Hello, On my Case 1835b, if I begin lifting a heavy load it stops. Maximum 50 lbs will be lifted. The Bucket has more power than the lift. I thought it could be the same problem like the Case 1845c Hydraulic Issue but the VALVE ASSEMBLY, LOADER CONTROL looks not like this on on the 1845c - see the pic. The Case worked until 2001, now we made a refit. The tandempump has been repaired by a mechanic. Does someone has an idea? Thorsten sorry, my bad english, i am from germany and don't talk every day.. ;-)
Sorry, the Pics:
Thorsten, Just trying to understand that last statement. Are you saying that if you roll back the bucket it will lift the load but if you use the lift circuit to raise the bucket it won't lift the load? Could you post the serial number for the machine so someone could see what type hydraulic valves it has. Also forgot to ask if this problem is something that just started or has it been getting worse over a period of time?
Thank you for your answer! "Are you saying that if you roll back the bucket it will lift the load but if you use the lift circuit to raise the bucket it won't lift the load?" Yes, thats right. The bucket has a little bit more power than the lift. "Could you post the serial number for the machine so someone could see what type hydraulic valves it has." There are no numbers on the Uniloader any more. Only the rope has a number. Look at the Pictures. He got another engine. A Daihatsu DL Engine from an Daihatsu Rocky... "Also forgot to ask if this problem is something that just started or has it been getting worse over a period of time?" The Loader stood about 15 Years outside, because he didn't work, after the new friend of my ex wife used it.. :-( I took him back and we repaired the tandempump - i hope in the right way. In 2001 they filled normal motoroil in the hydraulik circuit. My mechanik said the oil pulled water an it freeze.. He dismantled the pump, cleaned it, assambled it and it works. But he couldn't test if she had enough pressure. We have no posibillity to check it. I would be very glad, if your could help me, because in Germany is no one who knows something about the 1835B. To give up ist no option. Here are some Pictures:
Looking at that picture of the gear pump housing I'm thinking that pump may very well be your problem. A bit of cutting by the gear teeth is more or less normal but those mark do look deep. The other thing that is critical to a working gear pump is the condition of the end plates which are not shown in any picture.
Hello kshansen, thank you for your help! Sporry, we have no pictures frum the end plates. Do you mean the numbers 12, 14 and 16 on the Parts Diagram? The DRIVE GEAR AND SHAFT ( No 9) was broken, when i got the Loader back and we build in an new one. Now i am not sure what to do. Repair the pump or to buy a new one. What would you do?
I would have a hard time deciding on which way to proceed without seeing the parts in person. Pictures can only show so much detail. Is there any place near you that would have a good hydraulic shop that could look at this pump? Would not have to be a Case dealer, anyone familiar with gear type pumps should be able to advise you on it's condition. The end plates I was referring to are the parts I have circled in red in the picture below.
Hello kshansen, some bad News. :-( We replaced the Pump. Now the Bucket works, but not the Lift. If i roll back the bucket it will lift the load but if i use the lift circuit to raise the bucket it won't lift the load. But now the Bucket has much more Power than bevor. He lifts the Frontwheels up, with no problem. I think, its the Valve control, what do you think? Is there a posibility to repair or onliy to change?
Very tricky trying to diagnosis problems without being there to see what is happening in person. From what you are saying it sounds like the problem now could be in two different places. One being the valve and the other a bad cylinder packing. There are a couple tests I might want to do but not knowing what you have to work with is a problem. If you have a hose and gauge that you could attach to the valve where the lines that go to the "lift" side of the boom cylinders is attached you could remove the lines going to the cylinders and then run machine and see what kind of pressure you get there. Don't know exact spec's but should be something near 2,000 psi. Another test I might try if I had some extra hoses would be to at one of the lift cylinders disconnect the line going to the end of the cylinder the ram come out and connect a hose to the cylinder and put the end in a bucket and cap the hose that was connected to the cylinder. Then run machine and operate the controls to try to lift boom. If there is a large amount of oil coming out the hose connected to the ram end of the cylinder it would indicate an internal leak in one or both the cylinders. This could be a very messy test so care should be taken. Another maybe less messy way to test would be to disconnect both hoses and apply air pressure to the fittings on the cylinder to see if air passes through them. There will be oil in the cylinders so if you do put air in that oil can come out under pressure. Like I said trying to do this without being there is hard and not knowing how clear my ideas are coming through to you can make it a tough thing to explain. Just be very careful and be prepared for messes!
What does the engine do when you try to lift the boom? Does it have any load? make any sound? Does the boom lift at all with no load on it? Another way to test, not as accurate but quicker and less messy, start it up when cold and hold the boom up function for 30 seconds, then shut it off with the valve in the same position. Use a temperature gun/infrared non contact thermometer to see what's warmer than the rest of the hydraulics. That MIGHT show you exactly where it's leaking, the base of one of the cylinders where the piston is, or the valve. Probably not the pump but you'll want to check that too. If you have wet mornings with dew all over everything, this can work without the thermometer, the warm spot will "steam" in the right conditions.
Nice! Thanks for your answers! kshansen, the cylinders are new. The originals has been stolen a few years ago and my fried, who tried to repair, bought some new one. I will try to test the pressure, but it seems to be a mistake in the valves. Do i think right? There ist the Motor (runs), the Pump (its ok), the cylinders (new) and the valves (old). What else ist there?
Like I said long distance trouble shooting can be tricky. Many times what would take someone familiar with a machine a few seconds to figure out can take days of typing questions and more days waiting for a reply and often there is some minor detail that those trying to help forget was mentioned several posts back. But we will keep trying. As Delmer asked in his first question what happens when you try to lift the bucket? It might sound crazy but when the new cylinders were installed is it possible that lines got crossed and while one cylinder is trying to raise the arms the other is pushing down on the arms? I tried looking online for information on the control valve but I only saw a parts break-down that say (North America) so I'm not sure if a machine built for Europe would be the same. The one I saw does have two relief valves but does not say if one is for tilt and one for lift. Without more details on valve I would only be guessing if that could be the problem. Also the parts breakdown I saw indicated the relief valve were not sold separately. That does not mean someone who knows what there are doing could not remove and clean them.