Re: Bitin' My Tounge

Posted by K.B.-826 on December 21, 2004 at 18:22:00 from (209.163.30.65):

In Reply to: Bitin' My Tounge posted by Allan in NE on December 20, 2004 at 13:43:07:

Allan, nothing wrong with plugging the flow-rater into the couplers. Here's the way I learned to do it-

1- Run the engine at about 1500 RPM, tie the remote on demand, and turn the knob to restrict the pressure until it shows about 1200 psi, and at the same time, make sure that the flow guage shows flow. The pressure builds heat to warm the oil, but you don't want too much pressure right now, or you won't get enough circulation to get the system good and warm. Once the oil gets to 120 degrees, back out the restriction knob to 0 psi, run the engine up to rated speed, which would be 2600 RPM on your Black Stripe 966.

2- Check the flow guage- it should show around 12 gpm, mabey a little more, but not much less. This is called "free flow"

3- Now crank that restriction knob down and get as much pressure as you can. This could be anywhere from 1800-2500, because there are about four different relief valves that will fit your 9. At this point, you will have zero GPM flow.

4- Now back your pressure off about 250 psi from your maximum reading and check the flow guage. It should read at least 80% of your free flow.

If all of this checks out, you're good to go. If the max. pressure is low, the relief valve needs attention. If you don't have 80% of free flow at 250psi below max psi, the pump is shot. Hydraulic testing should never be done at low idle, since you've got a positive displacment pump, its output will be greatly effected by speed.

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