Transmission hydraulic fluid capacity

OzKioti · Jul 5, 2020

I have a 2004 LG Neo47. (LG was renamed to LS over the years) The engine is the Mitsubishi S4QL (47hp).

I have always been puzzled by the discrepancy between the stated oil capacity of the transmission in the owner's manual, as opposed to what it actually takes.

The manual actually states two capacities - 41 litres on one page, then 46 litres on another page. However when I change the oil, after letting it drain for an hour or so, I have found that adding just 37 litres brings it up to the "full" mark on the dipstick.

My neighbour who has a McCormick, told me yesterday that he has the same issue.

Is this a common trait with tractor manuals? I'd be interested if other tractor owners have found this.

For info, 37, 41 & 46 litres translates to 9.8, 10.8, & 12.2 US gallons.

ptsg · Jul 5, 2020

Usually the capacities listed on the manuals are with the transmission fully empty.

When you drain the oil, there is a lot left over there, inside the transmission housings, hydraulic lines, pumps, etc. So you'll never be able to add the amount said in the manuals. Same applies for engines or anything that requires fluid changes really.

RickB · Jul 5, 2020

Discrepancies in manuals are far too common.

OzKioti · Jul 5, 2020

That makes sense, residual oil locked up in various cavities, so that's the 37 litres bit settled. But I'm curious about the two capacities listed.

I could understand it if, for example, the manual said "41 litres standard, but 46 litres with FEL" but there are no such qualifications. Maybe something got lost in the translation from Korean to English?

oosik · Jul 5, 2020

I have a Kubota but have found a similar discrepancy. My tractor Owners manual says 59 quarts. It actually takes 64 quarts to reach the full mark. JMHO - it has something to do with the method the engineers use to determine capacity. Could it be that the hydraulics on the FEL need the added five quarts??