COMMON VALVE QUESTIONS & ANSWERS:
HOW DO I HOOK UP THE VALVE? Inlet and outlet are marked on the directional
valves. For standard
valves hook up diagrams are shown on the bottom of the box . A and B (C, D, E and F if applicable) ports go to the cylinder ports. For VS and SD series see the box or call CROSS. WHAT VALVE SHOULD I USE FOR LIFTING? I HAVE A JOHN DEERE. ( or any other closed center system). For safety, a
valve with a load check (Series AD/SA, BA or SS) is necessary in order that the load does not drop before it begins to raise again when you are shifting out of the neutral position. The load check is a spring loaded poppet which prevents the oil from backflowing until enough pressure is created to raise the load. WHAT VALVE DO I NEED FOR A LOADER? HOW DO I HOOK UP SEVERAL VALVES IN SERIES? WHAT IS THE #1V0294 DETENT KIT? This manual detent fits the SBA or CONVERTA. The
valve handle (and spool) stays wherever it is placed until moved by the operator. The most popular models are the SAF2 and SBAF2 which have a float position on the first spool allowing the oil to circulate to permit the bucket to ride the contours of the ground. The second spool is for a two way cylinder and is spring centered to neutral. Others are the SA22 and SBA22 which are spring centered to neutral on both spools but feature no float. SS
valves may also be used for loaders. CAN I USE A STANDARD VALVE? All SA and SBA
valves are convertible to closed center by installing a closed center plug and no relief plug as shown in literature shipped with the
valve. Valves may also be ordered already converted to closed center. These
valves feature a tighter spool to mimimize creeping. Replace the conversion plug on the outlet side of the SA or SBA
valve with a power beyond sleeve. Connect this line to the inlet of the second
valve. Run a tank line from the outlet of the first
valve (has priority) back to the reservoir. HOW DO I CHANGE THE RELIEF OR BYPASS SETTING ON A VALVE? Always use a pressure gauge in the inlet to assure precise results. An SBA
valve may be adjusted by turning the adjustment screw under the acorn nut on the handle end of the
valve. Clockwise will increase pressure. The CONVERTA or CA relief is shim adjustable. The spring in older CONVERTA and CA
valves is rated to 1750. To increase the pressure to 2000 a different spring (#1A0685) plus shims (1A0682) are necessary. Do not exceed the recommended psi for the
valve. CAN I PUT A FLOAT OPTION ON A STANDARD VALVE? No, the end of the spool as well as the lands are different so a standard
valve will not accept a float detent. Spools are matched to the individual
valve bodies so changing a
valve spool in the field is not feasible. CAN I PUT A PRESSURE KICKOUT ON A STANDARD VALVE? Pressure kickout or automatic return to neutral requires a special internal machining which must be done at the factory when the
valve is manufac-
tured. (It is a standard feature on the SCD2E - logsplitter
valve.) CAN I USE A STANDARD VALVE FOR A SINGLE ACTING CYLINDER? No. A standard double acting (sometimes called 4-way) has no place for the pump oil to go as you are exhausting or lowering the cylinder. Consequently, the oil goes over the relief and overheats the system. Valves with spools for single acting ap-
plications may be special ordered from the factory. The CONVERTA is convertible to single acting. HOW DO I IDENTIFY A VALVE? The CROSS computer stock number is stamped on the handle end of the
valve body on all
valves manufactured since 1989. On older
valves the "Z" casting number is on the back side of the
valve. HOW DO I INSTALL PIPE FITTINGS? Never use teflon tape...a pipe port is a tapered thread and it is very easy to crack a casting if teflon tape is used. Use of liquid pipe sealant is the only approved installation method. Torque values are as follows: 1/2" NPTF - 32 to 40 ft. lbs.; 3/4" NPTF - 40 to 48 ft. lbs. 17
