Dear all
I noticed today a diesel leak from what looks like a round disc (diaphragm) on the front side of the vertical fuel pump. Not sure what this does (some kind of regulation?). Is it common to develop a leak there? I can't see exactly from where the leak is actually coming.
Thanks Peter
Perkins 6.354 fuel pump JCB 814
-
- Moderator
- Posts: 8699
- Joined: Sun Aug 05, 2007 8:36 pm
- Real name: Jeremy Rowland
- Has thanked: 1887 times
- Been thanked: 1700 times
Re: Perkins 6.354 fuel pump JCB 814
Pete what does this look like? I was wondering if it was one of the pumps valves? Are you sure the diesel is not running down to there from a higher place?
Jeremy
Jeremy
-
Topic author - Posts: 4089
- Joined: Fri Jul 13, 2007 12:43 am
- Real name: essexpete
- Has thanked: 854 times
- Been thanked: 697 times
Re: Perkins 6.354 fuel pump JCB 814
Jeremy Rowland wrote:Pete what does this look like? I was wondering if it was one of the pumps valves? Are you sure the diesel is not running down to there from a higher place?
Jeremy
Good point I shall have to clean it up a bit. I found a photo on the web, not all pumps appear to be fitted with it.
Thanks
You do not have the required permissions to view the files attached to this post.
-
- Posts: 64
- Joined: Wed Jul 07, 2010 10:37 pm
- Real name: Kári Össurarson
- Has thanked: 1 time
- Been thanked: 15 times
- Flag:
- Contact:
Re: Perkins 6.354 fuel pump JCB 814
This got me intrigued enough to do a bit of googling. According to http://www.tadiesels.com/fuel_injector_acc.html , this is an "Injection Pump Damper".
--
Regards, Kári.
--
Regards, Kári.
-
- Moderator
- Posts: 8699
- Joined: Sun Aug 05, 2007 8:36 pm
- Real name: Jeremy Rowland
- Has thanked: 1887 times
- Been thanked: 1700 times
Re: Perkins 6.354 fuel pump JCB 814
Okay now I know what we are looking at is it a bad leak or not? Pete I would have thought you would only get this issue fixed by an injection pump specialist?
Jeremy
Jeremy
-
- Posts: 2358
- Joined: Wed Dec 09, 2009 11:28 pm
- Real name: fred evans
- Has thanked: 1295 times
- Been thanked: 1111 times
- Flag:
Re: Perkins 6.354 fuel pump JCB 814
essexpete wrote:Dear all
I noticed today a diesel leak from what looks like a round disc (diaphragm) on the front side of the vertical fuel pump. Not sure what this does (some kind of regulation?). Is it common to develop a leak there? I can't see exactly from where the leak is actually coming.
Thanks Peter
Hi Pete.
That roumd disk thing is a damper, part of the two stage advance and retard mechanism.
The unit avances and retards the injection timing according to engine speed and load , (stage one), and further retards the timing to assist cold starting, (stage two).
Some of the early DPA pumps I worked on,( fitted to David Browns), had a manual version opperated by a screw on the advance and retard unit.
There is a gasket between the unit and the pump body and four or five other seals / washers all of which I suppose may leak.
It's not difficult to replace them and pump overhaul seal kits are readily available for a few quid, (try ebay). Its the same kit for the mechanically governed four and six cylinder pumps.
Fred
-
- Posts: 2358
- Joined: Wed Dec 09, 2009 11:28 pm
- Real name: fred evans
- Has thanked: 1295 times
- Been thanked: 1111 times
- Flag:
-
Topic author - Posts: 4089
- Joined: Fri Jul 13, 2007 12:43 am
- Real name: essexpete
- Has thanked: 854 times
- Been thanked: 697 times
Re: Perkins 6.354 fuel pump JCB 814
Thank you very much for your reply. It is not a huge amount leaking at the moment but you would not want to spend the night underneath the old girl anyway! I will keep an eye on it now I know what it is. Funnily enough it had not been run for a couple of months at least with the warmish weather yesterday it fired almost instantly. It has done over 15k hrs and I don't think the engine has been touched. Tempting fate but I will change the oil.
Who is online
Users browsing this forum: No registered users and 4 guests