2305 MMM question

[Foxtrot08]

I've gone into some older topics and read about some issues with the 2305 62in MMM. I have the 'independent' lift, I bought the tractor 'used' with about 100 hours on it, so I didn't have much of a choice on it.

My question on it is sort of several parts.

1. Locked into the 'up' position, how far should the bottom of the mower (preferably the edge) be off the ground? Or if so, tip of the blade? I don't have the JD measuring gauge, so I'm attempting to just use a regular measuring tape.


2. Is it normal, in the locked position, for the mower to drop an inch or so from the max height? Really annoying when doing some loader work around/in the barn it drops that much - I thought it'd be higher. But I guess I'll just get used to taking it off, just as I take the loader off to mow the grass.


3. What are some signs that the adjustment knob is broken/not showing the correct position? highest setting doesn't seem that high for grass..


Thanks for the help!

Oh, PS. Not MMM quesitons:

- How much is the normal retail of a 260 backhoe for it? Also what all needs to be done to have it installed?

 

[jsb2b]

I've gone into some older topics and read about some issues with the 2305 62in MMM. I have the 'independent' lift, I bought the tractor 'used' with about 100 hours on it, so I didn't have much of a choice on it.

My question on it is sort of several parts.

1. Locked into the 'up' position, how far should the bottom of the mower (preferably the edge) be off the ground? Or if so, tip of the blade? I don't have the JD measuring gauge, so I'm attempting to just use a regular measuring tape.
Blade tip is about 4 1/2"- 5" when arrow is pointing to line between Lock and Install.

2. Is it normal, in the locked position, for the mower to drop an inch or so from the max height? Really annoying when doing some loader work around/in the barn it drops that much - I thought it'd be higher. But I guess I'll just get used to taking it off, just as I take the loader off to mow the grass.
Yes.

3. What are some signs that the adjustment knob is broken/not showing the correct position? highest setting doesn't seem that high for grass..
Highest position is line between Lock and Install. Operator's manual shows you how to adjust the 2 lift turnbuckles. On mine, 3" at blade tip is 4 green spikes clockwise from H. Knob and decal are not accurate.

Thanks for the help!

Oh, PS. Not MMM quesitons:

- How much is the normal retail of a 260 backhoe for it? Also what all needs to be done to have it installed?

Don't know. To have it installed just takes $.

 

[HunterWare]

There are some old posts on this that I didn't fully understand until I got my MMM installed. I would search around regarding MMM lift arm adjustment and such, but here is what I figured out.

I have two things that I can adjust: 1) being the linkage between the lift mechanism and the lift rod, and 2) being the hanger clips holding up the lift arms. The first trick was to make sure that I have just enough clearance with 1) to be able to reliably spin the knob when fully lifted, but no more. Any extra clearance on 1) becomes that extra fall you see when you put the mower into locked position and let lift down.

After that you want to make sure that you adjust 2) so that you have just 2 mm of clearance between the lift arms and the frame when at full lift. With 2) any extra gaps correspond to lowered lift heights all through the range. Once I got it all setup I had over 4.5" blades clearance at max height (first step past locked position), but it took a while...

 

[Gator6x4]

The "independent hydraulic lift" does not have Pilot Valves. It will leak down as you are using. Remove the mower and the mower left arms will also leak or fall down. John Deere sells a pricey retaining kit to keep the mower lift arms up when the mower has been removed. Most people secure the mower lift arms with bungee cords. The mower lock position leaves a lot to be desired. It will not lock and hold the mower in the fully raised position.

 

[megotatractor]

I've gone into some older topics and read about some issues with the 2305 62in MMM. I have the 'independent' lift, I bought the tractor 'used' with about 100 hours on it, so I didn't have much of a choice on it.

My question on it is sort of several parts.

1. Locked into the 'up' position, how far should the bottom of the mower (preferably the edge) be off the ground? Or if so, tip of the blade? I don't have the JD measuring gauge, so I'm attempting to just use a regular measuring tape.


2. Is it normal, in the locked position, for the mower to drop an inch or so from the max height? Really annoying when doing some loader work around/in the barn it drops that much - I thought it'd be higher. But I guess I'll just get used to taking it off, just as I take the loader off to mow the grass.


3. What are some signs that the adjustment knob is broken/not showing the correct position? highest setting doesn't seem that high for grass..


Thanks for the help!

Oh, PS. Not MMM quesitons:

- How much is the normal retail of a 260 backhoe for it? Also what all needs to be done to have it installed?

1 fully raised the mower is only about 4 or 5 inches off the ground
2 yes
3 the numbers on the adjustment knob don't mean anything anyways, just a guide so you can set it the same every time you mow.

 

[Steveb05]

The "independent hydraulic lift" does not have Pilot Valves. It will leak down as you are using. Remove the mower and the mower left arms will also leak or fall down. John Deere sells a pricey retaining kit to keep the mower lift arms up when the mower has been removed. Most people secure the mower lift arms with bungee cords. The mower lock position leaves a lot to be desired. It will not lock and hold the mower in the fully raised position.

I have the Independent lift on mine. I rotate the height adjustment knob to the lock position to hold up the arms when the deck is off. I have never had to use bungee cords to hold up the arms.

 

[thatguy]

Not a 2305 owner, but a 2320 owner.. does the 2305 use the same knob/control height design as the 2320?

IF the 2320 and 2305 have the same design keep reading, The height control knob should turn 360 without hitting anything.. When the 3pt/mmm are probably adjusted and the knob is turned so it is in the lock position the mower should also drop very little..

If when the knob is turned it hits the cam (that had the indents to control the height) the mower is not raising up far enough for the 'ear' on the mounting frame to miss the cam at its biggest position (lock). If you crawl underneath (mmm removed - tractor off) you can see how the 3pt hitch and MMM height control interact

My mower now drops only 1/4" or so when locked up. When it was NOT adjusted correctly it would drop several inches in the locked position

brian

 

[HunterWare]

That was my experience... Once I spent the time crawling underneath (thank god for ramps and crawlers) and tuned the setup (re-reading the instructions 5 times to finally fully understand it all) thing improved greatly. I went from a large drop in locked position and settings being 3 inches below the stated values to almost no drop and being within an inch of what's advertised.

 

[texas42]

I have a 2320 with 62D MMM and independent lift kit.
When my mower is fully raised and the knob in the "locked" position my deck drops only 1/8 to 1/4 of an inch when the hydraulic pressure is released.
When in the fully raised "locked" position my mowing height is exactly 6 inches (blade tip to floor)

 

[thatguy]

Here is a chart that shows how the items used on the 2320 'mechanical' lift work..

The 'ear' between part # 11 & 12 is what contacts the cam (#5) to adjust the cutting height. When the ear hits the cam a the widest part that is the 'lock' position.

I did 2 things to get mine working correctly

1) I adjusted the turnbuckles (not shown in the diagram, but connect to part #25) on the mmm lift frame so there were at the highest position possible and still allow me to drive over the mower and still hook up.

2) then turned part #23/21 to make it shorter - this allowed the 3pt to lift the entire mounting assembly higher. 23/21 connects to #9, which is pulled back farther, which causes the 'ear' to rotate toward the back more (and hopefully clearing the cam)

I was still about 1/8" of the ear clearing the cam after adjusting #23/21 - BUT i found if i temporarily raised the 3pt higher than the normal 'high' position (you can hear a pressure relief valve kick in) the ear would clear the cam enough to lock it up correctlym then i returned the 3pt lever to its normal high position.

3) I also found that my knob markings were 180 degrees from the decal - so i used a black marker to color the factory markings and then used a sticker to mark the correct position in relation to my decal

brian