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Once you have a pump bracket, this is a complete list of all the standard hydraulic parts needed to add a basic Live Hydraulics system to your N-tractor. The name at the top of each section below is a link to their on-line catalog.
| Northern Tool | |||
|---|---|---|---|
| MY ITEM | ITEM No. | DESCRIPTION | No.Reqd. |
| 2 | 10562 | Concentric High Pressure Hydraulic Gear Pump 0.097 cu.in. $145 | 1 |
| 2a | Pump Bracket - make or buy | 1 | |
| Surplus Center | |||
| MY ITEM | ITEM No. | DESCRIPTION | No.Reqd. |
| 1 | 13-BX48 | 51" BX V-Belt Type BX48 (for front dist engine only) $12.00 | 1 |
| 1 | 13-BX42 | 45" BX V-Belt Type BX42 (for side dist engine only) $11.00 | 1 |
| 4a | 918-3272 | 3/8" X 72" 3/8 NPTM X 3/8 NPTM 4800 PSI Hyd Hose $18.00 | 1 |
| 4b | 905-1296 | 1/2" X 96" 1/2 NPTM X 1/2 NPTM 3000 PSI Hyd Hose $19.00 | 1 |
| 5 | 9-A3-20-D | 1/2" Single Wire Dual Hydraulic Hose Clamps $4.00 | 3 |
| 3 | 1-BK24-A | 2.45" Dia 1/2" Bore 1-Groove Pulley $6.00 | 1 |
| 6a | 9-1501-8-8 | 1/2 NPTM x 1/2 NPTF 90 Swivel Fitting $4.00 | 1 |
| 6b | 9-6901-6-8 | SAE 6M x 1/2 NPTF 90 Swivel Fitting $5.00 | 1 |
| 6b | 9-6901-6-6 | SAE 6M x 3/8 NPTF 90 Swivel Fitting $5.00 | 1 |
| 6c | 9-6900-5-4 | SAE 5M x 1/4 NPTF Swivel Fitting $4.00 | 1 |
| 6c | 9-1503-4-6 | 1/4 NPTM x 3/8 NPTF 45 Swivel Fitting $3.00 | 1 |
| 6d | 9-7933-6-65 | 3/8" NPT 10 GPM CHECK VALVE 65 PSI CRACKING $20.00 | 1 |
| Local Tractor Supply Store | |||
| 7 | Ford M2C134D | Synthetic Combination Tractor Fluid for Ford 8N Tractor $50 | 5 Gal |
| 8 | 8N8286 | Pre-Bent Lower Radiator Hose for Late 8N $20 | 1 |
| APPROXIMATE TOTAL (includes pump bracket and shipping) | $450 | ||
What follows is a more detailed description of each part with other options that might be substituted in the list above. This current list is based on using 1/2" suction and 3/8" pressure hoses. Other options are described below.
Be careful when buying belts, some manufacturers match the part number to the inside length, others use the outside length. The same basic number from different manufacturers can be 3" longer or shorter! That is why I show inside and outside measurements. The original belt will be too short to go around the extra pulley for the pump. These tractors use a type "B" V-belt that is wider than the typical type "A" 1/2" automotive V-belts. Most "V" belts can be found in 1" length increments, with a few 1/2" size increments. The best belt length depends on the engine type, size pulleys used, and other options like special alternator brackets. My 2N tractor with hydraulic pump and alternator is using a BX48 belt. The belt length is 48" inside (51" outside) measure. My side distributor 8N tractor with hydraulic pump and generator is using a BX42 belt. This belt length is 42" inside (45" outside) measure. These are the sizes listed in the shopping list above. Your tractor may need a slightly longer or shorter belt. Standard type V-belts are smooth on the inside and outside faces. The cogged belts have notches molded on the inside diameter, this makes them much more flexible going around a small pulley. The cogged type is often indicated by "X" in the item number.
Keep your original short V-Belt. I occasionally use the short belt to "turn off" the external pump when it is not needed.
The pump on my 8N is a BARNES-Haldex gear pump
It appears that these pumps are now known as: Concentric GC Series Pumps
Where To Buy:
Northern Tool
You might be able to use a bigger pump if you want to add external valves and remote hydraulics like a modern tractor. However, I don't think it's a good idea to try and do more than 2 GPM with a V-Belt drive. Smaller displacement pumps will also work, the lift will just raise slower.
I am certain any of these model pumps will work:
G1204C3A300N00 Old BARNES-Haldex Model 10561 - 0.065 cu.in. 1.0 GPM @ 3600 pump RPM - SAE #6 9/16-18 Ports
G1206C3A300N00 Old BARNES-Haldex Model 10562 - 0.097 cu.in. 1.5 GPM @ 3600 pump RPM - SAE #6 9/16-18 Ports
G1208C3A300N00 Old BARNES-Haldex Model 10563 - 0.129 cu.in. 2.0 GPM @ 3600 pump RPM - SAE #8 3/4-16 Ports
These are all 4-bolt type 4F17 pumps. Beware the very similar-looking MTE brand pumps. They are good pumps, if you are building a direct-drive hydraulic power unit, but the MTE pump description clearly says they are not intended for side-loading. This is a belt-drive application which definitely has side-loading. There are some 2-bolt type AA pumps that are similar in size and may work.
The pump shaft for these pumps is 1/2" Diameter. My 8N is using a 3" diameter pulley for the type "B" V-Belt, and the 2N has a 2-1/2" diameter pulley.
Where To Buy
www.surpluscenter.com
Item # 1-BK24-A
CAUTION - Both of the pump pulleys mentioned above are smaller than the 5" crank pulley. The hydraulic pump will be turning more RPM than the engine. This means we get a little more fluid flow than if we used a 5" pump pully. Be careful! If you routinely run your engine at higher RPM, you may be overspeeding the hydraulic pump. At 1500 engine RPM a 2-1/2" pump pulley will be turning 3000 RPM. At 2200 engine RPM a 2-1/2" pump pulley will be turning 4400 RPM. These pumps are rated 4000 RPM maximum, so a 2-1/2" pulley is a little small if you like to run your engine flat-out.
The best way to identify inlet and outlet port locations is to turn the pump by hand and check with a thumb over the port. Don't do this with the engine turning the pump or you might lose some skin, and the pump should not be run by the engine without fluid in it. These pumps are reversible, so make sure you are turning the pump the same direction the engine will be turning it. Bump the start button a few times to figure that out. One port will obviously have pressure, while the other is suction. Once you figure out which port is sucking into the pump, hook up your suction hose and turn the pump by hand until fluid comes out the other port. Then hook up your pressure hose and put the belt on.
4a-High Pressure Supply Hose - 6-Foot (72") Length
Hydraulic Hose - 3/8" or 1/2" 2-Wire, 3500 PSI - 1/2" NPT (Male) fittings
Surplus Center, Northern Tool, or Tractor Supply Company.
4b-Suction Hose - 8-Foot (96") Length
Hydraulic Hose - 1/2" 1-Wire, 3000 PSI - 1/2" NPT (Male) fittings
Surplus Center, Northern Tool, or Tractor Supply Company.
Lengths and sizes are suggestions. The suction hose needs to go about 1 foot further than the supply hose to connect to the differential plug. Standard pre-assembled hoses generally come in even numbered foot lengths, and are a lot cheaper than custom-made hoses. I did manage to find one piece 12" long somewhere. Measure the actual routes you want to use. Try to protect the lines. The original, all internal, hydraulic plumbing on these tractors is almost indestructible. The new external hoses could become a maintenance problem if they are loose and get snagged by whatever you happen to be driving thru. The suction hose can be cheaper using a lower quality hose. I use the high pressure hose for durability, and to avoid complicating things with additional hose types.
If you know something about hydraulics, the 1/2" hose size is definitely overkill for the flow rate with premium synthetic M2C134D combination tractor fluid. The inside diameter of the fitting that attaches the pressure hose to the tractor test port is only 5/16". I believe 1/2" hose helps on the suction side and 3/8" hose should work fine on the supply side with any of the three pumps listed above.
My hoses have standard NPTF male ends. NPTF is National Pipe Taper Fuel thread. You must use thread sealant if NPTF connects to NPT or they will not seal. This should only occur where the elbow for the suction line screws into the drain under the differential. NPT is not ideal for hydraulic systems. The fluid power association does not recommend using NPT for hydraulic systems. I use NPTF because it's what I can most easily find, it's certainly strong enough, and it's less expensive. I use the yellow thread sealant for gas systems and have no problem with leaks. DO NOT use the white Teflon plumber's tape! That is for 300 PSI water systems and will not seal hydraulic fluid working at more than 1500 PSI!
Thread sealant is not needed when using any of the swivel or o-ring type fittings. The NPSM swivel fittings make a seal at the inside diameter of the hose end. They do not need any sealant on the threads. You may need to run a reamer in the end of each hose fitting to properly finish the inside diameter. If there's a lump on the inside of the hose fittings they will not seal in the swivel fittings.
These are a must, even if you only use the cheapest 1-hole strap type, use something to secure hoses close to the hard castings of the tractor. Plastic tie wraps will work as a temporary solution until you decide exactly where the hoses should be. These bolt together clamps help even if they are only used to hold the two hoses together. The bolt-together feature can be used to
It is best to find a big chart with pictures of the various fitting types and thread sizes. Sometimes 1/2" means the pipe size, other times it may be referring to the actual thread size. This is very confusing, so test-fit everything. Make sure everything is going to go together, before starting the project.
FITTINGS 101(-1): The abbreviations for fittings are also very confusing. There are many more types than listed here. These are the types most often used for this type of system:
NPT = National Pipe Taper
NPSC = National Pipe Straight Coupling
NPSM = National Pipe Straight Mechanical
NPSF = National Pipe Straight Fuel
NPTF = National Pipe Taper Fuel
SAE O-Ring Boss
National Pipe Taper Fuel (NPTF) is also called Dryseal American National Standard Taper Pipe Thread
Of the types listed here, the first one (NPT) is the only one that always requires thread sealant. NPT is ok for plumbing systems working at less than 300 PSI, but is not recommended for hydraulic or fuel systems. All other types listed above are "dryseal" types that seal when the correct fittings are put together dry. An exception to that is when dryseal NPTF fittings are being re-used. Sealant may be necessary if the threads on either part are less than perfect. Sealant is often recommended for dryseal NPTF fittings to lubricate and prevent galling of the threads as they are tightened. The sealant ensures a leak-proof seal, and makes it much easier to disassemble fittings later. Do not use the white teflon tape. That is for 300 PSI or less water systems. Use a sealant rated for Gas / Fuel systems (yellow color).
1/2 NPTF Male x 1/2 NPSM Female 90 SWIVEL Elbow - One (1) required. This fitting replaces the 1/2" pipe plug under the differential. This is where the suction hose will connect. The elbow used on my 8N is a 3/4" NPTF Male. The pipe plug hole in that tractor must have been drilled out and tapped to the larger size. Maybe some gorilla stripped-out the original threads. Watch for similar non-standard issues on your tractor. Test-fit everything.
Where To Buy
www.surpluscenter.com
Item# 9-1501-8-8
90 degree Swivel Elbow Adapter Fittings to connect hoses to the new pump - Two (2) required. These fittings must match the hoses and pump port and hose sizes. The pump will need SAE 6M (male) or SAE 8M. The hose side will be 3/8" or 1/2" NPTF Female.
Where To Buy
www.surpluscenter.com
Item# 9-6901-6-6, or 9-6901-6-8, or 9-6901-8-8 (two required)
ORB - SAE-05(M) x 3/8" or 1/2" Female Pipe (NPTF) 90 Elbow, 45 Elbow, or straight - One (1) required. This SAE-05 adapter fitting has 1/2"-20 straight thread x (F) PIPE, 3/8" or 1/2" NPT depending on the hose size being used.
Where To Buy
www.surpluscenter.com
Item# 9-6900-5-4 and Item# 9-1503-4-6 One Each.
WARNING These are both straight fittings that will come directly out from the test port. This may be a problem if your tractor has the original exhaust system. If the hose is going to end up too close the the exhaust pipe, I found the following elbow and adapter at www.hoseandfittings.com
Item# 6901-05-04-FG and Item# 5404-06-04 One Each. Please note the different web site for these.
Direct adapters from 1/2"-20 male ORB to 1/2" or 3/8" pipe are hard to find. The ORB SAE-05 male end that we need to fit the test port seems to be an oddball size. Many fitting types skip that size entirely. Try a web search for the following fitting numbers and see what is available: 6900-05-06 (Straight) 6901-05-06 (90 Elbow) 6901-05-06-FG (90 Elbow swivel forged), 6902-05-06 (45 Elbow). One fitting is always better than two or three. Try substituting 05-04 1/4" fitting instead of 05-06.
Even when I can find the correct fitting, the price is often 4 or 5 times what a single fitting should cost. One of the better alternatives is to get the SAE-05(M) to 1/4 NPTF Swivel fitting 6900-5-4 and an adapter to get from 1/4" NPTF to 1/2" NPTF 5405-4-8. The system for my V8-8N is going to use a 3/8" supply hose.
These fittings replace the hex plug at the test port on the tractor's hydraulic pump flange, so you can connect the High Pressure supply hose. Check the test port bolt on your tractor! This is another place that may have been messed with over the years. If someone has used a taper-threaded fitting to plug this port, they may have cracked the aluminum housing.
This is a couple sets of the 6901-05-04 elbow, with a 5404-06-04 adapter. One has the check valve installed. This may be the best combination of fittings to go vertical from the test port and get away from the exhaust pipe. I hadn't given much thought to possible interferance with the exhaust since my tractors all have the vertical muffler adapter.
3/8" NPT 10 GPM CHECK VALVE 65 PSI CRACKING
1/2" NPTF 18 GPM CHECK VALVE 65 PSI CRACKING
Where To Buy
www.surpluscenter.com
Item# 9-7933-6-65 (3/8") or 9-7933-8-65 (1/2")
This check valve will work placed anywhere in the pressure line between the engine pump and the test port on the belly pump. I prefer to put my check valve as close as I can get to the test port on the belly pump. The check valve is needed so the lift will stay up when the engine is switched off. There are no check valves built into the engine-driven pump, so without a check valve, when the engine pump stops, hydraulic pressure will just bleed back through the pump.
I added the item number and description for a 3/8" check valve to work with a 3/8" high pressure hose rather than the 1/2". The smaller version is $5 cheaper and the smaller hose is also less money. Your choice, run 3/8", 1/2" or whatever your research or local expert says will work.
Both of the valve selections above were changed from 5 PSI cracking to 65 PSI cracking. I had some trouble with one of my 5 PSI check valves not wanting to seal. Cracking Pressure is the minimum pressure needed to start flowing. Higher pressure should provide a more positive seal at the expense of making the system slightly harder to pump.
Super Tech Heavy Duty Tractor Hydraulic and Transmission Fluid sold by Walmart ® says right on the label "meets Ford New Holland ESN-M2C134-D specification". This is the right stuff.
The original Ford recommended fluid for the 9N-2N-8N hydraulic sump was "Mild EP Gear Oil conforming to Ford specification M-4864-A and B, SAE 80 below +32 degrees F, and SAE 90 above +32 degrees F". A modern equivalent to this is a mineral oil. Tractor Supply Company Traveler brand GL-1 or NAPA part number 65-205. These mineral oils are usually the least expensive fluids available. These 80 and 90 weight mineral oils are very thick, and can cause sluggish hydraulics when really cold. The mineral oil may cause pump cavitation or may not work at all in this external hydraulic system we are adding.
This last item may already be on your tractor. It's the pre-bent lower radiator hose for the late 8N side distributor tractors. The simple elbow shaped hose used on the front distributor engines does not allow the belt to come out, away from the engine, to run an accessory on the left side. If you are not already using this pre-bent hose, you will need one.
THAT's ALL YOU NEED to have live hydraulics any time the engine is running. The hydraulics now work even when the PTO is disengaged. This is a very basic hydraulic circuit, with no external work ports or valves to run external hydraulics. Almost anything you want can be added, but the more complex the system gets, the more it costs. The basic system is a vast improvement over the original hydraulics, and can often be added for less money than rebuilding a worn-out internal hydraulic pump.
Go to next chapter 4-Hose Routing.
| TABLE OF CONTENTS | |
|---|---|
| CHAPTER | DESCRIPTION |
| 1 | Top of This Page |
| 2 | Engine Driven Pump |
| 3 | Shopping List |
| 4 | Hose Routing |
| 5 | Problems and Options |
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