stick cylinder

uffex · Jan 5, 2019

Good day
Just caught up with your thread, the best help you can have is a hydraulic schematic and wiring diagram. for your machine, most if not all issues can be fixed with these two documents, I suggest if you intend to keep the machine try to get hold of these even if you cannot make sense of these we sure can. Have a good day.
Kind regards
Uffex

mce5802 · Jan 5, 2019

I will try and get those, manuals seem hard to come by. The parts book does have a wiring diagram but no hydraulic schematic. I do plan to keep it, I might buy a second newer mini at some point but this one shows 3128 hours and the meter still works, will probably run me a long time. Thanks again for your help, it is greatly appreciated. You guys probably saved me a fortune in trips to the hydraulic shop trying to fix a non-existent problem.

John C. · Jan 5, 2019

I see what you are describing all the time. The pump can’t put out enough oil so a suction valve opens a circuit to the tank to allow oil to be pulled into the cylinder. That provision is usually part of the circuit relief valve cartridge. Without seeing a schematic of the system we would only be guessing about which component to point at.

mce5802 · Jan 6, 2019

I don't have a schematic and I'm not sure where to find one. That block I mentioned must be some kind of suction valve? Its the only valve in any of the circuits besides the manifold that I can see. There is an adjustment on it.

mce5802 · Jan 6, 2019

What you guys all are saying is that this is inherent to a fixed displacement pump system, correct? Or is it worth having that valve rebuilt?

uffex · Jan 6, 2019

Good day Mike
John C comment is spot on refilling of a negative pressure cylinder is provided by a simple check valve, this relies on some form of tank pressure, if you have a small breather filter on the tank try pressing the button on the top after stroking the cylinders, you should hear a rush of air if not it could contribute to your situation. Again if you had the Hydraulic schematic it would explain how the machine is meant to work.
Normally dealers can get schematic it does not cost money to mail it to you, suggest you give it a shot.
Kind regards
Uffex

tctractors · Jan 6, 2019

A good thing to do would be to strip down the stick cylinder and check the piston nut on the rod as it sounds loose to me, I am No expert but it would be easy to take a peep. tctractors

funwithfuel · Jan 6, 2019

mce5802, you can do whatever you want, just keep in mind you're working with a mini ex . You have a simple linkage controlled valve bank. You may not have all the bells and whistles incorporated into larger/premium machines. If I were you, I'd ask the dealer servicing your area if this is normal for the line.
I personally feel you're about to jump headfirst down the rabbit hole which will not you expense but also experience. My 2cents worth for the low low price of free. Good luck in whichever path you choose.

mce5802 · Jan 6, 2019

First mini I've run to speak of, you guys definitely know more about their operation than me. I think I will get engine rpms up to spec n leave it alone, use it next summer n see. will try n get schematics and service manual in the meantime. Thanks for the advice, it's always good to hear I dont have to spend money.

uffex · Jan 7, 2019

Good day Mike
Contacted the local Hanix dealer he was real help full sent a parts book and Hydraulic schematic although its not very clear to my 70 year old eyes but I can see an adjustable restrictor on the negative side of the cylinder you could try half a turn may help your issue. Checked the parts book could not locate the valve but if you follow the tube from the cylinder you should be able to find it.
Keep smiling
Uffex

uffex · Jan 7, 2019

Missed one point pump "G3" has a possibility to help at low pressure via valve R4 this is the pump for the Dozer and swing cylinder I assume theses are working OK.

uffex · Jan 7, 2019

Update explanation

mce5802 · Jan 7, 2019

Again, thank you uffex. I can't view these files righ now but will try again when I get home. The pump for the blade works but is real slow. It may have too large of a pulley the guy mentioned he changed it. The block I mentioned before is bolted to the two valves for the blade and boom pivot, so what you said makes sense. I wasn't expecting you to go to all this trouble, but I greatly appreciate it. Could it be the auxiliary pump is turning too slow and causing this problem?

uffex · Jan 8, 2019

Good day Mike
We can discount tank pressurisation as your machine is devoid of such a device, in view of what you stated regarding Pump 3 I would say there is a high probability that you put your finger on the cause of the issue.
I have checked there is no specification for the P3 and I can only suggest you measure the revolutions and see if any label on the pump gives us the displacement, we can work out the flow from that info.
You could appeal on the forum for other Hanix users to measure there dozer speed it would give us a base line to work from.
Kind regards
Uffex

mce5802 · Jan 8, 2019

Ok I will post a new thread, but I think you are right. I've found pictures showing the pump on an original mitsubishi engine and it shows it mounted directly to the timing cover, presumably splined into a gear driven off the crank. Who knows if the guys who did the motor swap paid any attention to the reduction, I'm guessing they did not. The blade will easily lift the weight of the machine, but moves pretty slow going both up and down. The blade has two cylinders, so I would guess it requires considerable flow to move at a reasonable rate.

mtBandit · Aug 3, 2022

old thread i know. i have an old sb30 i just picked up and wondered if yall had anymore pds of service etc. i cant find an id on the engine and i need a starter. local rebuilders cant find parts either

uffex · Aug 4, 2022

Good day
I suggest you use the on line calculator to establish if the cylinder speed is correct click on the link.
http://www.calculatoredge.com/
Kind regards
Uffex

funwithfuel · Aug 4, 2022

mtBandit said:
old thread i know. i have an old sb30 i just picked up and wondered if yall had anymore pds of service etc. i cant find an id on the engine and i need a starter. local rebuilders cant find parts either

Ok, first, welcome to the forum. Go on over to "new member introductions " say hi and tell everyone what you're up to. Now, let's go back and start over. What I'd ask is to start a new thread. Make sure to list your machine model and serial number. If you can, include your engine model and serial number.
A lot of folks won't pick up on a zombie thread cuz it's usually some foreign entity trying to pedal their products. Good luck.

mtBandit · Aug 4, 2022

funwithfuel said:
Ok, first, welcome to the forum. Go on over to "new member introductions " say hi and tell everyone what you're up to. Now, let's go back and start over. What I'd ask is to start a new thread. Make sure to list your machine model and serial number. If you can, include your engine model and serial number.
A lot of folks won't pick up on a zombie thread cuz it's usually some foreign entity trying to pedal their products. Good luck.

ive searched and looked through the new threads and noone responds to new threads. Its a nissan sb30 with a 3 cyl diesel. all my research said they came with 4cyl diesels. there are no serial #s or markings on the engine. i drug this think out of a barn and been running it a year until the starter went out. took it to 3 starter rebuild shops and they cant find parts for the starter. ive ordered 3 starters online that looked exactly like the starter i have but bolt patterns where off or they was smaller. but ill start another thread if it can get my equipment going

funwithfuel · Aug 4, 2022

If new threads are left hanging, it's usually because no one has anything to share. I won't usually get involved unless it's Komatsu or Volvo related. But general knowledge, everyone has their own twist. I don't know if there are still pic restrictions for new members or not, but if you can attach pics and any numbers you can find, no matter how obscure, that will give everyone a chance to help. Good luck. And mostly, welcome

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