USED PRIOR TO TRACTOR SERIAL NO. < 200001...
Parts book intricates that SERIAL NO. 20000 > used the same parts
#35.....825 554 M1 (Crown Wheel)
#36.....16 773 X (Crown Wheel Ball) #37....825 042 M1 (Crown Wheel Ball retainer)
#38....825 555 M1 (Crown Wheel (spring) Washer)
#39....825 556 M1 (Lock, Crown Wheel Ring)