Started working on the H3 conversion today. Be aware my tractor is a 1983 and therefore considered an early 318. Tractor has a 4 port steering valve with plumbing associated to this valve. The H3 conversion will therefore follow early 420 setups. I have elevated the front of the tractor to be able to get under tractor to work on the valve. Following is the 318 H2 valve. In the tractor it is oriented upside down compared to shown graphic. The in port which is the first hose removed in actually in the lowest corner. Valve graphic is attached pdf file.
- First step is to disconnect tubing and hoses to remove the H2 valve.
- Easier to work on disconnecting adapters if you can get the lines and oil filter out of the way.
- So first step should be to drain transmission oil.
- Remove the transmission filter
- Disconnect coupler adapters from lines on front of tractor.
- Disconnect clamps that hold the lines in position under the engine.
- Disconnect hose at IN port.
- Next disconnect the two right front steel lines at the lower work ports A & B. These are the 37° flare fittings connected to straight adapters in work ports.
- As each tube is disconnected it needs to be swung down out of the way and allowed to drain in a pan.
- Murphys Law applies here. Every tool/flash light/whatever that is dropped will fall into that pan of oil.
- Next disconnect the two left front steel lines from the tee's in work parts C & D.
- Ten disconnect the other two fittings at the tee's. These two connection go to the work ports on the rockshaft cylinder.
- The last line to disconnect is the fitteing at the OUT post.
- You should now be able to remove the cylinder. Lower mounting bolt is a breeze. Upper is worst part of the Removal process it helps to have a long 10 mm wrench to reach up to the head of the bolt on the back side of the mounting plate. I have long SAE but not metric wrenches. Need to find alternate wrench.
- Question: Can I drill a hole in the frame large enough for a 10 mm socket? Sure would make the job easier.
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