Reply
 
Thread Tools Search this Thread
 
Old 25 October 2012, 16:31   #1
Member
 
Ian_st's Avatar
 
Country: UK - England
Town: Bristol
Make: Humber
Length: 5m +
Engine: Mercury 60 outboard
Join Date: Jul 2012
Posts: 114
New Rib losing pressure in one section

Hi all, am new to ribbing and need some help and advise

The rib is a new Humber Assault 5.0m.

Have used it once without issue, but am noticing that the rear tube is losing pressure (significantly). Thinking originally that this was cold related I reset the pressure in the tubes so that the 2 adjacent tubes were the same pressure. For 10 days all ok, and on Monday was working on the boat and it was all ok as I was looking at the transom adjacent to the area.

Go out tonight to find the tube deflated once again.

Cannot understand why this is the case as if it deflated gradually it would lead to a slow leak, but this seems to be fine then a big leak. Have done a search to look for the leak, but it seems very puzzling.

Any help and advise would be greatly appreciated.

Thanks Ian
__________________

__________________
Ian_st is offline   Reply With Quote
Old 25 October 2012, 16:40   #2
Member
 
mister p's Avatar
 
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
Where's your boat parked up? I found school kiddies letting air out when I left the trailer on the drive overnight before a run. The little blighters even do that on campsites.
__________________

__________________
mister p is offline   Reply With Quote
Old 25 October 2012, 16:47   #3
Member
 
Ian_st's Avatar
 
Country: UK - England
Town: Bristol
Make: Humber
Length: 5m +
Engine: Mercury 60 outboard
Join Date: Jul 2012
Posts: 114
It's in my fathers back garden... Now although he is a P.I.T.A at 73 I doubt I can blame him. It would have been in the garage but its 6 inches too long.
__________________
Ian_st is offline   Reply With Quote
Old 25 October 2012, 18:07   #4
Trade member
 
Ribstore's Avatar
 
Country: UK - England
Town: UK
Length: 5m +
Join Date: Nov 2010
Posts: 128
Hi Ian, You say you have 'done a search' but have you done the usual soapy water test of the whole tube and valves? See our guide here. Chris
__________________
Parts and advice for RIBs and SIBs
www.Ribstore.co.uk
Ribstore is offline   Reply With Quote
Old 26 October 2012, 03:15   #5
Member
 
Ribshop's Avatar
 
Country: UK - England
Town: River Hamble
Length: 6m +
Join Date: Oct 2005
Posts: 726
Hi Ian, just lake your father in law these leaks can be a PITA. The first place to check is the valve. If you can imagine there is a rubber diaphragm inside the valve that is sprung loaded and seats its self against a plastic base. All the while there is high pressure behind the rubber it seats well but if it is slightly damaged or there is dirt on the seating area it will leak faster the more pressure decreases.
Fitting a new diaphragm is easy and you can find the instructions here:
http://www.rib-shop.com/prodtype.asp...ageHistory=cat
If it is not the valve move on to areas that are pushed up against something when the tubes are inflated, where the tube joins the top or bottom of the transom are common area or where the tube fits the hull.

If you are still having problems one of us will be happy to talk you through it on the phone.

Kieron
__________________
RIB REPAIRS | RE-TUBES | RE-FIT - OUTBOARD SERVICING - ONLINE SHOP FOR RIB & TOHATSU PARTS .
Phone: 01489 556800 www.rib-shop.com
Ribshop is offline   Reply With Quote
Old 28 October 2012, 07:21   #6
Member
 
Country: Other
Town: Stanley, Falkland Is
Boat name: Seawolf
Make: Osprey Vipermax 5.8
Length: 5m +
Engine: Etec 150
Join Date: Mar 2006
Posts: 3,688
I'd vote for the valve too. If I reduce the pressure in my VM tubes for storage, it then doesn't hold air unless the valve cap is on tight, and goes completely flat. Pumped up to operating pressure, and with the cap on, no problems at all.
__________________
A Boat is a hole in the water, surrounded by fibreglass, into which you throw money...

Sent from my Computer, using a keyboard and mouse
BogMonster is offline   Reply With Quote
Old 28 October 2012, 08:34   #7
Member
 
Country: UK - England
Town: Surrey
Boat name: Fugly & Rokraider 1
Make: Pac 22 & Porter 6.5
Length: 6m +
Engine: Ford 250 & jet,DT140
Join Date: Jun 2008
Posts: 681
Is it not a warranty issue, if it is a new Humber? f it is under warranty and you have had a go at repairing it yourself, you could invalidate the warranty.
__________________
Rokraider is offline   Reply With Quote
Old 28 October 2012, 08:40   #8
RIBnet admin team
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 12,928
RIBase
Quote:
Originally Posted by Rokraider View Post
Is it not a warranty issue,
Only if he actually has a leak. A speck of dirt in a valve or incorrect inflation hardly makes it a warranty job

OP - what pressure are you inflating the tubes to?
__________________

__________________
willk is offline   Reply With Quote
Reply

Tags
rib

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 19:47.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.