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Discussion Boards > Active Subjects > Messages as Posted > Tractor Engine Repair Rebuild Forum

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 03-24-2001, 14:10 Post: 25811
John B



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 JD870 Questions

Recently purchased a JD 870 tractor with relatively low hours. Before the spring/summer I figured I would go over some of the maintenance checks to get to know the tractor better. I'm no mechanic - just what I picked up in the military. I have a few questions:1. On the grease chart an arrow is pointing to the front wheels with the note "spindle". There doesn't appear to be a grease fitting in that area. Am I missing something obvious?2. I wanted to replace the fuel filters - to untwist the barrel does the plastic barrel untwist or the metal top unscrew?3. The rockshaft for the 5' bushhog seems to be slightly warped. Is the vibration something I can live with or will it mess up the PTO or transmission in any way?Thanks for your help with these probably obvious answers. Incidently, I really am starting to like this little tractor. Resp.John B.






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 03-24-2001, 15:20 Post: 25812
Bird Senter

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 JD870 Questions

John B, I'm not familiar with your tractor, but if it's anything like my Kubota, the metal ring at the top is what you unscrew, not the plastic barrel, and I suppose you are talking about the driveshaft from the tractor PTO to the brush hog gearbox, instead of a rockshaft, being warped. I suppose if it's slight enough you could get by with it, but I wouldn't. If it can't be straightened enough to avoid any vibration, I'd replace it. Have you checked the spindle on the front end for a hole where a grease zerk should be?






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 03-25-2001, 22:02 Post: 25877
Greg franklin



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I thought I would be of more help but I cannot find my service manual at this moment. I did locate my operators manual though. Bird was correct on unscrewing the collar and not the bowl. My guess is that on the spindles (2WD) you will find something along the lines of wheel bearings and these you just repack with grease, i.e. no grease fitting (this is where I thought I could nail it down for you, sorry). The 870 is considered by many to be a solid, problem free tractor. This has been my case.






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 03-26-2001, 05:52 Post: 25892
TomG

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 JD870 Questions

If it has 4wd, the front axle oil likely lubricates the bearings and spindles. Many 2wd arrangements have two spindle bushings, and I be surprised if they didn't require greasing. If it's 2wd, I'd look for fittings between the tie rod attachments and the wheels. Some automotive kingpins fed grease through the king pins to the bushings. A fitting could even be on the top end of the spindles. I believe the 870 is a diesel tractor. Diesels are very particular about air in the fuel lines. The fuel and possible injector lines have to be bled when a fuel filter is changed or the engine won't start. I'd make sure I knew the bleeding procedure before removing the fuel filter.






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 03-26-2001, 20:39 Post: 25937
John B



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Thanks for the responses. This 870 is a 4WD, so I'm thinking that the diagram in the owners manual (under 50 hour service) is probably generic to 4WD and 2WD and the grease fitting doesn't exist as TomG indicated. Any other insight would be helpful.

Thanks again.

JohnB






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 03-26-2001, 21:41 Post: 25939
Greg franklin



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Tom makes an excellent point about bleeding the lines. I was pleasantly surprised to find out about my 870 that it is self bleeding. Just add fuel and crank. Of course I didn't know that until after I ran it out of fuel and thought darn, this is going to be fun.

The four wheel drive greasing schedule shows your typical tie rod ends, the ends of the power steering cylinder and the axle pivot pin. The spindles are running in an oil bath.






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Discussion Boards > Active Subjects > Messages as Posted > Tractor Engine Repair Rebuild Forum

Thread 25811 Filter by Poster:
Bird Senter 1 | Greg franklin 2 | John B 2 | TomG 1 |




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