hydro filter

[jinman]

Regarding your filter...
Are your Ingersoll's like the Teramites? I rented a 20 hp unit once and I thought it was a 20 hp Kohler engine. Do yours have Onan engines like someone mentioned in an earlier post? Anyhow, I suspect that you will be able to find some sort of transmission cooler/filter arrangment for auto/truck automatic transmissions. You might have to get additional lengths of hose. If you put one of these in the return line or in the suction line (low pressure), you should be "in business" for keeping cleaner oil. Have you ever noticed a lot of dirt in your 12 quarts of oil when you changed it? I'm just brainstorming here and you've already received good advice from others, so I'm just adding my two cents worth./w3tcompact/icons/crazy.gif

Here are filter assemblies from Chief and Prince:

 

[s1120]

<font color=red>Have you ever noticed a lot of dirt in your 12 quarts of oil when you changed it?</font color=red>

No but I have only changed it once. Just don't want to get to that point. Pumps are pricy./w3tcompact/icons/frown.gif

 

[s1120]

<font color=red>What is the idle speed for the 16HP onan motor ?</font color=red>

tbarber,
Sorry cant help you on that. Mine has a single cylinder Kholer.

 

[jinman]

Tbarber, my Onan manual says both the B43M-16hp and B48M-18hp engines have an idle speed of 1100 +or- 100 rpm. For the Marvel Schebler carb, the speed is 1100 rpm and with a Walbro or Nikki carb it's 1000 rpm. I hope this helps.

 

[tbarber]

I found out what was wrong with the idle speed. Someone droped a small wrench in between the govenor arm, and the engine case.That took care of all the problems/w3tcompact/icons/smile.gif
Thanks for the help.
Tom

 

[DocBezdek]

Hi Paul,
I'm replying to this even though it is not a recent post because I am going through the same kind of exercise on my 1969 Case 442.
There is a filter screen in the system, it's just impossible to see and nearly impossible to clean, and when it's full of dirt, it gets destroyed because there's no pressure relief. The screen is located inside the reservoir tank on the older models. If you examine the tank, you'll see that it is formed from two deep-drawn halves which are soldered together in the center. The filter screen is spot-welded into position prior to the tank being assembled. If you look closely at the exterior of the tank, you can see the spot welds. The screen completely separates the left hand side of the tank from the right. When fluid flows from the cooler into the tank, it must pass through the screen prior to flowing to the pump. Any dirt that the screen catches remains there forever unless the owner removes the tank and flushes it. The screen on my tank came loose from its spot welds and settled over the tank outlet, thereby severely restricting the flow and causing the pump to cavitate. I removed the screen and am going to add a return line filter if I can't find a vintage tank with an intact screen (I'd like to keep my tractor original).
These screens probably protect the system for a period of time, until they load up and provide a sufficient flow restriction to be torn loose from their welds. They are probably also stressed by cold fluid as there is no pressure relief. This kind of catastrophic failure would also dump the entire load of debris immediately into the system. Some failure mode huh? I can't complain too much as I've owned this tractor for 33 years, and the hyraulics have never given trouble before.
In summary, add a return line filter and if the pump ever cavitates, look in the reservoir for a broken screen.
As far as a separate filter, size for the pump flow plus allow extra because return flow will exceed pump flow when using hydraulic cylinders, such as a loader or log splitter. 20 g.p.m. should suffice. Make sure the filter head has a pressure relief. If you get creative with hose, you can package the thing almost anywhere, but only on the low pressure side of the system.
Steve

 

[s1120]

Steve,
Thanks for the reply. My tractors are the newer style, right before they changed to the 3xxx, and 4xxx Ingersolls. These have a plastic hydro bottle with no screen. I still have not put the filter in, this will be a project for next winter, during the down time. For now I just keep the system full, and change it every year.