MT 23 Gear oil

Pochie

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Joined
Apr 16, 2012
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2013 Mower purchased new. The gearbox oil fill/check tube for the PTO I understand, have drained and replaced at 100 hours. The deck drive gearboxes I check yearly and understand. In greasing today, after many times I saw a label on the machine under(near) the battery area. There is a Allen screw that says to take out to check oil level (80-90w). What is this oil for gears in the engine? Transmission? I cannot find info in the manual. Anyway, I cannot budge the allen screw to check it anyway. I have 350 hours on in 9 seasons. I assume it is factory filled and doesn't need checked? Thanks for any input. Pochie
 
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