Case 830 transfer pump

[clampit]

I am looking for a transfer pump for my case 830 with A301D engine. I talked to my local case IH dealer, and he could not find anything except the injector pump. Can I put an electric pump and by-pass this someway? Thanks

 

[mattb563]

The 830 case does NOT have a transfer pump!! It is gravitiy feed to the filters from the tank!! What kind of problem are you having??

 

[mEl]

The 830 indeed does have a transfer pump, it is on the back side of the injection pump and receives filtered fuel from the first stage filter, pressurizes it and sends it on through the filtering system. It does not have a "supply " pump from the tank. First stage filtering is gravity, or pulled by the transfer pump once bled. from there its a pressurized system. Parts or a pump will be readily available from a Robert Bosch service center. They are a truly trouble free pump and should be able to get replacement parts readily if needed. What is it doing or not doing? An electric pump is a possibility but I think the system would like a little more than automotive type pressures. mEl

 

[Anonymous-0]

830 does indeed have a transfer pump an system works just as mEL explained. Dont know p roblem clampit is having but if pressure light or pressure gage is not working poormans way of testing for pressure is you can feel pump pulses on short rubber hose from final filter to pump.Also just crack bleed valve on final filter an it should squirt . Eml an i probably would agree there is something else clampit should check such as plugged inlet in tank-plugged filters- an if filter base with first two filters has a t handle on it it needs to be closed.As for automotive pump just forget it an repair properly if transfer pump is in fact bad..

 

[Anonymous-0]

just to clarify it is mounted on the inj. pump between the the block and pump, as mEL said any pump shop should have parts, putting in an auto pump is spending money for junk that will fail when you need it, whereas the mech. pump will last for many thousands of hours, it is required to remove inj. pump to get at it, they very seldom give problems,most any dsl. systems require some sort of charge pump and the Case system is no differen't it definately is not a gravity only system as someone erronously posted here.

 

[clampit]

Thanks guys, the tractor has sit for some time, and when I started the tractor and ran it, it worked fine for a couple of hours, then it started to starve for fuel. All filters have been changed. I am leaning towards junk in the pump like as suggested. Can I clean it out without removing, like with air. Or should it be removed and disassembled?

 

[Anonymous-0]

Clampit -you said tractor set couple years an ran short time than starved. Could be tank has a dose of bacteria an other stuff in tank an your first filter is again plugged. I would remove bleed screw an see if fuel comes out in full stream . Have tank at least 1/2 full. If you have full stream than do whole bleed thing before removing pump. Note bacteria will show up as black stuff on filter

 

[clampit]

It is very cruddy looking, but no black stuff. I have put 2 sets of filters on it and ran for a while after bleeding, thats why I think it is something with the fuel tranfer pump. I have good flow to the second filter but very very slow after the third, which is also new and bled. I threw an electric pump on that I had and it does push fuel when the bypass valve is turned, but when it goes through the bosch pump it will still hardly push any fuel out. I am thinking maybee something is blocking flow through there. I don't know though? Thanks for your input

 

[mEl]

if your flow throuh the transfer pump is weak possibly the valves in the pump are sludged up. there is an inlet valve and an exhaust valve, they are located behind the big nut where the fittings screw into the transfer pump. the pump is a simple piston pump that simply displaces fuel as it moves in and out. check the valves for obstruction by algae as nothing should have got through the filters but fuel should flow easily through the pump with a minimum amount of pressure as the valves have a very soft spring load on the discs. If your filters are all new the flow through the final filter should be as strong as before. If you remove the valves from the TP to clean them be sure put them back in properly as if they are wrong they will block the fuel flow for sure and will fit either way.

 

[clampit]

The big nut under the inlet line? Can this be done without removing the pump? It could be some junk, I cleaned the lines out with air and either, but the filter base and bowls were pretty cruddy. Maybe some of the crud from the bowl mounting bolt came off and went into the transfer pump?

 

[mEl]

It's the nut the fitting screws into, kinda a thin nut. Don't know how accessable it is but soon will as I have a R Bosch to replace the American Bosch system on a 400 Diesel in the next few days, as soon as I receive new lines from Don L. Check the relief valve in the filter base to make sure the plunger is not stuck open, in fact stretch the spring a bit, it won't hurt a thing and will increase your transfer pump pressure, but you gotta get the flow. Later systems useing this system (70series) deleted the relief entirely. mEl

 

[JGarner]

mEl has been a Case mechanic since the 60's. You may want to rethink posting such rash comments. You are throwing rocks at someone way more qualified than yourself to give this kind of advise and his advise is always right on as he has worked on whatever tractor is being discussd at least once, probably hundreds of times!! For those of us on this forum that know who mEl is makes you look pretty .....

 

[Hoss In ME]

clampit,pay attention to mel,he knows what hes talking about.Plunger in transfer pump may be stuck.If your in need of a rebuild kit go to NAPA and ask for one for a 237 Mack diesel engine.I ran a low pressure 12volt pump once and worked good on my 301 diesel. Good luck Hoss

 

[Jim B]

Just to throw a little more Fuel (so to speak) into this discussion...
Unlike our Case (Farm Use) 800, 830, 930, 2470 & 2870 Diesels our Case 680CK, C series, Backhoe/Loader (construction/industrial use) has an original-equipment pulse-type 12v electric "prime" pump, with an internal washable filter. This pump is in-line from the fuel tank before the Bosch transfer pump. Note, that the transfer pump does not include a manual prime pump, like the farm use machines.
The engine used on the 680CK is a 301, otherwise, pretty much like the 830.

mEL, can you explain to this dummy why Case designed this difference?

 

[clampit]

Thanks so much for the help, I was able to pull the relief off of the filter base tonight, the valve was stuck closed. I was able to get it freed up and working after cleaning it. I will try to access the valve's on the inlet of the t-pump tomorrow.

 

[clampit]

Thanks all for the useful advise

 

[mEl]

Jim B, Not really, Electric pumps sure make bleeding a snap though. We had a 9020B excavator in our rental fleet that was a constant source of irritation from service calls to bleed the system and get started for customers. A 24V fuel pump solved that. mEl