Oil Door Latch Spring

[Marc_B]

Have Hartwell latches on my oil filler access door and two of the springs are rusted out and near breaking.  Lasar used to sell the latches, but no longer available.  However, all I need is the simple spring...does anyone have a product number/dimensions for spring and a source for purchase?  The latch is Hartwell H-4600-051-115 if that helps.  Thanks!

[alextstone]

 

Perhaps this would contain what you need: 

Amazon Spring Kit

https://a.co/d/7Ywp9XF

[Hank]

Check with Lee Springs. You'll need to know wire diameter, the outside diameter of the spring and the length of the spring when it's out of the latch, laying on the table.

Note that it may be cheaper to buy a couple dozen springs than just a couple.

Lee Springs makes a zillion springs in multiple materials and all kinds of sizes. Measure carefully with calipers to assure a good fit.

[IvanP]

McMasterCarr should have something what would meet your needs

https://www.mcmaster.com/products/springs/springs-2~/spring-type~extension/ 

 

[AJ88V]

Oh, I'd be worried about the 337!

[Marc_B]

I found these...HARTWELL LATCH SPRINGS H4609 FOR H4600 / H5000 LATCHES SET OF 5  https://www.ebay.com/itm/264774515036

McMaster or Carr could probably sell some to spec but not sure the size without taking off and measuring...I couldn't find a spec online for a H4609 spring nor a parts diagram for the Hartwell latch.  The ebay springs are cheap enough that I'll probably just order a package and see if they're the right spring.

[IvanP]

20 minutes ago, AJ88V said:

Oh, I'd be worried about the 337!

Might also need an STC for 1 AMU

[EricJ]

+1 to just find a box of springs or something similar and replace it.    This pretty much fits the description of "small standard parts".    It just needs to be able to do the job.   They're easy to inspect and replace.

[N201MKTurbo]

https://www.wicksaircraft.com/shop/h4600-hartwell-latch/?woo_id=239164&gad_source=1&gbraid=0AAAAACWeXA-kX5qNWOccishueH_wiytUd&gclid=EAIaIQobChMIzr-erunLiQMVLShECB3JoSGCEAQYASABEgJlCfD_BwE

[hypertech]

I was also missing some.  Bought a couple NOS switches from eBay and took them from there.  Easy peasy.

[mike_elliott]

On 11/7/2024 at 5:36 PM, Marc_B said:

Have Hartwell latches on my oil filler access door and two of the springs are rusted out and near breaking.  Lasar used to sell the latches, but no longer available.  However, all I need is the simple spring...does anyone have a product number/dimensions for spring and a source for purchase?  The latch is Hartwell H-4600-051-115 if that helps.  Thanks!

I may have one still I’ll check. I gave most of my aircraft hardware to @junkman when I gave up my hangar, but I’ll look in a bit.

[mike_elliott]

21 minutes ago, mike_elliott said:

I may have one still I’ll check. I gave most of my aircraft hardware to @junkman when I gave up my hangar, but I’ll look in a bit.

Yep, found it

[Marc_B]

@mike_elliott I didn't need a complete latch but rather wanted to replace the rusted springs.  I'll see if the ebay order are the correct springs and will PM you if they aren't the right springs.  But that does look like the same latch on my oil door.

[mike_elliott]

It should be I got them from Mooney when I needed to replace one on my F years ago because the hole for the latch pin elongated and would pop open in flight. the 2nd latch held fortunately. Anyway, let me know if you decide you need it, and we can go from there.