Kenny---- I know this is a cut chinese thread BUT!!!! have you ever seen a sims injection pump on the old 3000,5000,6600 and 5900 FORD Tractors. The oil has to be changed in them every 300 hours or so just like these little tractors. The oil gets deluted by the by-pass tolerance in the barrel and plunger area and if not change regularly it will cause the pump to seize up. There is no pressured oil supply to these pumps like it is on the newer 6610 models. I have seen several seized pumps in the last 30 years. They say that no one told them to change the oil in the pump. I point out the page in the operators manual and ask them if they read the book before operating the tractor. A little bit of research can solve alot of failures. Yours and mine!!!
first let me say I totally agree - the oil should be checked and changed per maintenance schedule,
But to use my 554 Rhino/Shanghai as an example, it has an inline pump (like the Simms on my Ford 3000)
When I purchased it, I noticed that it had no Breather cap and just a bolt . I pulled the bolt and removed the drain plug just a few drops of condensation and a few drops of rusty oil...
Apparently the factory assembled it this way- OOPS, and it was never checked (dad had it serviced at a local tractor dealership) When asked he said Knew nothing about changing the injector pump oil and that he didn't recall there being anything in the manuals about it
So with 20 years of running, and over a thousand hours run time the only ill effect was a slightly sticky rack..
Flushed it out, and changed out the fluid as needed since then, staying nice and clean now.
Bought the correct breather cap, my Ford always dilutes the injector pumps oil (but it does have many more hours).
The Rhino- even after all those years of use with no oil at all- and it does not dilute or leak any oil.
In this case- good Chinese injector pump quality, but no breather- and a bolt instead Can't vent and yet no blown seals or gaskets, and missed maintenance
as far as the pump seizing up - it wouldn't be due to the plunger assemblies- as has been mentioned they are lubed by the diesel itself -
but the bearings that support pump crank shaft and governor - that is an area where the oil is needed and somehow this one survived
The manuals were missing, and never did find dads originals for this Rhino-
so after purchasing them and finding the breather part#,
There is not one word about changing the injector pump oil- or ANY injector pump lube maintenance of any kind, in any of the 3 manuals... go figure, it seems to be the only glaring omission So if your in doubt, check it out- sometimes manuals don't have everything covered
in my case thank goodness for the Ford 3000s manual ... and good old TBN :thumbsup:
They are lubricated by fuel...That is ULSD is bad for older engines with mechanical fuel injector pumps and a additive should be used to increase "lubricity"
