2N wont pick up 5 foot brush hog

scooter4

Member
Good evening,
I just got a 2N running that I rebuilt the engine was apart when I got it.
It came with a 5 foot Big Bee brush hog and will not lift it. It tries to lift it, but will not get the tail wheel off the ground.
I have not tried revving the engine up since I did not know if that mower is too heavy and did not want to damage the lift.

The tractor has been resold a couple of times with the engine apart and the history of if there is a problem with the lift, or if it ever lifted that mower is gone.
Any advice will be much appreciated.
Thank you,
Scooter
 
Take side cover at right heel off and look inside while trying to lift the
hog--determine where you are leaking fluid..% ft hog is correct size for
the N and ahould be a piece of cake to lift..
 
You obviously have some issues going on, probably a worn,leaking cylinder and/or bad pump, but fist tests will determine where to start. Will it lift without a load? Will it raise up other implements? Raise it up, best to do this with a load though, leave it up, shut engine down. Observe if and how long it takes for the arms to drop down. If within minutes or hours or a day, system is worn and needs attention. A good lift will sustain a load in the up position for weeks. Once lift is up, remove side cover inspection plates and grab your trusty Mini-Mag and look up inside under the cover where the cylinder is bolted to. Look close for oil oozing down/out. That indicates a worn cylinder and it and the piston need replacing. Once you get hat far, report back and we'll tell you what to do next. BTW, what color is the oil? Is it a murky brown shade? If so it is contaminated with water. Hydraulic oil should be a nice clear, honey-like shade.

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"I have not tried revving the engine up since I did not know if that mower is too heavy and did not want to damage the lift."
I would try increasing the RPM and see if it lifts.
 
(quoted from post at 05:53:12 08/31/17) "I have not tried revving the engine up since I did not know if that mower is too heavy and did not want to damage the lift."
I would try increasing the RPM and see if it lifts.

I don't think there is any 5 foot mower that's too heavy for the "N" to lift. The problem is your hydraulics. Do the inspection as suggested above.
 
Thank you everyone for the replies.
I will start checking the system as soon as I can and let you know what I find.
Thank you,
Scooter
 
(quoted from post at 13:34:23 08/31/17)
(quoted from post at 05:53:12 08/31/17) "I have not tried revving the engine up since I did not know if that mower is too heavy and did not want to damage the lift."
I would try increasing the RPM and see if it lifts.

I don't think there is any 5 foot mower that's too heavy for the "N" to lift. The problem is your hydraulics. Do the inspection as suggested above.

my ancient howse, with its armor-plate deck, is right at the borderline of too heavy for the N. but it is NOT too heavy for the hydraulics, which will cheerfully pick the nose of the N up off the ground if more than one mosquito lands on the deck at the same time.
 
Good evening,
I just finished performing the tests and the cylinder needs rebuilt. I drained the oil below the pto shaft and oil spews out the pump relief, so I probably need to replace that.

The pump hammers (or some other part) when I load it up and I am wondering if that is because of the relief or does that happen when pumps are worn?

I also noticed oil squirting upwards in pulses toward the right inspection cover. Is that a worn piston or valve part on that side?
I am draining the all of the oil right now and will pull the cylinder tonight.
Also want to mention the oil was new in case anyone wonders.

I have watched some videos and read previous posts but any advise will be much appreciated especially regarding the pump hammering.
Thank you,
Scooter
 
Good afternoon,
I have everything apart and the cam blocks and eccentric fit well. The pto bushing has .006 clearance.
I could not find a spec for the pistons, but they measure .7995 and .800, the chamber cylinders measure about .804.

I notice the chamber gaskets YT sells have an ending year of 1942, but it looks like all years used gaskets. Any advice on that?
The chamber valves look good, but the relief seat could use reseated. Is there a tool sold for that or way to do it?

Please let me know.
Thanks,
Scooter
 
Good afternoon,
Everything is back together and seems to work well. It lifts the brush hog right up.
It took a long time to clean the oil sludge out of the pump and differential cavities.

I only replaced the relief/ check assembly, pto bushing and gaskets. The gaskets all fit even though I had a question about the years shown for the valve chamber gaskets.

I also had a question about the relief seat surface that should have meant check valve surface. I lapped in the new check valve by removing it from the new assembly and sticking it in a small tubing then using fine lapping compound. I checked it by blowing on the ports and sealing one of them.
 
(quoted from post at 13:50:50 09/22/17) Good afternoon,
Everything is back together and seems to work well. It lifts the brush hog right up.
It took a long time to clean the oil sludge out of the pump and differential cavities.

I only replaced the relief/ check assembly, pto bushing and gaskets. The gaskets all fit even though I had a question about the years shown for the valve chamber gaskets.

I also had a question about the relief seat surface that should have meant check valve surface. I lapped in the new check valve by removing it from the new assembly and sticking it in a small tubing then using fine lapping compound. I checked it by blowing on the ports and sealing one of them.

Congrats. Feels good when you come to a successful end of a job like that doesn't it? :wink:
 

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