Dear friends, today i bought a used bobcat 763 G-series. I need your advice about what type of oil to use in engine and hydraulics... is it ok to use 20/50 for engine? thanks!!!
I'm not familiar with smaller diesel engines such as the one in your bobcat, but I would still say you need to put diesel engine oil in it. 20/50 is for gasoline engines. I use shell rotella T 15W-40 diesel engine oil, and you can typically buy it a Walmart too. Whatever you get make sure it is made for diesel engines and it is typically 15W-40.
OK, I just saw that you are in Greece. I don't think they have walmart over there. Or do they?
15w40 rotell is fine yeah just make sure its diesel engine also the hydraulic make sure it has an anti foaming agent in it
Thanks all of you for your interest! Of course i had in my mind to use oil for diesel engine. The matter is that here in Greece, machinery service and repair are far away from reality and many years back in comparison to other countries and especially to you. People here, traditionally, use 20/50 for diesel engines. Only few people, like me, may use 15/40 and only in newer machinery models, 2000 and after! So if i say to a machinery engineer that 20/50 is only for gasoline engines, he will laugh at me!!! Anyway thanks all of you for your good advices.You have just proved me that i am going to learn many things in this site!!! P.S. I am not sure about Walmart. Personally i have never heard!
Don't for get the new filters too...!
Of course, the new filters was the first thing i did! Please answer me a question about the hydraulic oil that is used about this machine. Is it 10w like the one that is used to auto transmission? Is this the reason which is written "hydrostatic" and not "hydraulic" on the cap where we fill the oil?
i don;t know the exact weight of the oil but anti foaming and the hydraulic hydrostatic question its all the same oil in there it runs from the resiovior to the gear pump to the hydrostat to the drive motors back to tank and the gear pump to the control valve to the oil cooler to the oil filter to the resivoir
Whoa guy's, slow down. We may be talking "apples and oranges" here. We, here in the US, have know idea how oil is classified in Greece. We can only offer info on how oil is classed here and hope it applies in Greece as well. The engine oil advice given to gpap is right on, I wouldn't recommend a 20/50 oil, I would stay with the 15w/40 oil, but as stated, it should be an API class oil for diesel engines, here's a link for more info on API classification; ( www.finalube.com/reference_material/API_Engine_Oil_Classifications.htm ). As for the hyd oil, we don't know the temerature range of the area, so it's hard to recommend the correct viscosity. As for using ATF fluid in Bobcat hyd system, I wouldn't recommend it. ATF has viscosity improvers which has a detrimental effect on removing air bubbles in "small reservoir tank systems" such a Bobcat. I would prefer using an API class "AW" hyd oil. If the ambient temp in Greece is 0 - 35 degrees C, an AW32 hyd oil should work fine. I prefer the AW (anti-wear) fluid as opposed to RO (rust & oxidation) fluid as AW has the same rust & oxidation additives as RO, but has a zinc additive as well to protect hyd components such as pumps and motors. Another note to gpap, Bobcat uses hyd fluid in chain case as well; not motor oil, ATF, or gear lube. Be sure to check your chain case oil. Make sure it's clean and not contaminated with water (white looking oil). The chain case is bad about condensation over time, especially in humid climates. Water contaminted oil in chain case will destroy components.
Thanks for your important advice dear atcoequip, Here in Greece we also use the API and SAE system to classify lubricants, but the quick word is for example 15w/40. In my region the ambient temperature is -5 to +40 degrees C, so an AW32 hyd oil should be ok. I am going to check up on water being contaminated the chain case oil. thanks again all for your advice!
hello, again! I am going to ask something specific but i am not sure to use the correct phrase... So, in order to "adjust" the valves of the engine (bobcat 763), i would like to ask if is there any information about the correct "interval space". I hope that it may be written in the user's manual which i do not have... any help should be appreciated... Sorry for my questions being a little "stupid"...
that's what i mean...
Thats not stupid at all and you explained it a million times better than I could begin to ask you in Greek. Very good picture. You want to know the Valve clearance,..... we know the experience is here, all we have to do is have a cup of tea and wait a moment.
What engine is it? brand and size are needed for accurate specs. You might be able to find them online.
i'm not sure about the 763 but the S185 2004 manual specifiy to use engine oil in the hydraulic system if the bobcat hydraulic fluid is not available... quote: bobcat fluid. if not available use sae 10w-30/10w-40 class se motor oil for temps above -18 celcius end quote the 2009 t190 manual mentions vg100, vg46 neither of which are suitable temperature wise, a synthetic hydraulic vg45/minimum VI150 and the bobcat fluid both being suitable. it makes no reference to engine oil for the temperature ranges you speak of in greece then a 15w40 is appropriate for the engine, api classification should be cd, ce, cf4, cg4, sg the manual i have open also mentions that 20w50 is recommended for temperature ranges 21-49+ celcius. api and sae are global specs fellas, there is a world outside america... :drinkup
My manual says to adjust intake and exhaust to 0.008 inches (0,20 mm)
it is a kubota V2203-E natural aspirated. I have powerful hydraulics but when i push it to a rapid steer or to go forward/backward at full speed, the rpm of the engine goes down... Yesterday we replaced the injectors and the valves of the diesel pump. There is a better response now but we think that we should check the valves clearance... BUT... my engineer do not know the exact clearance... So, tomorrow we will try to find out what is going on and i am going to inform you... thanks all for your interest and your help!
As NOBULL1 says 0.008 (0,20 mm ) COLD .There is a sequence to do it with only one revolution . a. With the rocker arm rocking (valves 7 & 8 )on No. 4 cylinder set clearance at No. 1 cylinder (valves 1 & 2 intake exhaust ) b. With the rocker arm rocking (valves 3 & 4 )on No.2 cylinder set clearance at No. 3 cylinder (valves5 & 6 intake exhaust ) c.With the rocker arm rocking (valves1 & 2 )on No.1 cylinder set clearance at No. 4 cylinder (valves 7 & 8 intake exhaust ) d.With the rocker arm rocking (valves5 & 6 )on No.3 cylinder set clearance at No. 2 cylinder (valves3 & 4 intake exhaust )
thanks for your help and quick response! the valves are ok now... BUT... there is a problem... the engine oil is contaminated by diesel... i think that the piston rings are responsible for this and it is caused by injectors which were in bad condition... is that possible if the engine is about 2600 hours??? i do not think so... personally i believe that the real operation hours are not 2600 but at least 5200!!! Anyway, tomorrow i will have an oil change and we will see... Thanks for your help, and thanks for reading my disappointing news....!
A leaking injector will let fuel into the oil.
The FIRST thing to check in this instance is injection timing. This is elementary diesel service knowledge. Maybe someone has been messing with your engine who shouldn'ta oughta been messing.....
ok, you are right. i will try to check it again... today i had an engine oil replacement, so we see!
If you are getting fuel into the crankcase and the engine seams to run fine check the fuel lift pump. I have replace a lot over the years.
i reply to myself!!! I had a new problem... i have replaced the pump which operates hydraulics of the lift arm and the bucket, because it was licking, and i replaced the hydraulic oil with bobcat hydraulic oil. The bobcat hydraulic oil is syitable for temps -35 - +65 Celcious So that is the best solution!
Here i am again... after more newer problems... my engine seems to oprate ok! About the engine oil i have used SAE 15w/40 bobcat engine oil, suitable for enviromental temperature -25 to +40 Celsious.
I love this place already...
The whole oil conversation caught my eye and i have a stupid question. I was always told to run 10/40 in the winter and 15/40 in the summer, is that a good idea? We are in Ohio and it is average of say 20 degrees in the winter and 80 degrees in summer. I have been doing that for all of our small diesels (ie skid loaders and man lifts 40-60 hp). I am curious and now i have to know thanks
One of the experts will give you a definitive answer but from my experience you are doing right, it will be intresting to see if you are advised to drop to 5/40 for the winter. It will really depend on just how cold you go The thinner oil in the winter eases the amount of drag on the engine at start up and allows for quicker and therefore better circulation of the cold oil. For sure you are not doing any harm IMHO. :drinkup