Skymaster Forum  

Go Back   Skymaster Forum > Parts For Sale
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
Thread Tools Rate Thread Display Modes
  #1  
Unread 12-06-19, 03:50 PM
weebyf15 weebyf15 is offline
Registered User
 
Join Date: Feb 2019
Location: florida
Posts: 31
weebyf15 is on a distinguished road
looking for a P337 Rear vacuum relief valve

Hello guys, I have a 79 P337 that is not holding suction on the aft engine. On start up its fine but decays away after a few minutes of running. I suspect its the relief valve as the pump has been replaced. I was thinking someone may have removed all their vacuum gauges and may have the old aft relief valve they don't need. You can PM me or let me know if you have any ideas you wish to share.
Thanks Brad
Reply With Quote
  #2  
Unread 01-02-20, 11:42 AM
frank.oconnor19 frank.oconnor19 is offline
Registered User
 
Join Date: Feb 2019
Location: KAKH
Posts: 91
frank.oconnor19 is on a distinguished road
Vacuum Relief Valve

Did you get this figured out? Have you adjusted the relief valve?
Reply With Quote
  #3  
Unread 02-03-20, 01:04 PM
weebyf15 weebyf15 is offline
Registered User
 
Join Date: Feb 2019
Location: florida
Posts: 31
weebyf15 is on a distinguished road
Still not figured out but I have made multiple adjustments attempts and actually my mechanic tried two cleanings. I am having a used serviceable one shipped this week. I'll let you know.
Reply With Quote
  #4  
Unread 04-30-20, 02:40 PM
frank.oconnor19 frank.oconnor19 is offline
Registered User
 
Join Date: Feb 2019
Location: KAKH
Posts: 91
frank.oconnor19 is on a distinguished road
just curious, have you settled this? how?
Reply With Quote
  #5  
Unread 05-16-20, 05:44 PM
weebyf15 weebyf15 is offline
Registered User
 
Join Date: Feb 2019
Location: florida
Posts: 31
weebyf15 is on a distinguished road
Faulty manifold

Yes it is fixed; I had a faulty check valve in the vacuum manifold up under the co pilots feet area. Replaced manifold and fixed, but after burning about a grand with a new rear pump and regulator.
Reply With Quote
  #6  
Unread 05-16-20, 10:13 PM
hharney's Avatar
hharney hharney is offline
Forum Administrator
 
Join Date: Jul 2002
Location: Michigan (8D4)
Posts: 2,253
hharney is on a distinguished road
Wow, is the maintenance shop just changing parts to see if that works? That can get really expensive, do they know Skymasters?
__________________
Herb R Harney
1968 337C

Flying the same Skymaster for 47 years
Reply With Quote
  #7  
Unread 08-17-20, 05:29 PM
weebyf15 weebyf15 is offline
Registered User
 
Join Date: Feb 2019
Location: florida
Posts: 31
weebyf15 is on a distinguished road
Nope; Skymaster experience up here in the Florida Panhandle is hard to find. I am open to any and all suggestions. Been through three Mechanics, all were frustrated with the complexity of the P337. I don't push them, I'm pretty laid back. They all just want to work on something that does not get a write up every time It flies (which is getting very uncommon). I'm trying to view this as a marathon not a sprint, but....... Frustrating.
Reply With Quote
Reply


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 07:41 PM.


Powered by vBulletin® Version 3.6.9
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.