Forum Discussion
hipower
Jul 18, 2016Explorer
GMCK154X4 wrote:
What type of fluid do I need to use in my hydraulic system reservoir?
I just replaced the lines and the filter and it looked like it had ATF in it. I've read that it should use 10w-40 oil and also read ISO-32 hydraulic fluid. It's a 1993 Newmar Kountry Star with an 8.3 Cummins on a Spartan chassis.
My '03 Dutch Star uses the ISO-32 hydraulic fluid. It isn't what I would call a widely stocked fluid, but any hydraulic parts dealer usually has it. Difficult to find in anything smaller than five gallon containers and even harder to get in my reservoir since the clearance is extremely tight for the filler. I use a cheap Harbor Freight hand pump to accomplish the refill.
There is a decal on the reservoir on mine that specifies the fluid type.
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