Post inflight Vacuum pump failure - fly?

[TargetDriver]

You're right Jetdriven, it is.  Thought I might cut it open to inspect for very small particles or an amount of dust.   The new pump I have (Rapco) has the wear port as well with a small inspection capscrew ...and the cutest little plastic calipers to check it with. ha

So I've replaced the pump and the new filter now. The hoses on both sides were two different types and there were squeeze clamps and screw clamps so I replaced all of it with new hose as well and all new screw type hose clamps. I also cut most of the old tie wraps away, cleaned the wiring and tie wrapped. Picture attached. 

[jetdriven]

2 hours ago, TargetDriver said:

You're right Jetdriven, it is.  Thought I might cut it open to inspect for very small particles or an amount of dust.   The new pump I have (Rapco) has the wear port as well with a small inspection capscrew ...and the cutest little plastic calipers to check it with. ha

So I've replaced the pump and the new filter now. The hoses on both sides were two different types and there were squeeze clamps and screw clamps so I replaced all of it with new hose as well and all new screw type hose clamps. I also cut most of the old tie wraps away, cleaned the wiring and tie wrapped. Picture attached. 

That looks very nice 

[Guest]

6 hours ago, TargetDriver said:

You're right Jetdriven, it is.  Thought I might cut it open to inspect for very small particles or an amount of dust.   The new pump I have (Rapco) has the wear port as well with a small inspection capscrew ...and the cutest little plastic calipers to check it with. ha

So I've replaced the pump and the new filter now. The hoses on both sides were two different types and there were squeeze clamps and screw clamps so I replaced all of it with new hose as well and all new screw type hose clamps. I also cut most of the old tie wraps away, cleaned the wiring and tie wrapped. Picture attached. 

You may want to remove the Tyrap from the steel engine mount tube on the left upper tube.  They are known to damage steel.  Rubber Adel clamps are best.

Clarence

[carusoam]

That is a clean looking engine bay!

Under the since you are in there category....

And in line with Clarence's point of things that surprisingly wear other things....

what is the line that passes over the vacuum pump and goes through the firewall? (Rpm cable?)

the nylon wrap seems to be worn where it was in contact with the vac pump's inlet/outlet.

Consider Having your mechanic put some protection back on there as well.

If the rpm cable were to cut the vac line...

If the vac line was to cut the rpm cable...

PP observations.  I am not a mechanic...

Best regards,

-a-

[Supercop0184]

2 hours ago, M20Doc said:

You may want to remove the Tyrap from the steel engine mount tube on the left upper tube.  They are known to damage steel.  Rubber Adel clamps are best.

Clarence

I CAN ATTTEST they will damage your engine mount if left on long enough. Mine was found at last annual, LUCKILY, it hadn't damaged it yet but had rubbed raw the area surrounding it. My Mech was in shock when he found it, and acted like it was coated with acid he took it off so quickly. HAHA! He said he's seen times when having the zip tie around the engine mount compromised the integrity of the metal at that point. That kinda stuff blows my mind LOL!

[N201MKTurbo]

If you wrap the tubes with friction tape before putting on the TyWraps it won't wear the tubes or slide around. It is effective under cushioned Adel clamps too. It is a bit hard to find these days, but is usually found in the aviation plumbing isle at the Depot.

[TargetDriver]

Great observations guys. Yes the cable passing close to the vacuum pump is the throttle (RPM) cable. The photo is somewhat deceptive in that there is actually 1/2" between both vacuum pump tubes and the cable. I had to leave early Sunday before finishing up the "detailing" so didn't get to some of it. The rubber abrasion sleeve with a single tie wrap was originally closer to the intake tube of the vacuum pump, most likely as a precaution for contact. I still have to move it back, clean it and re-tie.

I'll end up detailing the entire engine compartment as I get to it. I like things very clean and organized. Makes it so much easier to spot leaks or trace any issues. Attached is a picture of my Top Dragster E bay with the body off showing my wiring.  It's okay in that world to tie-to-tubes since they are only on like that for usually a season or two before redoing. 

I just lightly wiped the firewall down but the pane is that clean most everywhere. (except the underside near the fuel tank leaks, but starting to work on that project now with a fuel tank cleaner system and reseal)

The tie wrap (we call 'em zip ties) on the engine mount tube was there to hold that wire bunch in place while tying them. I have it on my No-Fly card to remove before buttoning up. It is amazing what a small piece of plastic can do to a steel tube when enough vibration is given over time.

 

[TargetDriver]

Turbo, I've been in the Depot a couple times... but where exactly is that "aviation" isle ?   I'm fixing to spend me some money there ! .. like they don't get enough of it now ! ha !

[Guest]

if you're really old you may remember this stuff called Koro seal lacing cord:

http://www.aircraftspruce.ca/catalog/elpages/koroseal05-11195.php?clickkey=13003

[markejackson02]

13 hours ago, TargetDriver said:

You're right Jetdriven, it is.  Thought I might cut it open to inspect for very small particles or an amount of dust.   The new pump I have (Rapco) has the wear port as well with a small inspection capscrew ...and the cutest little plastic calipers to check it with. ha

So I've replaced the pump and the new filter now. The hoses on both sides were two different types and there were squeeze clamps and screw clamps so I replaced all of it with new hose as well and all new screw type hose clamps. I also cut most of the old tie wraps away, cleaned the wiring and tie wrapped. Picture attached. 

What are the red fittings in the vacuum line?  It looks like there is one toward the right side of the picture as well.  Is that for a stand-by system?

[TargetDriver]

They are one-way check valves. Haven't seen those in this application before but they were there when I cracked her open. You can barely see it, but there's one on the right side of  the picture that goes between the electric standby vac pump as well. It's mounted vertically on the extreme right side of the firewall (Left seat side).

[Yooper Rocketman]

5 hours ago, M20Doc said:

if you're really old you may remember this stuff called Koro seal lacing cord:

http://www.aircraftspruce.ca/catalog/elpages/koroseal05-11195.php?clickkey=13003

Doc,. Now you are really dating yourself.  

[Guest]

Just now, Yooper Rocketman said:

Doc,. Now you are really dating yourself.  

The joys of being at this for a few years.

Clarence

[Yooper Rocketman]

That's why my Avatar is a picture from a lot of years ago (not sharing when, but prior posts should give some timeline).  I may tease you about your Comanche, but clearly appreciate your knowledge and contribution here.

tom