M600 bobcat question.

[c094728]

I just acquired a 1970 M600 with the 4 cylinder Wisconsin VH4d engine in it. I'm trying to find the oil filter but it does not appear to be in the place mentioned in a online manual I found. Google tells me it might not have one. Is it possible there is no oil filter on this engine? It should be above the oil drain and the only thing there is the hydraulic pump.

2nd question. The Speed control does not seem to move the variable speed pulley. It seems to move maybe a eighth of an inch when you pull the lever and it's sitting at the slowest speed. Any idea why it is not moving? It looks like only one pulley runs on hydraulics and the other one just has a spring. Maybe it just needs greased. The bucket raises and lowers fine.

 

[brdgbldr]

I just acquired a 1970 M600 with the 4 cylinder Wisconsin VH4d engine in it. I'm trying to find the oil filter but it does not appear to be in the place mentioned in a online manual I found. Google tells me it might not have one. Is it possible there is no oil filter on this engine? It should be above the oil drain and the only thing there is the hydraulic pump.

2nd question. The Speed control does not seem to move the variable speed pulley. It seems to move maybe an eighth of an inch when you pull the lever and it's sitting at the slowest speed. Any idea why it is not moving? It looks like only one pulley runs on hydraulics and the other one just has a spring. Maybe it just needs greased. The bucket raises and lowers fine.

Have you tried looking in the parts catalog?

Here is the link:

https://partscatalog.bobcat.com/

 

[c094728]

I can't find anything on that page. It is asking for a serial number which I don't have. I do have a 610 parts catalog. Location where it shows the oil filter should be is not there on mine. I do see an oval pad on the side of engine that might be where it is supposed to go but the hydraulic pump is in front of it

 

[brdgbldr]

I can't find anything on that page. It is asking for a serial number which I don't have. I do have a 610 parts catalog. Location where it shows the oil filter should be is not there on mine. I do see an oval pad on the side of engine that might be where it is supposed to go but the hydraulic pump is in front of it

Go to “SELECT MODEL” and then just enter “600”.

Then you can try to find the schematic you need.

 

[c094728]

Thanks. I can see info on it. Still don't know about the oil filter but it definitely seems to not have one.
I'm also trying to figure out now if it is charging. I don't see any alternator under the seat but in that parts manual it shows something called a flywheel alternator as an option where it appears to be embedded in the flywheel. I didn't know that was a thing. But the battery voltage reads 12.5 with the engine running or turned off. Voltage does not change at all when started so I'm not sure it it is charging. I just ordered a new mechanical fuel pump as the one on there doesn't appear to work. They guy I bought it from had a gravity fed tank mounted on the back that feeds the carburetor directly and when I tie the line from that into the fuel pump it doesn't get any fuel through it.

 

[c094728]

This is the flywheel alternator part I was referring to
https://777parts.com/bobcat/600/s40405.html
I got a new mechanical fuel pump ($50) and am now able to run it off the original tank

 

[brdgbldr]

There are actually 2 different flywheel alternators listed in the parts catalog.

 

[c094728]

I confirmed it does have a flywheel alternator. Just to the right of the distributor there is a little module that is labeled
"flywheel alternator voltage regulator". It may be working. I just didn't see any battery voltage change between running and stopped.

 

[c094728]

One of the spark plugs has a little extension on it. I've never seen something like it before and was wondering if anyone know the reason this was put on?
I replaced the spark plugs and left it out. Then put it back. Didn't notice any difference in how it ran.

 

[c094728]

Found the answer to the spark plug question here. anti-fouling adapter
https://forums.yesterdaystractors.com/threads/spark-plug-extensions.941107/

 

[c094728]

There are actually 2 different flywheel alternators listed in the parts catalog.

It looks like I have the 2nd one since I have both the regulator and rectifier modules. ammeter doesn't work and this shows a wire coming from that to the ammeter which I think is probably disconnected.

 

[c094728]

I'm Still trying to figure out the problem with the variable speed belt and pulley system. How can the hydraulic pressure be tested? It looks like it only has one hose that controls it instead of two like the other hydraulic cylinders

 

[c094728]

I tried something that worked for someone on another thread and that is to raise the bucket and then while dropping it push the speed lever forward until after it pushes up on the ground which causes more pressure in the hydraulic system. Did this several times and got the pulley to compress almost all of the way. But now I caused another problem. When I was testing the speed it hopped pretty bad and the wiring harness that was crossed over the top of the driveshaft got wrapped around the driveshaft and ripped all of the wires from the front keybox . Now I have to re-wire it and figure out where they all go. I think there were only about 4 wires in that 7 pin harness that were being used. Trying to find a detailed wiring diagram but the only ones I've found only show wire going to the harness and not where it goes to on the other end.

 

[c094728]

The hydraulic filter restriction gauge on the right hand side is unreadable and broken. Does anyone know if this would work for that?
https://www.amazon.com/PG-DCI-20-Indicator-Hydraulic-Replaced/dp/B084YWQX9Y

 

[Jimsteinbrenner]

I tried something that worked for someone on another thread and that is to raise the bucket and then while dropping it push the speed lever forward until after it pushes up on the ground which causes more pressure in the hydraulic system. Did this several times and got the pulley to compress almost all of the way. But now I caused another problem. When I was testing the speed it hopped pretty bad and the wiring harness that was crossed over the top of the driveshaft got wrapped around the driveshaft and ripped all of the wires from the front keybox . Now I have to re-wire it and figure out where they all go. I think there were only about 4 wires in that 7 pin harness that were being used. Trying to find a detailed wiring diagram but the only ones I've found only show wire going to the harness and not where it goes to on the other end.

Interesting: So was this in an attempt to "Break it loose"? I believe my operator (610) Manuel said to only go into higher speed while moving and to slow it down before stopping to actually work. I guess after ya get your electrical harness back on and its running again you can let us know if its operating better now. Thanks , Jim

 

[c094728]

I just read the VH4D engine was in the 610. The VHFD was in the 600. So it seems mine was swapped out with the more powerful VH4D 30hp engine effectively making it a M610 since that was the main difference between the two models.

 

[c094728]

Found the best diagram of the flywheel alternator wiring here.
https://www.pittauto.com/customer/piauel/pdf/Wisconsin_VH4D_repair.pdfThe regulator broke free from it's metal mounting plate so I need to find a way to ground it because it says it must be grounded. If anyone know what alternate generic 2 pin regulator will work let me know.

 

[c094728]

Posted to wrong thread

 

[c094728]

Some pictures, after a little paint and decals, new seat, all new wiring
The engine shroud was full of mice nests that I needed to clean out. Was missing air filter cartridge that it now has.
found a filter bracket on ebay that I have yet to install

 

[c094728]

In case anyone else needs this info. I found a real inexpensive oil pressure switch/sender unit that works great here.
https://www.ebay.com/itm/255995041894VDO Dual Circuit Oil Pressure Switch 4PSI Floating Ground 230-604B NO/NC[/H1]

It switches at 4 PSI which is about right and has both normally opened and normally closed connections. I used the normally closed to power the oil light and the normally opened to power the hours meter. Both work now.

It attached to the oil filter bracket shown in image above. I had a problem with that baldwin oil filter as the gasket was not thick enough to prevent it from leaking (badly). I searched at walmart for an oil filter that had a same sized gasket and couldn't find one that was exact but found one that would stretch over the filter (It's kind of like a mason jar) and used it along with the provided gasket and got it to seal. All of the gaskets on those filters were twice as thick as the one provided so I don't know why it is was so thin.