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wc wd wd45 wd45d d17 d17d gear ratios
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HudCo View Drop Down
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Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 3475 		Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Topic: wc wd wd45 wd45d d17 d17d gear ratios
    Posted: 04 Aug 2024 at 7:17pm
what are the gear ratios for those tractors  is the final ratio on the wc differant.  maybe we can make little chart to print
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You can calc it from the tractordata.com data, assuming theyre based upon the rated RPM values.  That's what I used for my tachometer device.  Probably easier to understand the tractordata.com data that shows the gear speed, the following is a conversion factor to convert RPM for the various models.  If anybody spots an error, please let me know.  I'm within a day or so shipping the finished device and it will be hard to fix the software after I ship it.  (I realize it doesn't include your complete list.  I also realize these values exceed the default precision, so round as appropriate).

float bG1CF = 0.00133333333333333333333333333333;  // Ground speed in gear 1 conversion factor (late model B with CE engine, 1500)
float bG2CF = 0.00266666666666666666666666666667;  // Ground speed in gear 2 conversion factor
float bG3CF = 0.0052;  // Ground speed in gear 3 conversion factor
float bG4CF = 0.0;  // Ground speed in gear 4 conversion factor
float bGRCF = 0.00133333333333333333333333333333;  // Ground speed in gear R conversion factor
float bPCF  = 0.37333333333333333333333333333333;  // PTO RPM conversion factor
float bBCF  = 0.702;  // Belt RPM conversion factor

float cG1CF = 0.0015;  // Ground speed in gear 1 conversion factor
float cG2CF = 0.00266666666666666666666666666667;  // Ground speed in gear 2 conversion factor (1500)
float cG3CF = 0.005;  // Ground speed in gear 3 conversion factor
float cG4CF = 0.0;  // Ground speed in gear 4 conversion factor
float cGRCF = 0.002;  // Ground speed in gear R conversion factor
float cPCF  = 0.37333333333333333333333333333333;  // PTO RPM conversion factor
float cBCF  = 0.75266666666666666666666666666667;  // Belt RPM conversion factor

float caG1CF = 0.00121212121212121212121212121212;  // Ground speed in gear 1 conversion factor (1650)
float caG2CF = 0.00212121212121212121212121212121;  // Ground speed in gear 2 conversion factor
float caG3CF = 0.00272727272727272727272727272727;  // Ground speed in gear 3 conversion factor
float caG4CF = 0.00684848484848484848484848484848;  // Ground speed in gear 4 conversion factor
float caGRCF = 0.00212121212121212121212121212121;  // Ground speed in gear R conversion factor
float caPCF  = 0.32606060606060606060606060606061;  // PTO RPM conversion factor
float caBCF  = 0.73939393939393939393939393939394;  // Belt RPM conversion factor

float wcG1CF = 0.00192307692307692307692307692308;  // Ground speed in gear 1 conversion factor (1300)
float wcG2CF = 0.00269230769230769230769230769231;  // Ground speed in gear 2 conversion factor
float wcG3CF = 0.00369230769230769230769230769231;  // Ground speed in gear 3 conversion factor
float wcG4CF = 0.00692307692307692307692307692308;  // Ground speed in gear 4 conversion factor
float wcGRCF = 0.00153846153846153846153846153846;  // Ground speed in gear R conversion factor
float wcPCF  = 0.41153846153846153846153846153846;  // PTO RPM conversion factor
float wcBCF  = 0.9;  // Belt RPM conversion factor

float wdG1CF = 0.00178571428571428571428571428571;  // Ground speed in gear 1 conversion factor (1400)
float wdG2CF = 0.00271428571428571428571428571429;  // Ground speed in gear 2 conversion factor
float wdG3CF = 0.00357142857142857142857142857143;  // Ground speed in gear 3 conversion factor
float wdG4CF = 0.007;  // Ground speed in gear 4 conversion factor
float wdGRCF = 0.00164285714285714285714285714286;  // Ground speed in gear R conversion factor
float wdPCF  = 0.38571428571428571428571428571429;  // PTO RPM conversion factor
float wdBCF  = 0.9;  // Belt RPM conversion factor

float wd45G1CF = 0.00171428571428571428571428571429;  // Ground speed in gear 1 conversion factor (1400)
float wd45G2CF = 0.00271428571428571428571428571429;  // Ground speed in gear 2 conversion factor
float wd45G3CF = 0.00357142857142857142857142857143;  // Ground speed in gear 3 conversion factor17
float wd45G4CF = 0.00807142857142857142857142857143;  // Ground speed in gear 4 conversion factor
float wd45GRCF = 0.00235714285714285714285714285714;  // Ground speed in gear R conversion factor
float wd45PCF  = 0.39142857142857142857142857142857;  // PTO RPM conversion factor
float wd45BCF  = 0.9;  // Belt RPM conversion factor

float wfG1CF = 0.00192307692307692307692307692308;  // Ground speed in gear 1 conversion factor (Assumed rating of 1300RPM)
float wfG2CF = 0.00292307692307692307692307692308;  // Ground speed in gear 2 conversion factor
float wfG3CF = 0.00384615384615384615384615384615;  // Ground speed in gear 3 conversion factor
float wfG4CF = 0.00753846153846153846153846153846;  // Ground speed in gear 4 conversion factor
float wfGRCF = 0.00176923076923076923076923076923;  // Ground speed in gear R conversion factor
float wfPCF  = 0.41538461538461538461538461538462;  // PTO RPM conversion factor
float wfBCF  = 0.9;  // Belt RPM conversion factor

float ucG1CF = 0.00191666666666666666666666666667;  // Ground speed in gear 1 conversion factor (1200)
float ucG2CF = 0.00275;  // Ground speed in gear 2 conversion factor
float ucG3CF = 0.00416666666666666666666666666667;  // Ground speed in gear 3 conversion factor
float ucG4CF = 0.00833333333333333333333333333333;  // Ground speed in gear 4 conversion factor
float ucGRCF = 0.00216666666666666666666666666667;  // Ground speed in gear R conversion factor
float ucPCF  = 0.0;  // PTO RPM conversion factor
float ucBCF  = 0.9125;  // Belt RPM conversion factor

char *bRRPM = "1500";
char *cRRPM = "1500";
char *caRRPM = "1650";
char *wcRRPM = "1300";
char *wdRRPM = "1400";
char *wd45RRPM = "1400";
char *wfRRPM = "1300";
char *ucRRPM = "1200";



Edited by dfwallis - 04 Aug 2024 at 8:19pm
1952 CA13092
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Points: 20119 		Post Options Post Options   Thanks (1) Thanks(1)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 04 Aug 2024 at 8:38pm
WC final drive is 4 to 1. WC ring and pinion is 4.7 to 1.   **   WD/WD45 final is 5.47 to 1. WD ring and pinion is 3.5 to 1. Late WD/WD45 gas is 3.3 to 1. WD45 diesel is 3.89 to 1.  **   D-17 final drives are 5.47 to 1 (S1 and S2) and 5.43 to 1 (S3 and S4).  All D-17 ring and pinions are 3.89 to 1 same as WD45 diesel.    **   WC/WD/WD45/D17 transmission input 1.85 to 1.     **   WC/WD 1st gear 2.00 to 1. Late WD/WD45/D17 1st gear 2.50 to 1.  **   WC/WD 2nd gear 1.38 to 1. Late WD/WD45/D17 2nd gear 1.59 to 1.   **   WC/WD 3rd gear 1.04 to 1.  Late WD/WD45/D17 3rd gear 1.19 to 1.    **  4th gear direct drive on ALL tractors listed.    ***Late WD and all WD45's are the exact same transmissions. WD45 diesel has 15% slower ring and pinion same as all D17's.
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Joined: 29 Jan 2013
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Points: 3475 		Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 04 Aug 2024 at 10:35pm
what make s the  series 1 and series4 a little differant at the final drive
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Joined: 29 Jan 2013
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dfwallis what is your tachometer device ?
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Joined: 14 Sep 2009
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Points: 870 		Post Options Post Options   Thanks (1) Thanks(1)   Quote Kip-Utah Quote  Post ReplyReply Direct Link To This Post Posted: 04 Aug 2024 at 10:42pm
Like Dr. Allis says, virtually every WC that you’ll likely encounter will be geared 4.7:1, however we have two high crop WCs that are geared 6.6:1 to compensate for the taller 36” tires. BTW all RCs are also geared 6.6:1 even though they only have 28” tires & use the same transmission as a WC. The WC based Speed Patrol graders have even lower speed gearing at something like 7.2:1.
HANSEN'S OLD ORANGE IRON. Showing, Pulling, & Going!!
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Older finals are 15 teeth driving 82 teeth for 5.47 to 1.  Newer finals have fatter/stronger teeth with 14 teeth driving 76 teeth for 5.43 to 1. Less than 1 % difference in speed but stronger and more reliable.
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For example, a D-17 in low gear (high side) is 98.40 to 1 ratio at the rear wheel.     1.85 x 2.50 x 3.89 x 5.47 = 98.40 total.

Edited by DrAllis - 05 Aug 2024 at 9:21am
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Originally posted by HudCo HudCo wrote:

dfwallis what is your tachometer device ?

I've built an Arduino Nano ESP32 based tachometer with a 4 inch TFT display that will read the engine RPM and display the engine RPM, PTO RPM, Belt RPM, and the estimated ground speed in MPH for each gear, and battery voltage.  I thought about adding hydraulic pressure but the sensor cost more than the whole tach device so far.  I included code for gas versions B, C, CA, WC, WD, WF, WD45, and UC.  But the default is CA and I've not included the dip switch needed to select the other versions due to PCB space limitations (there's space for an additional PCB but then I'd have to run a ribbon cable between the two).  I've also not 100% verified that the data based upon tractordata.com data for all versions is correct.  The values for CA seem accurate which is my immediate focus.  I should have pics of the "finished" to-be-shipped product in a day or so.  I accidentally damaged an LED by not calculating the correct current limiting resistor and have to fix that today.
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Tractor Data actual ground speeds would be suspect. Where did they get their information?? and what size tire was on the unit versus what size tire is on yours ??
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Originally posted by DrAllis DrAllis wrote:

Tractor Data actual ground speeds would be suspect. Where did they get their information?? and what size tire was on the unit versus what size tire is on yours ??

Perhaps, but it's the best info I have.  In any case, if I find a better source, it's an easy code change (just pop out one processor, insert new revised one).  More critical now is sensor installation and avoiding spurious pulses.
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Nebraska Test says model CA tractor at 1650 engine speed goes 2 MPH in low gear. 3.5 MPH in second gear.  4.5 MPH in 3rd gear.   11.25 MPH in 4th gear. This is with 10 x 24 (11.2 x 24) rear tires. Wider tire means more diameter and faster speeds.

Edited by DrAllis - 05 Aug 2024 at 3:54pm
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Originally posted by DrAllis DrAllis wrote:

Nebraska Test says model CA tractor at 1650 engine speed goes 2 MPH in low gear. 3.5 MPH in second gear.  4.5 MPH in 3rd gear.   11.25 MPH in 4th gear. This is with 10 x 24 (11.2 x 24) rear tires. Wider tire means more diameter and faster speeds.

That's what I used.  I'm ok with assuming OEM tire sizes.  I have 13.6x24 tires though.
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That will change things for sure.  1st gear becomes 2.2 MPH.   2nd gear is now 3.9 MPH.  3rd gear is 5.0 MPH.   Road gear is 12.5 MPH.
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Originally posted by DrAllis DrAllis wrote:

That will change things for sure.  1st gear becomes 2.2 MPH.   2nd gear is now 3.9 MPH.  3rd gear is 5.0 MPH.   Road gear is 12.5 MPH.

I'll add that to the code notes.  Maybe some future version can add the touch screen interface and a submenu to make some adjustments, but that's beyond my immediate concern at the moment.  

I did finally get word today that the guy started working on my hand clutch after several months.  He (former AGCO dealer) said he had a devil of a time getting it out.  I don't feel so bad now :(
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holy cow never thought i would plug the laptop to my c    but it i would be a cool tractor pulling toy
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got this post printed to put put in my allis folder
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Originally posted by dfwallis dfwallis wrote:

Originally posted by DrAllis DrAllis wrote:

That will change things for sure.  1st gear becomes 2.2 MPH.   2nd gear is now 3.9 MPH.  3rd gear is 5.0 MPH.   Road gear is 12.5 MPH.

I'll add that to the code notes.  Maybe some future version can add the touch screen interface and a submenu to make some adjustments, but that's beyond my immediate concern at the moment.  

I did finally get word today that the guy started working on my hand clutch after several months.  He (former AGCO dealer) said he had a devil of a time getting it out.  I don't feel so bad now :(

Actually, since I have to change the code for the battery voltage sensor, I'll go ahead and make the change.
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Originally posted by HudCo HudCo wrote:

holy cow never thought i would plug the laptop to my c    but it i would be a cool tractor pulling toy

Technically, you could connect a laptop to it (that's how its programmed in the first place), but the USB port, WIFI, and Bluetooth are all inside the case so you'd have to open it up to connect.  Then I'd have to write some software for it to do something :(  The Arduino Nano doesn't have an external antenna port and I've not investigated if I could tap in somewhere and make one, but that would pretty much be necessary (i.e. an antenna on the back) to use wifi/bluetooth).  Or I could change the processor.  Other's do have external antenna ports.  The nano is intentionally minimalist.

I could do a whole lot more with it, but probably won't.  If I did, I'd probably have to make a custom PCB.  The prototypes are just too space limited.


Edited by dfwallis - 06 Aug 2024 at 2:01pm
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