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| John Deere Tractors Discussion Forum |
Topic: Re: JD 620 Tach drive
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| Scott 730
03-03-2013 17:21:36
75.168.204.209
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620 and 630 tractor speed hour meter drive gear set AF 2709 R subs to
F 2547 R $22.06
F 2548 R $15.02
This post was edited by Scott 730 at 17:23:27 03/03/13.
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| RMOMN
03-03-2013 17:28:12
70.97.243.96
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Re: JD 620 Tach drive in reply to Scott 730, 03-03-2013 17:21:36
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| Scott have you done this repair I'm wondering what it takes to replace the gears? Is the repair straight forward to do?
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| Scott 730
03-03-2013 18:39:50
75.168.204.209
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Re: JD 620 Tach drive in reply to RMOMN, 03-03-2013 17:28:12
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| RMOMN said: (quoted from post at 20:28:12 03/03/13) Scott have you done this repair I'm wondering what it takes to replace the gears? Is the repair straight forward to do? |
Replaced gears in my 730 diesel. I would guess the gassers would be a similar job. I had to pull the governor shaft out of the housing to replace the drive gear on the shaft. It would be wise to replace both gears. Not a good idea to mesh 1 new gear with 1 old one.
This post was edited by Scott 730 at 18:44:37 03/03/13.
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| Canadian Ken
03-03-2013 18:27:34
98.102.242.50
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Re: JD 620 Tach drive in reply to RMOMN, 03-03-2013 17:28:12
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| | I replaced the gear on my 720 gas -remove the cap from the distributor
-drill a small 1/8 hole in the 2 or 2-1/4 inch welsh plug
-screw a metal screw in hole and pry out welsh plug with j bar
-remove cover from left side of governor housing
-pull governor drive gear to the left
-remove old plastic tach drive gear
-grease shaft of gear assembly and install new gear
-push governor shaft in slowly to mesh plastic driven gear with teeth on governor shaft
-make sure gasket on governor is still good -or -replace with same thickness gasket/shim
-reinstall cover
-braze hole shut that was drilled in welsh plug if it is re-usable -hammer center of plug out into a concave shape
-re-install welsh plug and tighten with hammer striking center of plug
-install tach cable
-replace distributor cap Ken
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| RMOMN
03-03-2013 18:58:53
70.97.243.96
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Re: JD 620 Tach drive in reply to Canadian Ken, 03-03-2013 18:27:34
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| Thanks Ken and Scott that is exactly what I was looking for. Sounds like a pretty straight forward job.
Bob
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