JD 630 Crank Timing Question

[kylew01]

Question for the wizards out there... I have a John Deere 630, and I just had the crankshaft and bearings worked on. I went to put it back in, but I can no longer see the timing mark on the gear on the crankshaft. Is there any way to figure this out without being able to see the mark? They must have buffed it off when they polished it.

Thanks!

 

[John Deere D]

Here's a procedure for the JD 60. I&T SHOP MANUAL NO. JD-16 "1960"
Timing marks are on the inboard side of the Crank Gear.

 

[kylew01]

Thanks so much for your response.

I pulled the crank out, and the timing mark is on the inside of the gear. However, my shop manual for the 630 shows it on the outside. Do you think the machine shop flipped it around, or should I just mark the outside of the tooth with a marker, and put it together that way?

Thanks again!

 

[John Deere D]

Is the timing mark on the CAMSHAFT GEAR on the inboard face of the gear (see FIG JD1791) or the outboard face of the Cam Gear?

 

[kylew01]

It's on the inside, as your image shows. I guess my confusion is because that image shows a model 60, where my 630 book shows it on the outside. It's currently on the side facing the center of the crankshaft, not the outside.

Thanks!!

 

[John Deere D]

One of your options is to contact the Machine shop and verify the position of the Crank Gear. Was there any work performed on the crank that would require removal of the crank gear?

 

[kylew01]

They did polish it, so I will call them and ask if they removed it to do so.

 

[kylew01]

(quoted from post at 07:44:53 06/04/15) One of your options is to contact the Machine shop and verify the position of the Crank Gear. Was there any work performed on the crank that would require removal of the crank gear?

Someone on Facebook mentioned that there may be a timing mark on the inside of the gear it meshes with. I looked in, had to turn it, and sure enough, it has a gear on both sides. I'm hoping Deere marked the inside for just such an occasion. Thanks again!

 

[kylew01]

Okay, last question, I promise. I actually have the tractor all back up and running now. It seems to be doing pretty good. I have a question though--the manual mentions the crank rod bearings with a clearance, and a torque spec for the nuts on the bolts on the rods. I'm assuming the clearance is just for the bearings, right? I sent the crank off to the shop, and they sent it back with bearings, so I'm assuming that all I need to do is slap them in and tighten it down good. Am I correct, or do I need to check anything else? I REALLY don't want to tear it down again.

Thanks!!