Thread: Puma power stuttering

is the correct procedure when draining all the crud off the fuel filter drain port to have the engine running or off?
i assume off but i have seen a few posts where people have drained off almost 200ml from the bottom of the filter. all i can manage is about 20ml.

justin

Originally Posted by Lorryman100

Just experienced these same issues on my mates 2007 Puma! Did all what I said earlier with no noticeable difference. So then we took off the inlet feed pipe (from the tank) from the filter head and noticed it was full of crud, detritus from the fuel tank, seems contaminated forecourt tanks are to blame? The filter head port is very fine and the crud was blocking the feed from the tank as there is no filtration between these points. So I am going to go with Blknights idea of using a pre TD5 OEM water trap between the tank and filter head

Water Filter Trap

Also if you try this at home you will need a Puma fuel bleeding pump to recharge the fuel system as the fuel pump may or may not do this. Or you could make one?

Defender2 - View topic - Puma fuel bleeding pump

Brian.

Brian, if you fit up the pre99 TD5 separator as blacknight suggested can you please share your findings. Been pondering on fitting a sedimenter for a while and to keep using LR stuff works for me.

In a private conversation with the man he suggested fitting a large hand pump inline to delete the need for the priming tool. A pump similar to the prime tool. Just need to clarify it would have enough open flow not to restrict the system.
Perhaps you can clarify, it is my understanding the flow side of the fuel system from the tank to pump is via very low vacuum, -12 or something, is this correct.
There is no pump in the fuel tank, rather just low vacuum produced from the pump in the engine bay, and once fuel is into the pump it goes up in pressure and into the rail.

As you can see my mechanicing is not vast.

thanks

I am now going to look into going with a Raccor filter instead as per this post here: Water Filter Trap

As to fitting a bulb type primer inline pre filter? I did look at using one of the many types of manual lift pumps used predominately on tractors. I have one from an old massey 35 and it has the glass sedimentor bowl as well. The problem comes in how to prime the pump after allowing air into the fuel system? I have the LR bleed tool which was expensive to buy but is a doddle to use and works first time everytime so hence why I thought the Raccor filter mounted between the tank and original filter would be the way for me to go as I could bleed the system any time it needed doing.

The fuel pumps utilizes a transfer pump in the low pressure side to draw fuel from the tank and through the filter to the pumps fuel inlet and the transfer pump. The suction pressure of the transfer pump is -30 to -20 Kpa. As a picture explains more than a thousand words here is a diagram of the Pumas fuel pump which also explains how the pump works to give you an idea of what it is doing.



Brian.

Brian, do you how much the fuel filter needs to be able to flow (l/hr)? Or how much the standard filter is capable of flowing?

Cheers,

Tim

Just found this for the Pumas OEM filter:
This is the fuel filter with LR part number. The interesting bit is the bowl kit at the bottom!!



36995 stanadyne fuel filter

I phoned to check and the glass bowl fits onto the bottom of an OEM filter by way of the drain screw and a metal rod which goes up into the filter.



Stanadyne Water Collection Bowl 29899

I am just going to order a new filter and bowl and see if it does enough to warrant not fitting the Raccor system and cutting into the tank feed.

Brian.

be interesting to see if it fits in the metal shield for the filter as well.

some thought on how sturdy the bowl is would also be well appreciated. Down here the corrugations can rattle you fillings out.

The shield can be altered if need be, so no concerns there, he says confidently As to the corrugations, as it uses the same mount as the OEM drain screw, does that ever come loose and cause issues? The reason I ask is that, touch wood, I've not had any issues with the fuel system as a whole driving the third world roads that make up Scotlands A and B roads

Brian.

ahhh all good then, your roads must be a bit like ours.

good find