New Holland 3930

Frank Dodson · Guest Report to Moderator

Yesterday I was cutting thick blackberry brambles and thick weeds and I noticed the transmission/hydraulics overheating. Oil levels were fine. It has a remote valve controlled by one lever. It appears the lever has three positions up/float/down. I know if the lever is left up the oil could deadhead and cause heat build up. The lever was in the down position and I am wondering if this could cause deadheading too. By tne way, the rotary cutter is a 3-point model and there was nothing hooked to the remote. Do any of you have other suggestions as to what would make it overhead and what damage could the overheading cause? Thanks for any help you can give. The tractor has 970 hours on it.

keh · Posted: Mon Aug 24, 2009 4:14 am Post subject: Re: New Holland 3930

On some tractors a clogged hydraulic oil filter will cause overheating.

KEH

RodinNS · Posted: Mon Aug 24, 2009 4:34 am Post subject: Re: New Holland 3930

If it was in the lower posiion, then it's deadheading.... and dumping full pump flow across the relief valves at 2500 psi. That will ruin a pump fairly quickly....
Make sure the valve linkage is free so that the valve kicks ou on it's own. If that doesn't do it, look at the back of the valve near the top. There is a set scre and a jamb nut. Loosen the jamb nut and back the set screw out 1/2 a turn at a time until the valve will kick out at idle when the oil is warm.
If you don't want to do that, pay attention to the valve handles and listen more closely to the engine laboring... otherwise it's going to soon cost you some serious money.

Rod

Blue Buddy · Regular Joined: 18 Jun 2007 Posts: 63 Report to Moderator

i assume yu have one lever remote under the seat? if so, it has 3 positions, lift, neutral, lower,,
lowering and lift both have pressure, so it must be in neutral when not being used for work

Frank Dodson · Posted: Sat Sep 19, 2009 6:00 am Post subject: Re: New Holland 3930

Bluebuddy

You were exactly correct. The level on my 3930 is at the back of the seat(I have 2 outlets). Someone(maybe me) had pushed the level to the down position. I had a mechanic check it out and apparently no damage done. There is a small leak around the tranmission drain hole and I will repair it this winter. I cut heavy brush all last weekend w/o any problem. On another subject, I am pulling a 6 ft. medium duty 3pt. rotary cutter on steep ground. How do you think the 3930 4wd would handle a 7 ft. 3 pt.

Blue Buddy · Regular Joined: 18 Jun 2007 Posts: 63 Report to Moderator

well, basically, if you are not having any trouble with the one yu have you could step up, with the 4wd it should still have enough front weight to be stable, weights can always be added if needed, the limiting factor is what your cutting and how fast you wish to travel, I assume you are talking still just a single hub design for 7 feet, and that extra 6 inches on each end will need some more horsepower to drive for sure if your in a heavy crop, in a light crop it should be Ok, but if in actual brush, I would say stay with the 6 footer