Power steering fluid

[luvrbus]

I have no idea the book on Shepperd just says it is not compatible with the system probably the o-rings and seals

[eagle19952]

what color is the fluid that you have now...Dexron is red.

[Lin]

I have hydraulic assist steering.  When I first got the bus, it was low on fluid and I put ATF in without doing any research.  I have since heard that other options would be better, but since this works without any noticeable issues, I have just left it as is.

We installed an integral system on my last bus.  I think the box was Saginaw with a Ross pump.  We put ATF in it and it did work but there was always a hum coming from the box.  I was told that replacing the ATF with hydraulic fluid or motor oil would do away with the hum.  I never got around to trying it though since once underway, you could not hear the hum anyway.  Just to be clear, the hum was not from air in the system.

[John Z]

Congrats wildbob24. Your post may be the best I have seen on here in a long while. Good practical "how to do it" advice, simply written and completely understandable. Thanks.

[sdc53]

My 4107 has ATF in it. I had read that sheppard didn't like ATF, but I don't know if I have a sheppard unit.  Do the comments above apply to 4107's as well?  I'm pretty sure I have a box with an arm coming out of it under there for the steering.