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  1. Large Frame Compact Utility Tractors (LCUT)
    I have a question about the air ride seat suspension. Does anyone know if the current air ride suspension on my 2013 4320 is the same as the one you can order for the 4044r. I know they updated the part numbers and I cant find any detail drawings to see if there is anything different. old part...
  2. Large Frame Compact Utility Tractors (LCUT)
    Engine starts and idles as it should. When you increase RPMs engine surges and RPMs fluctuates. It will settle down and hold rpm until you start moving and engine is under load and it starts surging again. when its warmed up it will run normally at around 1500 -1800 rpms with slow speed (1/2...
  3. Large Frame Compact Utility Tractors (LCUT)
    First off, searching JD parts, I found a parts diagram/list for 70 Hydraulics - Dual SCV, OOS - ST367760 4720 Compact Utility Tractor - PC9399 > 70 Hydraulics What is … Dual SCV, OOS - ST367760 ? Is this, or please confirm, this means serial number Zero through 367,760 This picture looks...
  4. Large Frame Compact Utility Tractors (LCUT)
    2005, 4720 345hrs, vibration/ high pitch grinding from front while in road gear on pavement 15mph. Seems to get worse when going down a grade and starts to coast. At times it was rather loud and thought I was dragging something. Seemed to go away if I put it in 4wheel drive. Front oil was full...
  5. Large Frame Compact Utility Tractors (LCUT)
    I am trying to replace a rockshaft control lift arm pin (part number M136549). I thought that this would be simple but after removing the pin nut I cannot get the pin out of the arm. I don't want to beat on it to much and break something else but there has to be a simple way to get the pin...
  6. Large Frame Compact Utility Tractors (LCUT)
    I've had this 2011 4320 since 2013 (open station) and only recently needed to use the 3rd SVC. The lever to operate the valve does not move, regardless of the position of the Lock / Unlock lever. It appears that to get under the plastic cover that the operating lever sticks up through to see...
  7. Large Frame Compact Utility Tractors (LCUT)
    I need to have hoses made up to run from the rear quick attach female connectors to a front grapple. What type and size male connector is required to fit the 4720 JD rear QA ports? Is there a preferred brand connector? Also, what hose diameter should be used for this intermittent, low flow...
  8. Hydraulics
    I made my own 4720 3rd function kit with the summit hyd. Valve. Works fine but with one issue! When I engage the electric operated scv my engine bogs down?Grapple operates just fine in both directions just have a drag on the engine. I ran 3/8" hoses from solenoid scv to front of tractor. I...
  9. Large Frame Compact Utility Tractors (LCUT)
    I recently bought a 2008 4720 cab with 900 hours. I am having a recurring problem with the pto. It came with a mid mount mower. Every time I mow with either the mid mount 6' mower or my 7' brush hog, after about 20 mins of mowing and I disengage the mower (pushing the yellow switch), the pto...
  10. Large Frame Compact Utility Tractors (LCUT)
    Hey guys, I'm new here and only just qualified to be a bonafide member. I am the proud new owner of a shiny new"ish" 4720. I got it from a dealership that had used it for demos and rented it out a bit. I got it with a brand new loader and box blade, and they detailed it up to look as good as...
  11. Large Frame Compact Utility Tractors (LCUT)
    Hi, i have a 4720 that continues to lose power and eventually stalls and is then very hard to start. A dealer told me it was bad fuel causing rust in the lines clogging everything. This has happend three times over the past two years and now again. They have drained the tank, lines new...
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