R44 Valve Sb

[BRZRKR]

Every time I do this I get way different numbers every time. I've also noticed the lock tabs on the back of the push-pull tube shrouds are no longer joined and try to drop into the abyss. Does every body else end up pulling these when a lifter locks up? I need every tip and trick out there.

[DLC]

Every time I do this I get way different numbers every time. I've also noticed the lock tabs on the back of the push-pull tube shrouds are no longer joined and try to drop into the abyss. Does every body else end up pulling these when a lifter locks up? I need every tip and trick out there.

If your using Aeroshell W65 or W80 than you will not have a problem with Sticking Valves. DO NOT use Aeroshell W15W50 or Phillips 20W50 or you will have sticking Valves or Worse. Need better info on the lock tabs you speak of. As for different numbers, as long as you have some play and the valve move freely after the springs are removed you should be alright.

[thruthefence]

If your using Aeroshell W65 or W80 than you will not have a problem with Sticking Valves. DO NOT use Aeroshell W15W50 or Phillips 20W50 or you will have sticking Valves or Worse. Need better info on the lock tabs you speak of. As for different numbers, as long as you have some play and the valve move freely after the springs are removed you should be alright.

 

 

DLC, Regarding the oil type, what do you base this opinion on? I am currently using AS15/50 in our new R44 II, ( TT 250.0 ) with a pint of AVBLEND at each oil change. WE are obviously interested in reducing valve sticking problems, but conversations with RHC seem to indicate multi viscosity is the way to go.

 

And when releasing after compliance with SB 388, if you dont measure & record, how do you sign it off?

[KnuckleDragger]

DLC, Regarding the oil type, what do you base this opinion on? I am currently using AS15/50 in our new R44 II, ( TT 250.0 ) with a pint of AVBLEND at each oil change. WE are obviously interested in reducing valve sticking problems, but conversations with RHC seem to indicate multi viscosity is the way to go.

 

And when releasing after compliance with SB 388, if you dont measure & record, how do you sign it off?

 

Most of the problems with different numbers is through improper measurement procedures. I have seen a different engineers argue as to how the measurement is taken. I agree with the oil suggestion, 15/50 is crap. As to signing it off, as long as your numbers are within limits, or a go/no gauge passes, you can sign it off. You only have to write down the numbers in the tech logs or wo's if your mcm, mpm, or company policy demands it.

[thruthefence]

Most of the problems with different numbers is through improper measurement procedures. I have seen a different engineers argue as to how the measurement is taken. I agree with the oil suggestion, 15/50 is crap. As to signing it off, as long as your numbers are within limits, or a go/no gauge passes, you can sign it off. You only have to write down the numbers in the tech logs or wo's if your mcm, mpm, or company policy demands it.

 

Thanks for your input, have you seen any other problems related to AS15/50, high oil consumption, low compression numbers, ect? Any feelings about the "plus" version of Aeroshell? The AS80 is not readily available in this area. ( Southern USA).

 

thanks

[helidude]

We just changed oil type from 15W50 to 80 for this very reason. Robinson recomends doing the first check 100hrs (or is it 150hrs?) TSN on the engine.

Just sign it off as satisfactory or unsatisfactory.

[Bell-powered]

I would like to know a bit regarding this question...

We got a raven II and using Philips 20W50.. Would we be better off switching, and if so to what? We have big temperature difference through the year.. flying in -25 in the winter and +25-30 in the summer... not sure if it matters

[drkrider]

We've been operating R44 IIs in Northern Alberta for 8+ years running Aeroshell 15w50 with no sticking valve issues so far. I do know a lot of operators who are switching to straight 80w oil recently.

 

Helidude has enough R44s running around now he probably could give you some insight I think he told me they have 12 or 14 now do oil/gas patch work.

 

Sean

[helidude]

Big temperature changes are no problem as long as you switch oil in the spring and fall. We haven't had any problems with sticky valves since we switched to W80.