UOA Kubota RTV900

[Blinker Fluid]

Here is a UOA from our yard's RTV900 (2400 hours total). Does anyone know how the silicon is so high without causing excess wear? Any additional feedback would be appreciated.
I did a VOA when we switched to Citgard 700 and the additives are slightly different, but I assume this could be caused by the previous oil.
Citgard 700 VOA https://bobistheoilguy.com/forums/threads/citgo-citgard-700-15w40-voa.382260/

 

[cptbarkey]

For the silicon, check the air intake and air filter for leaks. That is not an extremely high level but it probably is causing some wear. Love Kubotas myself. Thanks for sharing.

 

[Creekside]

The little filter housings don't seal up perfectly especially with some aftermarket filters. Plus that could be a fluke reading, it happens sometimes. I would make sure all the clamps are tight in the intake system and that the filter and housing are in good shape and only worry about it if it becomes a trend.

PS: DO NOT overheat that thing. The cylinder walls won't take it and WILL crack. Mine is currently waiting on a replacement engine. Local mechanic had one that was cooked too.

 

[Blinker Fluid]

The little filter housings don't seal up perfectly especially with some aftermarket filters. Plus that could be a fluke reading, it happens sometimes. I would make sure all the clamps are tight in the intake system and that the filter and housing are in good shape and only worry about it if it becomes a trend.

PS: DO NOT overheat that thing. The cylinder walls won't take it and WILL crack. Mine is currently waiting on a replacement engine. Local mechanic had one that was cooked too.

Oh my, the temp gauge actually stopped working this year. I better get it fixed lol

 

[fantastic]

Seems acceptable for the hours. Do any work on the engine? The silicon is higher.

 

[Blinker Fluid]

Seems acceptable for the hours. Do any work on the engine? The silicon is higher.

No work on the engine. I understand that silicon can come from dust and gasket maker, are there any other common sources?

 

[fantastic]

No work on the engine. I understand that silicon can come from dust and gasket maker, are there any other common sources?

Well that VOA only shows 5 ppm. That would be the only other common source is in the oil itself so it appears this is an external source. Either from air engine material. I'd just keep testing and see which way it goes from here. Thanks for sharing

 

[burbguy82]

Love Kubotas myself

there is no better.

 

[The motor guy]

isn't 180hrs a long interval for one of those? I guess it is a diesel. My side by side calls for an oil change like every 50hrs max and there are people who do it like every 25hrs I think.

 

[dlundblad]

isn't 180hrs a long interval for one of those? I guess it is a diesel. My side by side calls for an oil change like every 50hrs max and there are people who do it like every 25hrs I think.

My zero turn with the D1105 (same engine used in other RTV’s) calls for a 200 hr OCI. My tractor with the D1703 calls for a 400 hr OCI. The 400 hr OCI is especially too long for me. Lol.

I am curious if the RTV has a different OCI than a mower. One would think it would.

 

[burbguy82]

My zero turn with the D1105 (same engine used in other RTV’s) calls for a 200 hr OCI. My tractor with the D1703 calls for a 400 hr OCI. The 400 hr OCI is especially too long for me. Lol.

I am curious if the RTV has a different OCI than a mower. One would think it would.

If most are like me, I use my RTV for short periods of time, mostly not allowing full warmups......and by I I mean my wife. I think the RTV OCI reflect this usage.

I think it is.

 

[The motor guy]

My zero turn with the D1105 (same engine used in other RTV’s) calls for a 200 hr OCI. My tractor with the D1703 calls for a 400 hr OCI. The 400 hr OCI is especially too long for me. Lol.

I am curious if the RTV has a different OCI than a mower. One would think it would.

You have the L2501? Same here. Supposedly it used to be 200hrs and they upped it to 400. I think the sump holds 6qts if I remember right. I think I'm going to do 200hrs regardless.

 

[Blinker Fluid]

The WSM I have lists a 100hr OCI. Our machine is typically used all day and gets to operating temp. Maybe I'll try 150hrs and see how it goes.

 

[dlundblad]

You have the L2501? Same here. Supposedly it used to be 200hrs and they upped it to 400. I think the sump holds 6qts if I remember right. I think I'm going to do 200hrs regardless.

Yessir. On paper it says 6, but 5.5 is about right on the dipstick.

 

[cptbarkey]

isn't 180hrs a long interval for one of those? I guess it is a diesel. My side by side calls for an oil change like every 50hrs max and there are people who do it like every 25hrs I think.

No. 200 is typical for conventional, 500 for synthetic. Gas engine 50-100.