1550 RC transmission

Mike(NEOhio) · Feb 24, 2019

Just curious, maybe someone can explain it to me. My 1550 row crop has the -502 high speed transmission and I'm not looking to change it. The high speed shifter has the low range in the forward position but the regular has it rearward. Looking at the parts diagram there is no difference in the gear callouts except for one pair that is listed as "low speed tractor". Nothing pertaining to the high speed option. I'm wondering if the difference is nothing more than flipping the range gears around. The high speeds are only on 5th and 6th. 1 thru 4 are actually a little slower, which I like. Can anyone enlighten me?

Hartman · Feb 24, 2019

My grandpa had one..loved it. Seemed like all gears but 1st,2nd and 1st reverse were faster than all our other 1650s,1750s,ect. 4th gear was used everywhere from planting,raking,baleing,ect.

Traditional Farmer · Feb 24, 2019

My 1600 utility is fast in all the gears,it'll run as fast in 5th as my 1550 row crops will run in 6th.On the other hand my 1650 Wheatland is geared slow.

J. Schwiebert · Feb 25, 2019

Yes, but remind me in about a week if I forget.

Mike(NEOhio) · Feb 25, 2019

Will do.

rrlund · Feb 25, 2019

Can't tell you,but I think the utility had that pattern too doesn't it? When I got a set of decals form Lyle for mine,the shift pattern decal was backwards like that.

Mike(NEOhio) · Feb 25, 2019

From the op manual. Mine is on the left. What got me thinking is there was a post a while back asking if a high speed could be converted. The parts book gives the number of teeth on the gears and I didn't see any different gearing listed.

B A Star · Feb 25, 2019

Mike and others:
? Perhaps the operators manual is somewhat misleading. ? The 502 is the high speed 5th and 6th gears in a Row Crop, however is regular speed in a Utility because of the smaller rear tires. ? There are two gears that you need both on the differential drive shaft. ? I assume that you have access to a parts book or shop manual, in parts, gear #54 160 278 AS and gear #55 160 277 A. The illustration in the shop manual shows the High Speed.? Gear on the input shaft needs to be turned around, gears #31 & 37 on the countershaft need to trade places.
? Should you decide to do this hope you have a good shop. ? The engine & hydra-power need s to come out, Hydraulic removed, PTO removed, Axle carriers & wheels removed, Brakes and differential supports removed, Ring gear removed and transmission completely disassembly (leave reverse idler alone). ? Gears #54 & 55 are on the differential drive shaft and that is the start of assembly of the transmission. Been there done that.

Mike(NEOhio) · Feb 26, 2019

Thanks, B A. That's kinda what I was thinking. And I'm not looking to change it but it has been asked here in the past.

1550 RC transmission

Mike(NEOhio)

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Hartman

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Traditional Farmer

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J. Schwiebert

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Mike(NEOhio)

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rrlund

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Mike(NEOhio)

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B A Star

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Mike(NEOhio)

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