61 bc 170 allwheel drive master cylinder cap needed

[joninVA]

I lost the cap for my master cylinder. it was plastic. this master cylinder is one of the wider ones, if that makes any difference. my 72 1600 has a more narrow master cyl with a metal cap. anybody have one on a junk truck they would sell? also if i ever need front axle or transfer case parts where would i look? would like to find a junk truck with the same axles, and maybe a 5 speed to go behind the bd-308 6 cyl.

[george goldie]

I too need a cap , mine is a 68 1600 cab and chassis, and the cap is stripped and when i pump the brakes it burps fluid back out the master cylinder? I also suspect the vacuum booster maybe a related to this problem.
george goldie

[joninVA]

air in the system will cause more of a 'burp back'. if you still have the cap you can put two large radiator caps together, put them all the way around the master cylinder, and tighten them down over the cap.