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G/MAN
01-19-2006 07:34:58
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Re: Need Torque Values on 49' G. in reply to Miller49G, 01-19-2006 00:51:12
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I don't believe Deere made an actual "service manual" for the "G", so I&T specs may be all you can get. In situations where you can't find a specific spec, you'll likely have to resort to using standard specs for the size of fastener you're dealing with and the thread pitch. For instance, I think those bolts or studs holding the rear-axle housing to the main case are 5/8", so you're going to be looking at around 150 lb.-ft. And you may not be able to get a socket on all of them, so if you use a crow's foot or adapter, you'll have to adjust your torque reading accordingly. Myself, I'd just use some blue Loctite and get them good and tight. You also want to be careful swapping shims around on main-bearing housings, as you can end up getting the bearing out of round if you go looking for a specified clearance. Usually, you install the new bearing halves and shim for a certain diameter, and then have the bearing bored out to the proper clearance for the main journal. JD used to sell rebuilt main-bearing housings that way, as a matter of fact. Using plastigauge is pretty impractical, as you'll have to have the main bearing and crankshaft immobile while you assemble it all with both removed from the main case. You're better off using a telescoping gauge and micrometer to get an inside diameter reading from the main bearing, and an outside diameter from the crank journal, and derive your clearance from that. But based on the engine speed and how much it will probably be used, if the bearings and journals look good, I wouldn't worry much about an extra thousandth of clearance or two.
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