QL series
530000 thru 665000
a. steering tube change @530858
b. fuel tank change @560212
c. yellow paint change @562954
d. springs to screws on grill @565131
e. manual to auto relief valves 1450,1650 @590522
f. manual to auto relief valves 1250 @597245
g. muffler change @606613
h. grill screen change @613253
i. drive shaftchange @622957
j. front spindle size change @632502
k. wet brakes are introduced on GD @568544
l. wet brakes on hydros @604164
m. maintenance minder meter was changed @588841
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1977 1650 with cast iron lower grill housing, cast iron oil pan, 54" push-snow blade, rear blade, disc-harrow, 44c and 48" decks, Two cultivators, #1 tiller with both extensions, loaded tires, 75' weights and chains, #2 cart.
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