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In article ,
says...
Quick question.
I have a new Dorsey trailer w/ surge brakes.
I checked the fluid level today when we got back from the lake and it looks
low.
What kind of fluid should I use to fill it - brake fluid or hydraulic fluid?
My FIL says hydraulic - but I think brake. I dont have the manual and I
cant find it online any where.
Thanks
Not sure what your 'FIL' is, but only DOT 3, or DOT 5 fluids would
be approved for road use. Dot 3 is far more common, and is an ignorant
choice by manufactures for use in and around water. It traps and holds
moisture, Then promotes heavy corrosion of the aluminum pistons in the
wheel cylinders. I could only hope that the boat trailer brake folks
went to 'hydraulic fluid'. Dot 3 is a bit yellow tinted, Dot 5 is purple,
and turns a bright antifreeze green when it is water contaminated, and
hydraulic can be clear such as power steering fluid, or redish such as
automatic tranny fluid.
I hope this info helps, please let us know, and I really do hope they
quit using caustic Dot 3 around the water!!
Guğmundur....(Icelander living in the states)
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