John C.
Senior Member
I've always treated the nitrogen charge a nothing but a spring for the hammer inside the breaker to rebound on. The power in the hammer was due to the flow and pressure from hydraulic system.
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Guinea Pig
- Thread starter ianjoub
- Start date
I've always treated the nitrogen charge a nothing but a spring for the hammer inside the breaker to rebound on. The power in the hammer was due to the flow and pressure from hydraulic system.
92U 3406
Senior Member
Depends on the breaker. Some are full hydraulic and the nitrogen accumulator is only there to take the pressure spikes out of the return flow.
A breaker like we're looking at here uses hydraulic and the nitrogen to fire. Hydraulics push the piston up into the nitrogen chamber and the combined force of the nitrogen and hydraulics drive the piston down onto the toolbit. When the nitrogen charge is empty the breaker gets very weak since there's no nitrogen pressure in there for the piston to rebound against.
It is very common that I'll recharge a low hammer and then get a phone call from the customer once it gets on the jobsite saying it doesn't hit anymore. Once they turn the pressure relief up to where it should have been set at 99% of the time the breaker works properly.
ianjoub
Senior Member
Ok, first problem.
The skid steer threw at track at less than 5 hours. It was a PITA to get back on. When back on, it was popping and trying to walk off again. I brought it home and did the inspection. The sprocket retaining nut was missing and the sprocket would have walked all of the way off if the idlers didn't prevent it. I checked the other side. The nut had little to no torque on it. Maybe it is supposed to be that way for the bearing, I do not know as I have no service manuals. What I do know is it is a castle nut and the shaft is drilled for a cotter pin. No cotter pin was present on the side that still had the nut. I assume a cotter pin was not installed on the side that the nut went missing.
Now the big issue: Where do I find a 32mm x 1.75 nut? I haven't been to the shop for my thread pitch gauge yet. I measured the 32mm, my best guess is 1.75, looks to coarse to be 1.5...
The skid steer threw at track at less than 5 hours. It was a PITA to get back on. When back on, it was popping and trying to walk off again. I brought it home and did the inspection. The sprocket retaining nut was missing and the sprocket would have walked all of the way off if the idlers didn't prevent it. I checked the other side. The nut had little to no torque on it. Maybe it is supposed to be that way for the bearing, I do not know as I have no service manuals. What I do know is it is a castle nut and the shaft is drilled for a cotter pin. No cotter pin was present on the side that still had the nut. I assume a cotter pin was not installed on the side that the nut went missing.
Now the big issue: Where do I find a 32mm x 1.75 nut? I haven't been to the shop for my thread pitch gauge yet. I measured the 32mm, my best guess is 1.75, looks to coarse to be 1.5...
zeroo
Charter Member
Well, that sucks. But how was it for the 5 hr? I think it is obtainable even if you have to have it machined, but i bet it’s available in some form. Might not be a castle but you can drill it.
ianjoub
Senior Member
It is much stronger than the Vermeer 925 I have rented many times. It also pushes (bull dozer) MUCH better. It does need some counter weights and maybe some 'wheelie bars'. It likes to roll both ways in line with the tracks.
ianjoub
Senior Member
Edit:
M32 x 2.00
Anyone have on laying around?
M32 x 2.00
Anyone have on laying around?
ianjoub
Senior Member
I guess I should add:
The mini ex is doing fine. It works well, tracks well, and seems to have adequate power to do the work it was intended for. My only gripe is the 2.3 mph ground speed. WOW, it is slow tracking around!
The mini ex is doing fine. It works well, tracks well, and seems to have adequate power to do the work it was intended for. My only gripe is the 2.3 mph ground speed. WOW, it is slow tracking around!
zeroo
Charter Member
Well my u48-5 goes just wee bit faster at 3mph. It’s painful if i have to do something on the other side of farm. At least I have hvac and can watch youtube in the cab.
ANDDDDDD Hereeeeeeeee we goooooooooo!!!!!!!!!!!!!!!!!!
ianjoub
Senior Member
This is the inside of the track frame where the idler slider runs for track adjustment. The grease tensioner presses against the back and moves the idler/shaft forward. The cutouts in the bottom are where the rollers bolt through the frame. When the track came off, I loosened the grease zerk in the tensioner. I was able to press the idler back, but it stopped before it got far enough back leaving me insufficient play to get the track back on.
My field solution, as I was working in the muddy bottom of a fairly deep pit, was to cut the idler shaft. This allowed me enough play to get the track back on. When I got home I removed it and welded it back together. The weld will be fine as it can't go anywhere and the only force on it will be compression.
I figured out the tensioner was dropping slightly and then was pressing a flat portion against the square holes in the bottom of the track frame, thus not allowing the assembly to collapse any more. My solution was a piece of 16 gauge sheet metal cut to lay flat in the bottom of the track frame. This will prevent the tensioner assembly to get locked out too far when I need to collapse it again.
My field solution, as I was working in the muddy bottom of a fairly deep pit, was to cut the idler shaft. This allowed me enough play to get the track back on. When I got home I removed it and welded it back together. The weld will be fine as it can't go anywhere and the only force on it will be compression.
I figured out the tensioner was dropping slightly and then was pressing a flat portion against the square holes in the bottom of the track frame, thus not allowing the assembly to collapse any more. My solution was a piece of 16 gauge sheet metal cut to lay flat in the bottom of the track frame. This will prevent the tensioner assembly to get locked out too far when I need to collapse it again.
ianjoub
Senior Member
I got it back together fully collapsed.
Reinstalled and tensioned the track. I made another one for the other side but will wait to put it on. I am not sure I would be able to get the track off to do the job as the tensioner is likely to hang up and not collapse enough to get the track off. I will have to wait until it derails itself. Once it does, the reinstallation with my mod is a relatively quick and simple thing.
Reinstalled and tensioned the track. I made another one for the other side but will wait to put it on. I am not sure I would be able to get the track off to do the job as the tensioner is likely to hang up and not collapse enough to get the track off. I will have to wait until it derails itself. Once it does, the reinstallation with my mod is a relatively quick and simple thing.
ianjoub
Senior Member
Next up, drained battery on the mini skid steer. I look at the alternator and there is nothing plugged into the 3 prong connector on the back of the alternator. A quick search turned up no wire/connector in the area that was just unplugged...
92U 3406
Senior Member
At the price paid, if it takes a couple thousand and a bit of time to work some minor bugs out I'd say you're still ahead of the game.
ianjoub
Senior Member
It is a strong machine. I think it will be a good machine after all the 'bugs' are worked out. Or the machine is 'finished being built', whichever the case
ianjoub
Senior Member
OMG, I am rolling on the floor laughing.
I sent a message about no wires to the alternator and no charging. I got this video back!
Ok, unsupported file. It is a short video of someone hooking up a battery charger to the battery on the loader.
I guess there is no charging system despite the Kubota engine having an alternator on it.
I sent a message about no wires to the alternator and no charging. I got this video back!
Ok, unsupported file. It is a short video of someone hooking up a battery charger to the battery on the loader.
I guess there is no charging system despite the Kubota engine having an alternator on it.
92U 3406
Senior Member
That is epic!
Not a huge deal to hook up the alternator at least.
Not a huge deal to hook up the alternator at least.
zeroo
Charter Member
Probably need a regulator.
ianjoub
Senior Member
I was going to research the alternator by part number. It is part of the Kubota engine assembly, not the chinese company's unit. I would be surprised if it is not internally regulated. As I said, I will research it first though.
There is an alignment issue with the tensioner arm that holds the idlers. I have come up with a solution. I will post up with pics when I finally get back to it and effect the repairs. May be tomorrow or Monday. STAY TUNED
zeroo
Charter Member
You’re probably right, i wonder if it’s a 24v and thats why they don’t wire it up. Makes no sense to have functioning alternator and not use it.