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3930 fluids question

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Scott#2

07-02-2003 18:48:57




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I ordered a big buck shop manual but in the mean time want to change all fluids on this diesel(non turbo, 2w.d.) tractor. I've been told that the rear and hyd's share the same fluid from the diff housing and the gearbox uses the same type hyd. fluid as the diff. Is this true? Also does the power steering use the same hyd fluid? If this is true, you only need 2 types of fluid for this machine. 15w-40 and hyd fluid... right?

On another subject, what is a good diesel fuel additive to use to maintain and help clean the injectors?

One more... I read about cavitation, what can I use to help prevent this over the long haul?

Thank You for all your help.

Scott

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rod

07-02-2003 19:26:50




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 Re: 3930 fluids question in reply to Scott#2, 07-02-2003 18:48:57  
Scott, you are correct about the oils. Manual says 134 in hyd, trans, and power steering. Most any hy-tran oil meeting 10w30 specs will do. Good quality diesel engine oil according to temp/climate. 15w40 is good most of the time.
As for fuel conditioner, I use KleenFlo. It works well. Any diesel fuel conditioner is better than none. Much the same with coolant cond. I use DCA which is available from NH dealer, but good conditioner can be picked up almost anywhere. Good luck

Rod

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Scott#2

07-02-2003 19:35:30




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 Re: Re: 3930 fluids question in reply to rod, 07-02-2003 19:26:50  
Thanks Rod, I didn't see any of that at the dealer today. I'll look again whenI go back. I'm just trying to clean this machine up and hopefully increase the longevity. So far so good. Thanks Again,

Scott#2



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JHEnt

07-02-2003 19:15:03




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 Re: 3930 fluids question in reply to Scott#2, 07-02-2003 18:48:57  
Cavitation is not really a problem with smaller engines. If you want to use a collant conditioner when you change the antifreeze.
134 hydraulic oil is used for all trans rearend and p/s functions. The hydraulic (center housing) and rear end have a common oil supply. Fill at the plug on the back and use the dipstick. I am thinking the transmsiion is separate but I would not say I'm sure about that. I know there is another fill plug on the trans shift cover but it may be common oil with the rest of the tractor.
There are any number of good diesel additives availible. I believe both Stanadyne and Delphi (rotary injection pump manufactures) have their own brands availible. But, and this is a BIG BUT, while a little does good, alot will gum up a pump. Only use the recommended amount on the container. If you use regular AG diesel (high sulfer) with red dye then an additive is realy not needed. using over the road diesel blue color then it would be helpful. The process of removing the sulfer from diesel removes alot of the lubricity of the fuel oil.

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rod

07-02-2003 19:44:09




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 Re: Re: 3930 fluids question in reply to JHEnt, 07-02-2003 19:15:03  
The tranmission and rear axle are separate. I don't know if cavitation was a widespread problem with 201's as fitted in the 3930, but I do have an old 201 around on the floor with the pinholes to prove it. Coolant conditioner as directed on the label is a good idea. Again, my area may be different, but there is no difference that I am aware of between off highway and over the road diesel. They are all low sulphur here, so fuel conditioner is generally needed. Also, I believe heating oil lacks a lubricant additive for inj pumps. Just my opinion, for what it's worth.

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Scott#2

07-02-2003 19:32:41




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 Re: Re: 3930 fluids question in reply to JHEnt, 07-02-2003 19:15:03  
Thanks for the info. I mainly wanted to use fuel conditioner to try to quiet down and clean the injectors maby for just a tank full. I been using #2 heating oil (red fuel) and since I have a neighbor who is a wholesale fuel dealer, he can fill the tank for cheap.

Thanks again,

Scott#2



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