1966 C1600 transmission

Did not know it existed. But will check.

Air is getting in before first filter. To bleed I crack filter. Then open up bleed screw on pump. So if inunderstand correctly the screen couldn't cause this. But will still check anyway.

If your truck is a 66,its an AB,but you couldnt directly fit a Perk to the AB160.The C line had a different housing,and a Perk can then fit.Check your bellhousing,many early housings were set for both 4 and 5 speed trannys.This will be obvious because it will have extra unused holes.Your fuel setup should include a constant bleed with n/r valve(ball)on the CAV filter top,which is joined to the inj,bleeds.This rids the system of air continuously,as long as the lift pump is pumping.If the fine mesh filter in the pump top blocks,then the pump will pull unfiltered fuel back thru the other pipe on the gov assy.

Ok. So it has a c1600 badge on it and the rego papers say 1966. Chassis no c6375 if that means anything. I am confused.......pic of truck can be found here

www.hcvc.com.au/forum/restore/15416-inter-c1600

Thanks for explanation on fuel pump. Don't understand any of it but hopefully will make sense if I look at it while reading the post.

Thanks again all

Have you checked the breather on the tank isnt blocked this can cause you to loose prime intermittently as you drive along

Paul

When the system works as it should, the lift and charge pumps will push more diesel through the injection pump than is required. This is for cooling and lubrication, but it will maintain prime if there is a small leak. If the leak is big enough to let enough air in to overwhelm the pumps, it will be big enough to let diesel run out, so be on the look out for a wet patch. The screen at the back of the pump will clog up and act as though its full of air. This is the screen....





If you are losing prime when your not using it, install a check valve at the tank. That way, the fuel cannot run back to the tank if you do have a air leak somewhere.

The other problem with 354's is the drive gear on the injector pump. On earlier models, the gear would wear and drop down the shaft. Because its a worm drive, this will change the timing. If this is happening, you will notice a slight flutter from the exhaust when its held at a steady speed, but I have seen them bad enough to act as though they are not getting enough fuel.

Also if you can see into the tank, check for rubbish around the pick up.
If it is restricted the pump can draw air in from any join that is is a little suspect but not enough to show as a leak when it is stopped.
The last job with low power turned out to be rose thorns in the tank, along with a few sticks, grass tree fronds and 2 sections off funnels. Think some kids had been playing. Thorns made it up to the elbow on the top of the pick up.
Cheers Steve

If chassis says C,its a Cline.The plate in the door should agree,except the eng no.But you could get a factory Perk in the C line.The pump worm drive is fixed in the block,early motors had ball bearings,later motors had the "hydraulically loaded wormwheel" as its called in the manual.The flutter is called hunting and there are many theories on the cause.Mine is worn governor valve parts.Its doesnt affect trucks too bad,but put a Perk in a 1200 or 1300,and bad hunting will drive you mad.If its slow,its probably a 6.66 diff,the 6.14 is a bit better,still 50mph,You can get a 5.29 ,made by Spicer,who now make spares for Inter diffs.

Be careful when pulling screen out,there is a small screw and spring assy semi loose inside the big regulating spring.Make sure it goes in the same way as it was.This small screw assy is the bleeding bypass,for hand bleeding.The big spring is the pressure regulator,and it interacts with the governor to controll speed.The hydraulically governed DPA pumps are a marvellous device,less parts than a ignition distributor,yet with clean fuel they run forever.

The breather on one of the Jap ute tanks blocked,and the pump sucked the tank nearly flat.One time it had a mystery fuel problem,i had the tank out,washed it,back in out again,washed again,same prob.Finally found a 1" square of nylon shirt material.Invisible when wet,stuck to the tank when washed.A lot of this rubbish comes from the tanker drivers using bits of rag.

Hi all

Many thanks for the ideas.

1. Looked at the fuel system today. I have no tank return. The fuel goes lift pump, first filter, second filter, injector pump and back to second filter. This would mean air just accumulates in the system?

2. Tranny. Forgot magnet. One the side it says 886888R and under that 21/6/N. Little IH symbol under that.

3. Does the brake hub just bolt onto the back?

4. Are the Borg-Warner interchangeable with NP435?

Any thoughts on above?

Thanks
Aaron