Sounds good to see a tractor running again!
Below is a list that might be helpful for who restore 55's. I have to find out equivalents because few parts are available.
Qty -Description -MH ref -Other source
1 - Crankshaft front seal- MH17627A -Timken 450101
1 -Steering box seal -MH14066e -Timken 480356
1 -PTO front seal -MH15993A -Timken 450303
1 -Belt pulley seal -MH18487A -Timken 473471
1 -PTO box rear seal -18489A -Timken 470950
2 -Brakes seal -15874X -Timken 415003
1 -Secondary fuel filter -WIX33191
1 -Engine oil filter -WIX57290
1 -Fan belt -Gates C46 (or other brand C46)
4 -Radiators pads -Same as John Deere 330-430 (ebay)
2 -Steering box bushings and felt seal -Same as Ford 8N
2 -Engine sleeve bottom seal (x2) -McMasterCarr 5267T139
1 -Engine sleeve upper seal (X10) -McMasterCarr 955K194
1 -Flywheel bearing -6205
2 -Front axle knee trust bearing -McMasterCarr 60715K29
1 -Rear main seal -Same as MH44
1 -Water pump -Same as 44,33
1 -Starter -I Used Delco Remy from MF1155 or MF860 combine. Also Nippodenso with rotatable head from Allis Chalmers works. The big delco-remy needs to have the head adjusted to be outside of the air intake pipe, which make it very visible. The smaller Nippodenso could have the head between block and air intake.
1 -Heater spark plug - Champion 7989 found at O'Reilly (only one with the good threads and good length, but doesn't have external electrode as original. If someone find better source...)
1- Head gasket set -FelProHS7774S (lookup federal mogul website and look then for Continental engines).
And also on mine,
- All fuels pipes and oil tubes converted from rubber to rigid tubing with flare tubing
- Frame was broken at 3 places and was replaced by a January 1947 44 long frame (special because frame casting has 2 small pockets where engine flywheel housing mounts instead of one long pocket).
-Also front bushings changed and finded at MacMasterCarr
-Wires redone with MacMastercarr material (wire stock, connections, etc...)
-The heater vibrator was remade using this diagram, but I believe that using Ford T ignition might work as well
http://www.tract-old-engines.com/vibreur_lanz.html. I used a used coil and condenser from a car salvage and put the relay under the instrument panel, not original, but it buzz. I was thinking to put a thermostart like on European MF175 or JD2030 for example, but we will see how sell the buzzer heater works.
-And I had to buy few parts from Jerry and from Montes of Chicago (Thermostat, and main bearing).