Originally Posted by
CARS II
After taking about a week off from working on the KC, I'm back at it, I hope I can make some progress with this refurbish, it was going all good in the begining but then, I been finding a few things that are in need of fixing ( temp prob, retract valve, rudder servo working erratically and so on )
I now have one of the new jetronics valves with fail safe build in for the gear, I'll give that a chance to change my mind about these valves, I also have a new temp prob, that fortunally and unfortunately I won't be using, last night I swapped the probs and got the same error massage ( --E-- ) then now I knew that the cable and prob are good soooo, I swapped the probs again, then I started pushing and pulling around the comm Jack on the the turbine, next thing I know I was getting temp info on the GSU, I finally figure out that the cable is loose on the turbine's comm Jack, well, that problem, mystery is solved, the fix it's easy, I will be able to run the engine by Friday
Cars,
Your retract valve may not be bad. Just went through this issue with the one I did.
So I have it at my house and the damn thing holds air for two days straight, give it back to the owner and it leaks like crazy. So we test it at the field it holds air...we fly, no gear, get it down valve is leaking. I take it home and replace it with another BVM valve. It leaks at first but then it is holding air, then it is leaking again. So I change out the fill valves thinking I have a leak there and the leak stops. Give it back to my friend he takes it home and it starts leaking again. So we call BVM and ask one of the techs about a leaky retract valve...immediately he responds.."Is this on a kingcat?" Long story short it's a common problem with kingcats. Its not the valve its one of the gear. You fill up the air tank and the air goes to the gear....if an O-Ring in the gear is bad it will let air pass and the air has to go somewhere so it escapes back out through the valve. Hence you think your valve is bad. it was one of his mains...he replaced that main with a spare he had and no more leaks. You can put oil in the retract and see if that helps, but he did say that if it sat for along time and the o-ring drys out replacement is usually the best policy (o-ring replacment that is). Text me if you have questions.
Patrick