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The main shaft seal and the O-ring behind the main shaft case have been changed. I got the L355SS back together and refilled the power steering and transmission fluids. I drove it around the house off and on for the first day and worked all the air out of the systems. Today I used the rotary...

This is a follow up from my original post. The leaking has increased over the last couple of years. Originally it only leaked during cold weather, but now it's dripping fairly steady through the warm months. I topped off my engine oil and hydraulic fluid and used the rotary cutter for a...

I realized I never followed up on this thread. I apologize. I had a talented friend come over and look at the tractor last December. I was headed to Florida the first week of January for a few months and he was going to split the tractor while I was away. The hydraulic fluid was leaking out...

I was hoping the steering was the cause of my leak, but it seems unlikely. I couldn't see how a leak from the steering could find it's way to the flywheel housing. It appears the L345 and L355 are substantial different due to the Shuttle Shift. On the L355, a steering leak will run right...

I'll be looking at this again tomorrow. There is a small amount of hydraulic fluid on top of the flywheel housing around the Shuttle Control Valve (for the shuttle shift). It no where matched the fluid coming out the bottom, but I'll take a deeper look.

I've been going through the workshop manual. It looks like if I'm lucky, its the main shaft seal, unlucky if it's the hydraulic manifold (or worse). Since the blind plugs were removed, I knew about the problem immediately. If they'd been in, oil would have filled the housing and it would have...

As I was clearing some snow with my L355 Shuttle Shift, I noticed some fluid drops in the snow. Within the few minutes it took me to get back to the point where I could take a look at the leak, it was a slow stream. I'm fairly certain it's hydraulic fluid and not engine oil coming from the...