2014 New Holland Boomer 37 Hydraulic v Hydrostatic Oil

Skybird12209 · Sep 21, 2020

Okay folks, a newbie tractor owner here. It seems that the more I "learn" the more questions I have! I have the owners manual for this 2014 NH Boomer 37, but it is not well written and leads to more confusion, so I am coming here in the hopes someone can explain it to me!

I changed the motor oil this weekend. It was pretty easy, found the drain plug and oil came rushing out, and the filter was sort of difficult to come off, but I got it off.

While under the tractor I noticed two cylinders; a black one that was horizontal and on the right side under the platform. Another white one was on the left and was hanging vertical.

A bit of research tells me that one is a "hydrostatic oil filter" and the other one a "hydraulic oil filter" but what I don't see is where these are drained when it comes to changing the oil which is a few hundred hours away. But, the NH Operator's manual says I should change the filters at 300 hours. I am at 262 hours now.Where is the filler plug for these when I lose oil when I just change the filters without a full drain. I see a dipstick in the rear of the tractor near the PTO shaft. Is that where the oil is put in? If not, where?

Questions:

Is the oil for both the same? In other words, when I add oil does it satisfy both filters or are there separate filler plugs, one for each one?

Is there one drain plug for both filters? If not, where are they individually? The manual is not clear about that.

Thanks for any guidance.

George Santulli

neverfailyou · Sep 21, 2020

Don’t know your tractor but on my LS, the hydraulic filter is an overall oil filter for the hydraulic system (loader, 3pt, steering, remote connections etc) and the hydrostatic filter is for the hydrostatic transmission (HST). The HST uses the same oil and is part of the hydraulic system. My understanding is that the HST
Filter is a smaller micro particulate rated filter just before the transmission. (It costs substantially more that the overall filter).
Hope this is correct in concept and that it helps your understanding.

Skybird12209 · Sep 21, 2020

Thanks for your help. I am still not clear about where they are drained and refilled. Hoping that I get more replies. From your note, I see at least what each filter does and that is a help. Have a great day. George

K5lwq · Sep 22, 2020

I do not know your tractor either but there should be a plug under the transmission that will drain the fluid. You should get a owners manual for your tractor as it will show you where these plugs are.

Also there is usually 14 gallons or more fluid in a tractor so you need to make sure you have several drain pans.

You can fill where the dipstick is on the rear of the tractor. Sometimes there is a separate place to fill that is easier access.

Skybird12209 · Sep 22, 2020

thanks K5! I did manage to unscrew the dipstick on the rear of the NH. It does seem like it could take a funnel. I also do have the official NH Owners Manual which has some maintenance information but it is not clear. I did not find the location of the drain plug but assume it a big one, maybe 1 1/16 socket. NH seems to put a dab of white paint on plugs. But what is confusing is that the manual clearly says the filters should be changed at 300 hours but fluid at 600 hours. Seems to me it should have lined up, but if I change the filters at 300 hours, which is about 31 more hours, I guess I will add some of the fluid lost from taking the filter off. But maybe I will just do a complete filter and oil change at 300 hours. That would not hurt, right? When I change oil in my cars, I always change the filter at the same time.

14 gallons? Wow..is that because the fluid serves both the hydrostatic and hydraulic filters? And is the 14 gallons all the same type of fluid? My manual seems to indicate a need of Hypoid 134 oil, but from memory, I thought I saw mention of 8.5 gallons. That is why I am confused. If it mentions 8.5 gallons, one for the hydraulic and one for the hydrostatic, it makes me think there are two filler ports.

I live in western Loudoun County, VA about 70 miles west of DC. I understand that there is a NH dealer in Hagerstown, MD who may do home service calls. I may just bite the bullet and have them do this service....once....to see what they do unless I get enough info to do it myself.

I do appreciate all suggestions and info!! It is nice to have this level of support from folks who take the time to reach out.

WranglerX · Sep 22, 2020

HST and Hydraulics capacity will depend a lot on tractor size... MY SCUT only take about 4 gallons of hydraulic fluid, as opposed to my log splitter which takes about 7 gallons...

Dale

RustyA · Sep 22, 2020

Purpose of filter change is to prevent filters clogging up with debris and making hydraulic pump work hard and build heat. When I changed filters after break in on my Boomer I worked fast swapping them. Dealer suggested having one gallon of ambra on hand to top off after changing both filters. Well tractor must have been a couple quarts underfilled from new. One gallon wasn't enough. Be sure to check level with 3 point and loader down. Some people put shop vac on fill port to minimize draining.

CoyPatton · Sep 24, 2020

You sound as though you are into do as much as possible yourself on your tractor, but lack much knowledge of tractors.
1) go for it!
But more importantly, invest in a service manual for your tractor. It will contain much more detailed information than the owners manual for the actual details of working on it.
If you are into the in depth mechanical aspects of repairs, get a parts manual if you can. It will allow you to id parts and find part numbers (however part numbers are subject to frequent change, even from the time of printing to the build of your tractor if it has a long run of production).

KRBrouwer · Sep 28, 2020

Skybird12209 said:
Okay folks, a newbie tractor owner here. It seems that the more I "learn" the more questions I have! I have the owners manual for this 2014 NH Boomer 37, but it is not well written and leads to more confusion, so I am coming here in the hopes someone can explain it to me!

I changed the motor oil this weekend. It was pretty easy, found the drain plug and oil came rushing out, and the filter was sort of difficult to come off, but I got it off.

While under the tractor I noticed two cylinders; a black one that was horizontal and on the right side under the platform. Another white one was on the left and was hanging vertical.

A bit of research tells me that one is a "hydrostatic oil filter" and the other one a "hydraulic oil filter" but what I don't see is where these are drained when it comes to changing the oil which is a few hundred hours away. But, the NH Operator's manual says I should change the filters at 300 hours. I am at 262 hours now.Where is the filler plug for these when I lose oil when I just change the filters without a full drain. I see a dipstick in the rear of the tractor near the PTO shaft. Is that where the oil is put in? If not, where?

Questions:

Is the oil for both the same? In other words, when I add oil does it satisfy both filters or are there separate filler plugs, one for each one?

Is there one drain plug for both filters? If not, where are they individually? The manual is not clear about that.

Thanks for any guidance.

George Santulli

Hi George: I have a 2008 35 hp boomer tractor, which is an earlier model of yours. You have 2 filters for the hydraulic fluid, one for the hydraulics, and one for the hydrostatic transmission. There are 2 drain plugs to drain the hydraulic fluid, one close to the transmission, and one further back on the tractor (both on the bottom). Be sure to unscrew the filler cap (mine is behind the seat) or the oil will drain very slowly. Mine takes 8.2 gallons of hydraulic fluid to refill. Good Luck,

Ken Brouwer