HDJ81 1HD-T Issues, help

[LanceCruiser]

Sorry, I didn't have a lot of time to talk to you at the meeting, I had to tend to some club stuff. With the sucking sound comming from your tank, when you crack open the filler cap, means your vent tube is clogged. What year is your truck, and does it have a metal cap or a plastic one? If you have a metal one like mine, there is a vent tube in the filler neck and it is attached to a line that runs down to the crossmember, it might be clogged with mud. I think there is a one way valve on the tank too. The guys at ATEB dropped the tank and replaced it when they found it wasn't working. Raj at Fred Holmes said it makes the pump work harder than it has to. Send me a PM some of the guys get together for coffee. Mon and Thurs.

 

[huckthehaus]

Sorry, I didn't have a lot of time to talk to you at the meeting, I had to tend to some club stuff. With the sucking sound comming from your tank, when you crack open the filler cap, means your vent tube is clogged. What year is your truck, and does it have a metal cap or a plastic one? If you have a metal one like mine, there is a vent tube in the filler neck and it is attached to a line that runs down to the crossmember, it might be clogged with mud. I think there is a one way valve on the tank too. The guys at ATEB dropped the tank and replaced it when they found it wasn't working. Raj at Fred Holmes said it makes the pump work harder than it has to. Send me a PM some of the guys get together for coffee. Mon and Thurs.

great reply.

 

[T.Stanford]

I had a stubborn problem on mine about a year ago, same symptoms but worse. Ended up changing the filter body (the place the fuel filter spins on/ and the hand primer is located) , filter, and the lines to and from the IP. I first changed the filter and found in the process, that the primer pump was pooched....and they are unserviceable. The filter body also contains a check valve that doesn't allow the fuel to drain back to the tank....it won't anyway if there is no air leakage upstream of filter body. I put a new filter body(FB) on (w/ filter) but still had problems. I changed the rubber fuel lines for Vitron, but still no joy. I thought that maybe the screen in the tank may be obstructed with a chunk of scale or something, so I took the tank filler cap off and blew compressed air down the tank side of the FB. The problems continued.... I finally bit the bullet and took out the rear seats to gain access to the removable tank inspection panel. When I removed the panel, siphoned off the fuel and looked inside, I found the nylon screen on the bottom of the tank unattached. It also had a "film" on it that was almost completely impermeable. I used various toxic agents to clean this film out of the screen and I believe I found carb cleaner worked the best. I believe that the compressed air blew the screen right off the pickup tube because nothing was getting by that film. As I was putting everything back together I wondered how a screen that was unattached could affect how the the vehicle was running. So, not surprisingly the Cruiser ran much the same after I had buttoned it up...ARGHH. I reasoned that I had to change the filter again (the screen in the tank not doing the primary filtration) Eureka! She started running as she always had. Good luck.

 

[SHREDwagon]

Tank inspection panel? Where's that?

 

[T.Stanford]

In an 80 series there is a body panel under the rear seats that unbolts to gain access to the top of the tank where the pick-up tube enters the tank. To access the innards of the tank you simply remove the panel on the top of the tank through which the pick up tube goes through. You can easily see into and get your arm into the tank from there. Cheers

 

[BCR4619]

For those of you who opened your tank inspection panel did you just replace your gasket or re-use the one that is already there?

According to the FSM there is 1 gasket to get to the fuel sender unit/pickup line that says it "needs" to be replaced.

Cheers

 

[Dave 2000]

Tank inspection panel? Where's that?

https://forum.ih8mud.com/80-series-tech/370046-fuel-gauge-fault-found.html#post5366459

I did not replace the gasket which was in good condition, I just gave it a smear of silicone.

regards

Dave

 

[LanceCruiser]

I didn't know that.....This would be a good excuse for me to get rid of those 2 PIA safety bolts in the rear seats, and replace them with easily removeable grade 8 hex head bolts. It would be nice to have them out for extra room when you want it. Thanks for the great post Dave.

 

[Adam B]

Yep, it's a good idea to get rid of those stupid bolts. Although I went a bit further and just removed the rear seats permanently. I have so much space it's like having a pickup again - except I wouldn't want to move a load of manure now...

 

[BCR4619]

I think I have finally fixed my problems and started a new thread here....

https://forum.ih8mud.com/diesel-tec...fuel-suction-hose-filter-wow.html#post6111421

Cheers