Hydroslave questions

backman

Captain
Joined
Jul 9, 2012
Posts
915
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Location
Falmouth, Ma
Boat Make
Northern Bay 36
I have a Hydroslave pump and hydraulic steering system off the PTO pulley on my engine. It has a cooler with its own throughhull and scoop.

Questions:

1. How much HP does this take from my engine output?
2. Is the load constant or does it increase w/ RPM's or with the rudder being turned?
3. I measure the copper pipes connected to the pump and reservoir at 140-150 degrees F back at the dock. Is this "normal" and if so what is abnormal?
4. I hear a pft pft pft from the system at idle; there is a slight leak/drip only at the junction of pump and stainless block on top of the pump. Is this telling me I have air in th system?
 

Kaiser

Lieutenant Commander
Joined
Sep 3, 2012
Posts
139
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60
HP depends on pump size and in general a hydro pump is 20% inefficient. meaning 3 hp pump will take 3.6 hp to run

the pump is pumping back to tank unless there is a demand on it

140-150 is acceptable in a hydro system. 200 is not

pft pft pft could be a check valve dumping pressure but get that checked

hydro systems should be dry. Bone dry.
 
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