[sbtcabman]

gm,

need some help diagnosing intermittent "chattering" of front deck. hose starts vibrating and jumping. fluid level fine. self corrects in a few minutes but doesn't seem like a good thing:help:

appreciate any suggestions other than $125/hr at local dealer who I pay to learn about this machine cuz mine is the only one they have seen since there are just farms and not large lawns around here...'cept mine.

kindest thanks for insight.

steve

 

[Mark / Ohio]

Only the front deck has the problem, the side mowers don't do it?

If so, any way to temporarily plumb one of the side decks into the hydro lines for the front? That would narrow it down between a problem with the front deck hydro motors or further upstream going back to the control valves and the pump.

 

[sbtcabman]

interesting thought

mark,

only front deck has the issue.

symptom reminds me of air in the line when you change a pipe or filter in a plumbing system. air gets introduced and until it is vacated the systems "hammers".

your suggestion would be interesting but probably cost about $200 for the special length hose that one would need to be made up to try that connection.

these are semi rare beasts and hopefully another grasser may have more insight.

thanks for the thought! very intuitive!

steve

 

[Mark / Ohio]

...symptom reminds me of air in the line when you change a pipe or filter in a plumbing system. air gets introduced and until it is vacated the systems "hammers".

I was entertaining that thought as well. But I can't come up with a way air could get into the system, only affect the front mower and further not leave a puddle of oil someplace around a fitting, hydro motor or hose. My only other thought would be if there is a bad valve, maybe a high pressure bypass or something in line or part of one of the hydro motors on the front deck that could cause it? Just doing some more brain storming.

these are semi rare beasts and hopefully another grasser may have more insight...

I don't recall that I've ever saw one in person myself. Local parks department has a similar mower but it is an older Jacobsen. Zero turns and larger CUT & AG tractors with pull behind finish mowers are much more common here locally. You might try a post over at MTF if you have not done so already and see if anyone might be able to help over there.