post by Frankenstein »

The pin prevents the anti sump check valve from blocking the relief port when oil flows, and the plate prevents the pressure relief ball from blocking the port that allows pressure reliefed oil to vent to the passage to the cam chest. Lots going on inside that pump.
DD
Top
Post Reply

Return to “Flathead and Servi-Car”