ZT Mower decks: Parallel linkage?

[boris317]

It looks like all models of Kubota ZTs have their decks attached with this "parallel linkage" system. I assume this has something to do with the easy deck adjustment dial? It feels like this linkage would be "weaker" than a simple chain hung deck. I am particularly interested in linkage on the z100 series. Could this linkage be damaged or bent easily by bumping into stuff?

 

[mechanic mark]

Kubota's are tough machines.

 

[Ragnar4841]

It looks like all models of Kubota ZTs have their decks attached with this "parallel linkage" system. I assume this has something to do with the easy deck adjustment dial? It feels like this linkage would be "weaker" than a simple chain hung deck. I am particularly interested in linkage on the z100 series. Could this linkage be damaged or bent easily by bumping into stuff?

I've bumped a few things--no problems with bent linkages so far.

 

[djdicetn]

It looks like all models of Kubota ZTs have their decks attached with this "parallel linkage" system. I assume this has something to do with the easy deck adjustment dial? It feels like this linkage would be "weaker" than a simple chain hung deck. I am particularly interested in linkage on the z100 series. Could this linkage be damaged or bent easily by bumping into stuff?

Historically, the chain-hung decks have dominated the upper Commercial duty ZTR's across brands. I too preferred them because they were time tested for durability and provided a truly "floating deck design" that prevented scalping on uneven terrain. Much to my disappointment, Gravely introduced a new "dogbone style drag link" on a few of their 2014 models(the top-of-the-line Pro-Turn 400XDZ and the Pro-Turn 100 XDZ like I own). In their 2014 Product Manual, under a picture of the deck suspension system titled "MOST DURABLE" they simply state.....:The dogbone style drag links don't wear like chains do, making the deck easier to level and keep level". The instructions in my Owner Manual for adjusting the deck(my 2012 has the chain-hung X-Factor deck) and looking at the deck...it is VERY easy to adjust the front or rear of the deck when leveling it. Mine only has about 56 hours on it, but I just checked my deck when I added a striping kit and the deck is still perfectly level. IMHO, I'm glad I got mine before they changed to the "dogbone link". I also wonder(plan on asking my dealer) why they only introduced this new deck hanging system on "a few" models and not "all" models(most of the other Commercials all the way down to the ZT HD Residential still have chain-hung decks). I used to view the "parallel linkage" type systems(like on the Kubotas) as inferior to a chain-hung deck......but there may be a trend(like with Gravely) to shift to other deck hanging systems using the links. When we see Hustler, Scag, Bobcat and others going away from the chain-hung deck systems I guess that will indicate that to be true.

 

[jekjr]

I will try to remember to look at one close next time I go by the dealer. If it is the same type as the 200 and 300 series it is not young to give you a problem. I have a ZG222 with 350 hours and a ZD326 with over 500 hours and they have been abused and there has been no problem. Kubota's are like null dozier so they are tough.