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Hello Forum, anybody know if/where I can get a used injector pump for a JD650? Is this an item that's rebuildable? What started out as a governor rebuild problem actually turns out to be an injector pump problem. Can I get a pump from a Yanmar dealer since it's a Yanmar pump? Thanks for your help, I'm having alot of trouble justifying the $785.00 pricetag for a pump from JD.<br>
<br>
-Bryan

Need a JD injector pump
Parts and Repair
Replies 2 Post by bhocken

Thanks for the advice everyone...looks like I'm getting a manual first! Is the JD Technical Manual the best resource, or is there a better publication? I'm assuming for the price JD charges, the manual comes w/ a JD mechanic for the first hour? :)

JD 650 Governor Rebuild
Parts and Repair
Replies 7 Post by bhocken

Hey everyone, thanks for the feedback. As it turns out, it was the lower drive pulley (or sheave as JD calls it) on the PTO which was the culprit. The pulley is a double-belt pulley with a splined hub to slide onto and drive the splined shaft of the front PTO. The splines on the pulley where worn down and caused the pulley to slip when under load. I replaced the pulley and problem solved. The pulley cost $110, which seems steep for a pulley, but I guess it could have been worse.

I'm not sure what caused the splines to wear down? My dealer said he's seen this one other time. The shaft is fine, as that's hardened steel. I guess after 25 years of use, something's bound to wear down...

JD mid pto problem
John Deere Tractors
Replies 7 Post by bhocken

Hello, does anyone know what the speed is on a mid-PTO for an older (1987) JD650 is? My local guy told me 2000 RPM, but that was somewhat of a guess?

Thanks,
Bryan

Mid PTO speed
John Deere Tractors
Replies 2 Post by bhocken

I just finished building a FEL for my JD 650. I ordered all my hydraulics from Baileynet: http://www.baileynet.com and was very happy w/ their service and help.
Probably the biggest thing to consider on the cylinder size is how long your loader arms will be in relation to the mounting points of the cylinder. If the cylinder's too long, you'll either raise the bucket over the seat of the tractor and operator, or just bend the frame of the loader. Too short and it won't raise high enough. Since I didn't have access to a CAD program, I made models of the loader arms out of 2x4s to see exactly how long they needed to be with the cylinder both extended and retracted all the way. Also consider front tire clearance as the axle pivots on uneven ground.
You may want to check out the Yahoo Homebuilt Equipment club: http://clubs.yahoo.com/clubs/homebuiltequipmentfortractors Check the photos section, a guy named Matt Brule built a CadLoader for a Yanmar 1500.

Good Luck,
Bryan

cylinder size
Loaders Back Hoes
Replies 5 Post by bhocken