Looking for some help on service brakes (drum) on my Clark 664B, picked machine up in June of this year, brakes have been troubling machine from the start, finally had enough of pulling E-brake, or reversing direction of travel to stop. Started tearing things apart to fix the service brake, I've decided to pull the trigger and just start at the top and replace everything, so all has gone as planned except new shoes, new wheel cylinder, new hose, but nobody in the area has been able to cross the master cylinder, so I am looking for information on a Lockheed/ Wagner master cylinder, the cap has F1 2103 inscribed on it and the master itself has ether FE 2539 best guess or 2639
(https://forestryforum.com/gallery/albums/userpics/57093/image~4.jpeg?easyrotate_cache=1570153210)
(https://forestryforum.com/gallery/albums/userpics/57093/image~3.jpeg?easyrotate_cache=1570153210)
Just for giggles you might try Allied Systems they were the last ones that made the Ranger line.
I just replaced my master and got the part thru O'Reilly. Mine is a front mount FE1051 were yours is side mount. It referenced to 10-21050. Try them and maybe if they have good counter help they will cross reference it for you.
You can also try Timberparts in New Brunswick. They mail parts out. They are great to deal with on the telephone. Web search should bring their link up. I just bought a new master cylinder for 1978 TJ230E from them. Mountain.
Rock auto part # lookup has nothing close. If wagner techline cant help you [1.800.325.8886] then toss it and rig up a more common automotive based master. Its just a foot actuated hydraulic clamp, super easy. Use a SMALLER piston over a larger one since u arent power assist. Big pistons mean leg pressing the pedal. You want small piston and room for a long stroke. Thatll give you easy pedal input and good clamping pressure. Id take that one apart for measurements on bore x stroke then shop around.
Old isuzu npr may be a good candidate for a master.. I dont recall them having a booster and they had drum rears, good easy brakes on those trucks.. You can tee both ports for full volume btw.
I sent you a PM with a Napa# hope this helps.
I got my master cylinder rebuilt with a stainless liner at a brake shop. And found a new wheel cylinder on summit racing by the casting number.
Stefan
I have bought both repair kits and complete master cylinders from " Brake products Inc, chagrin falls Oh. 440-543-7962" Wicked nice guy to deal with, had the parts, and sent them right out. The ones for my 530 dresser loaders look the same , but have casting # f 8450