Wanted. A replacement master cylinder filler cap/plug for an M416A1 trailer (this is the trailer with the hydraulic over-ride brake system).
At the weekend I decided it was time to check the brake fluid level even though the trailer hasn't been used for two years. Unfortunately, the cap is aluminum and it had reacted with the threaded casting. Despite a good soaking in penetrating fluid and gentle heating, it took a hammer and chisel to eventually unscrew the cap.
There are two types of cap...this one (pictured) and a replacement dome-shaped steel cap. Either will be fine as replacements.
The part numbers etc are:-
alloy cap - (old version) 2530-00-862-6822
steel cap (new version) 2530-01-131-7527
If you have either type for sale, please let me know.... if you know anyone who might have one, I'd appreciate any help.
PS although the original type looks identical to the mutt master cylinder cap, this one is bigger. The threaded area of the cap is one-and-a-half inch in diameter.
![Image](http://www.surfacezero.com/g503/data/500/medium/Old_filler_cap.jpg)
diameter.
Thanks
Ken