No oil pressure

[Boatdoctor]

I am new to the working on skid loaders. I am a boat mechanic by trade. I am helping a neighbor. The skid loader is a 630 with what I believe is a v4 Wisconsin. He brought it to my shop with no oil pressure. I checked the oil and added some to it. Cranked over with no filter and I got nothing coming out of filter hoising so I am pretty sure it has no oil pressure. Where is the oil pump on this engine and how hard is it to get to. Thanks in advance for any and all help.

 

[6brnorma]

I am not an expert on the 630……but I believe it has the Wisconsin VH4D and I am very familiar with that engine. "If" it is the VH4D……the oil pump is accessed through the oil pan AND you would have to pull the flywheel and gear cover to get to it…….a major task. That would hold true with any of the Wisconsin V4 engines……VF4D, VG4D etc. etc………. Oil pressure is extremely low on these engines (4 - 5lbs normal…..max at 2800 RPM is 15lbs) they work on a "splash/spray" system…….they are a pretty bomb proof pump but they do fail occasionally.

 

[6brnorma]

I am not an expert on the 630……but I believe it has the Wisconsin VH4D and I am very familiar with that engine. "If" it is the VH4D……the oil pump is accessed through the oil pan AND you would have to pull the flywheel and gear cover to get to it…….a major task. That would hold true with any of the Wisconsin V4 engines……VF4D, VG4D etc. etc………. Oil pressure is extremely low on these engines (4 - 5lbs normal…..max at 2800 RPM is 15lbs) they work on a "splash/spray" system…….they are a pretty bomb proof pump but they do fail occasionally.

Just to emphasize……..I have 42 years of running M-600 (VF4D) and M-610 (VH4D) 6 to 8 of them at a time literally thousands of hours and lost lots of engines…….never lost one to the oil pump. (Did I just jinx myself)