john deere 300b

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    1980 John Deere 300B injector pump

    A couple of years ago I bought a 300B backhoe. It had been sitting in the guys pasture for 2-3 years. We dragged it back to the shop and tried to start it. No luck. So I did a compression check. 100-0-300 psi. No good. So I ordered a in-frame rebuild kit, installed it and did a valve job...
  2. T

    1979 John Deere 300B diesel backhoe question

    Could anyone on the forum help me out with a wiring diagram for my 79 300B back hoe? Its a diesel (not gas)
  3. A

    John Deere 300B Injection Pump Question.

    The tractor recently refuses to run. It started off staying running for only about a minute and cant throttle or anything. Then it would stall out. Now it will not run at all. Changed fuel filter and fuel pump. Cleaned out the injectors. Next thing I can think of would be the Injection Pump...
  4. M

    JD300B Rockshaft leak

    Hello to all, I have a 1983 JD300B with 3pt hitch that will lift implements but will often need to be jerked or manually helped to do so. I looked through the Hydraulic fill cap hole and can see spraying oil from the top, if I jerk the lift harms manually,the implement lifts very well and the...
  5. A

    JD300B hose from Hydraulic filter to Transmission Help?

    Where could I find this hose, or what could i use? I can not seem to find low pressure hydraulic lines and I do not want to leave my system drained for days. Thanks!
  6. 7

    John Deere 300B Hydraulics Again

    Hi, I am new here, at least as a member. Have been following this site for years and it has been very educational and there is a lot of knowledge base. My issue again is with the hydraulics of a 300B with loader and backhoe. I have read the previous posts, followed the advice and learned a lot...
  7. S

    John Deere 300B

    Searching for information for a friend. Looking for a manual for a 300B specifically how to replace the transmission filters. He took them off and doesn't know the order to replace the screws and other parts. If anyone can direct us to a resource it would be greatly appreciated.
  8. G

    John Deere 300B hyd problem. Pressure Control Valve Orifice???

    Im having intermediate loss of hyd pressure for the loader and hoe. Cleaned suction screen, changed fluid. I understand the Pressure Control Valve (AR65882) can cause my problem and have removed it and cleaned it. Inside there is a cup shaped part that the parts manual calls an orifice, however...
  9. D

    hydraulic problems 70's vintage John Deere 300b loader

    Hello all !!! Last month I bought a 70's vintage John Deere 300b tractor with a loader and a cab. After 1/2 hour of using it, the hydraulics start to shutter. If I let it rest for 10 min it will start to work again. I have changed the hydraulic oil and both filters. I also (watched a...
  10. 6

    John Deere 300b loader slow

    I have a 300b john deere that has always seemed to have a slow loader, boom up and tilt atleast. I have noticed that the first time I start it after its been sitting for a couple days if I raise the loader as soon as it starts it raises very fast. after the first time it hits its stand-by...
  11. M

    John Deere 300B Gas - Hydraulic Fluid

    I just got a 70's model john deere 300b backhoe. what type of hydraulic fluid should I run it it. I can find any info out through the dealer. thanks
  12. O

    JD300B

    Hello everyone. I am new member who could use some advice. I have a 1972 JD 300b backhoe diesel that has a starting issue. When it sits for a day or so it starts right up after running it if I shut it down it barely turns over and will not turn fast enough to start. Battery voltage checks...
  13. J

    John deere 300b burns oil

    I have a 1980 john deere 300b that buns oil. It is a 3 cylinder diesel..... Why is this so
  14. J

    John deere 300b burns oil

    I have a 1980 john deere 300b that burns oil....why is this so?
  15. J

    John deere 300b issue

    Hi I have a 1980 john deere 300b backhoe/loader. The hydraulics only work at full rpm and are somewhat slow.....I was told the pump sounded good. I am lost and need some help figuring out why the hydraulics are acting up. This is not just the loader, it is the backhoe and power steering. Once...
  16. J

    John deere 300b hydraulic issues

    Hi I have a 1980 john deere 300b backhoe/loader. The hydraulics only work at full rpm and are somewhat slow.....I was told the pump sounded good. I am lost and need some help figuring out why the hydraulics are acting up. This is not just the loader, it is the backhoe and power steering. Once...
  17. J

    John deere 300b hydraulic problems

    Hi I have a 1980 john deere 300b backhoe/loader. The hydraulics only work at full rpm and are somewhat slow.....I was told the pump sounded good. I am lost and need some help figuring out why the hydraulics are acting up. This is not just the loader, it is the backhoe and power steering. Once...
  18. B

    Can't find loader pins for 1974 John deere 300b

    Has anyone found a good source for loader pins for a 1974 John Deere 300D Industrial tractor? I have a part number out of the manual but nothing comes up when Goggled. Mine are shot. Thanks.# AU42550 Loader bucket pins.
  19. J

    Backhoe  John deere 300B Loader/Backhoe project. Where is the back place to get used parts?

    My father-in-law just bought a old John Deere 300B backhoe/loader, he figures its a 70's vintage. Interestingly enough it might even be one he helped build when he was at John Deere Dubuque Works many years ago. This one is a project, but he was able to get it started and drive it the 10 miles...
  20. J

    Backhoe  John deere 300B Loader/BachWhere is the back place to get used parts?

    Deleted this one 'cause my clumsy thumbs inadvertently published the thread before finishing editing. Moderator, I couldn't figure how to delete this thread, would appreciate if you would do so.
  21. R

    john deere 300b back hoe has no functions wont even travel

    john deere 300b back hoe has no functions wont even travel -------------------------------------------------------------------------------- any help will be great just got this hoe the previous owner said hydr functions and the tranmission fwd and rev quit at one time had a vibration and...
  22. R

    john deere 300b back hoe has no functions wont even travel

    any help will be great just got this hoe the previous owner said hydr functions and the tranmission fwd and rev quit at one time had a vibration and lost all function still starts and runs great with no noises but will do nothing previous owner said that he knew it had a bad swing...
  23. J

    John Deere 300B hyd. pump question

    Have recently inherited an older JD300B w/ loader, no backhoe but does have 3 pt hitch. When running, I can hear a noise from the hyd pump in the front when NOT under load. I'm not a mechanic so all help will be appreciated. Put under load and noise goes away. W/ load or not, the 3 pt will...
  24. A

    john deere 300b

    I was on the other day asking about these hydra. issuse I have. Somone said to see if any valves are getting hot. The line and valve going to the front bucket gets alittle warm the rest are cold. I guess this could be my internal leak. I have two questions. Is the front loader valve a closed...
  25. J

    John Deere 300B

    I am a new member on this forum. I own a 1970 300B John Deere. Last week, the front axle broke off where the kingpin joins into the axle. I can't seem to find an axle for it in South Africa (out of production at John Deere) and I'm thinking of importing a second hand front axle for the 300B...
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