In a message dated 11/21/2006 12:58:30 A.M. Central Standard Time,=20 randylsnarr@yahoo.com writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>I am=20 using the suzuki samuri alternator with the
voltage reg removed. I have= a=20 seperate Ford style
regulator. The battery is an RG25 by concord.
As=20 for the low side hydraulic pressure, shouldn't that
side be open to the= =20 resevoir when the gear is up
keeping that side at 0? I am not entirely=20= sure=20 how the
hyd pump operates as it relates to pressure on the
oppisite=20= side=20 of the system when it is running.
When I originally installed and teste= d=20 the gear I
could open the dump valve and move a gear leg by hand
up=20= and=20 down with little resistance. Now when I do the
same thing (open the dum= p=20 valve on the jack stands and
push the gear up by hand) I notice there i= s=20 some
resistance or building pressure as the gear leg is
pushed up in= to=20 the wing. I am not sure what has
changed or if this is normal. With the= =20 dump valve
open, what would cause the building resistance? I
would t= hink=20 that whatever the position of the gear,
the opposite side should be ope= n to=20 the resevoir at
the pump.

I am not familiar with the alt/reg/bat combination that you are=20 using. You may also want to check Concord specs for the charging volta= ge=20 and make sure that the regulator is in the required range as there have= =20 been plenty of stories about the consequences of regulator output not matchi= ng=20 the requirements of the battery.

Yes, the opposite side should be zero pressure. The dump valve ha= s=20 failed to resolve cases where the pressure on both the up side and down= =20 side are high enough to not allow either motor power relay to engage nor ble= ed=20 off any pressure and usually manifests itself by not allowing the pump to be= =20 activated to raise the gear. Remember that the dump valve short= =20 circuits the fluid path to bypass the pump altogether and connect the up and= =20 down sides of the actuators together thus allowing free flow of fluid even i= f=20 the total system pressure keeps either pressure switch from connecting power= and=20 that is a pump problem. However, the gear should still free fall=20= -=20 certainly the nose gear pushed by the 100# gas spring and the spring opened=20 doors - or allow one to hand raise the main gear with the volume of flow bei= ng=20 the only resistance. Could there be blockage in the system not associa= ted=20 with the pump? You may want to isolate components to test for restrict= ions=20 in or out a component. ?????????????