Instruction Manual

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Hypro recommends a blue thread locking compound on all threaded fasteners that do not require lock washers.
1. Locate the discharge manifold on the 9910-DP423, 9910-DP573 & 9910-DP763 (Ref. 68). With o-rings (Ref. 53)
lubricated and in position on control valve body (Ref. 52), plug into discharge manifold. Lock into place with retainer
clip (Ref. 60).
2. Connect bypass hose to elbow (Ref. 45) and run unrestricted to supply tank.
3. Connect the desired number of high pressure hoses to the outlet hose barbs. Unused hose barbs can be shut off with
ball valves provided.
For all discharge hoses, use hose with an operating pressure rating equal to or greater than the maximum
pressure rating of the pump. High pressure clamping should be used on all outlet hose connections.
Hypro recommends a blue thread locking compound on all threaded fasteners that do not require lock washers.
1. Install mounting bracket (Ref. 15) in desired location and secure with bolts (Ref. 12), washers (Ref. 13) and nuts (Ref.
14); then attach the control to the bracket.
Always wear safety goggles when working with spring-loaded fasteners or devices.
2. With o-rings (Ref. 35) lubricated and in position on the control valve body (Ref. 26), plug it into the inlet adapter (Ref.
5); then lock it into place with retaining clip (Ref. 28).
3. Connect the NPT tting on the discharge manifold of the pump with the NPT tting on the control unit with the high
pressure hose.
4. Connect the bypass hose to the elbow (Ref. 11), then run it unrestricted to the supply tank.
5. Connect the desired number of high pressure hoses to the outlet hose barbs on the control valve. Unused hose barbs
can be shut off with ball valves provided.
For all discharge hoses, use hose with an operating pressure rating equal to or greater than the maximum pressure rating
of the pump. High pressure clamping should be used on all outlet hose connections.
Operating Instructions
1. Be sure oil is halfway up to the clear oil sight tube. If necessary, ll to the correct level with Hypro oil (part number
2160-0038). Hypro oil is a specially formulated, high-grade, non-detergent, SAE 30 weight oil formulated to prolong
pump life.
2. Make sure the suction hose barb is tightly screwed onto the suction union and that there are no air leaks on the inlet
side of the pump.
3. The relief valve bypass port should be connected back to the liquid tank without restrictions. Do not hook bypass line
back to the inlet port or inlet hose.
4. Allow the pump to start under low pressure by removing restrictions on the outlet of the pump.
5. Start the pump and let it run for approximately one minute at low pressure; then stop the pump and check the oil level
in the sight glass. Add Hypro oil if necessary.
6. Adjust the pump to the desired pressure by changing the relief valve setting on the control unit, relief valve or
unloader.
Set the pressure control to the pressure setting; then rotate the pressure regulator to the desired pressure.
Form L-1385 (05/14)