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Engine
- 15-40wt Diesel engine oil
Transmission/Hydraulic reservoir
- sold under many names like -JD303, HyTrans, J10A, J14A, J20A,B,C,D, J27A or a host of other #'s. They will all say "Universal" or "Hydraulic/Transmission" oil.
UPDATE- There are a couple of very well respected Yanmar dealers that have been using Dextron ATF for over a decade with great success- though it has never been recommended in any Yanmar publication that we have found. It should work fine but use at your own risk
Ft Axle (4wd)
-90wt Gear Oil, 80/90 Gear oil. Really anything that says "gear oil".
Steering Gear Box
- 90wt Gear Oil or similar
Coolant (tractors With Water Pump)
-50/50 any type antifreeze
Coolant (no water pump)
-no more than 20% antifreeze in the summer
Grease Zerks
- any good gun grease
Fuel-
Any blend of diesel that you can buy from a gas station.
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YANMAR HYDRAULIC FILTER SERVICE
INTERVAL - 250 HOURS/EVERY YEAR
TIME REQUIRED -20 MINUTES
Yanmar uses 1 reservoir for both the hydraulic oil and the transmission oil. This oil is a Hydraulic Transmission oil. Never use a simple Hydraulic oil.
The hydraulic pump on all yanmar tractors is very simple. It is basically two gears running together at high speeds to move the oil. These gears must have extremely tight tolerences in order for this to work. Because of these tight tolerences, and dirt or debris will almost always destroy a pump.
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Because of this, it is important that your oil be clean and your filter or screen be serviced periodically. Not all Yanmar tractors have hydraulic filters. In fact only the '20 series, '02 series, some of the F and Fx series gray market, and some of the US versions have a spin on filter. Most have small tubular screens inside the transmission housing that filter the oil.
If your tractor has a spin on filter, replacement is a breeze.
1 - Be sure that you have a replacement filter on hand. These are not filters that you will find at a local parts store. Please check our sponsors for a replacement hydraulic filters.
2 - Using a filter wrench or channel lock plyers, remove the oil filter. As the oil is draining out of the filter housing, remove the drain plug. This is located just below the rear axles. There may be two or more plugs that you will need to remove in order to get all of the oil drained. Use a large drain pan as it may hold many gallons.
3- If your tractor has the screen type filter, after the oil has drained, locate the screen. The screen will always be in the transmission housing. It will usually be on the directly on the opposite side of the large hydraulic suction line that goes into the right (sitting on the seat) side of the transmission. You will need to remove a 2-4 bolt plate that holds this filter in. The filter may also be directly behind the large suction line. To remove this filter you will need to remove the rubber hose connection thatcouples the two sections of steel hyd line together. Then remove the 3-4 bolt plate where the line goes into the transmission. The screen will be behind that plate. If the screen is in none of these places, it will be behind a 2-3 bolt plate at the very botton of the transmission. Refer to your parts manual or operation manual for exact location.
4 - Clean the screen with a carburator cleaner or fresh diesel.
5 - Re-install screen and cover. Re-fill with the correct amount of Hydraulic Transmission oil. Never use a simple Hydraulic oil. Check periodically with the dipstick or check your Yanmar operation manual for your tractor.
6 - Start tractor and check for leaks.
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