Operation
(HYDRAULIC-POWERED MODELS)
Starting and Adjusting the Pump
Supply fluid to the pump, per the requirements of your system.
Refer to Fig. 4 on page 10. Check the hydraulic fluid level before each use, and add fluid as necessary. Make certain that the supply line shutoff valve (U) and the return line shutoff valve (V) are closed, then start the hydraulic power supply.
Hold a metal part of the gun/valve (S) firmly to the side of a grounded metal pail and hold the trigger open.
Open the return line shutoff valve (V) first, then slowly open the supply line shutoff valve (U).
Cycle the pump slowly until all the air is pushed out and the pump and hoses are fully primed. Release the spray gun/dispensing valve trigger and engage the trigger safety. The pump should stall against pressure when the trigger is released.
If the pump fails to prime properly, open the bleeder valve (35) slightly. Use the bleed hole on the underside of the valve body (34) as a priming valve until the fluid appears at the hole. See Fig. 10. Close the plug (35).
NOTE: When changing fluid containers with the hose and gun already primed, open the bleeder valve plug (35), to assist in priming the pump and venting air before it enters the hose. Close the bleeder valve when all air has been eliminated.
WARNING
To reduce the risk of overpressurizing your system, which could result in component rupture and cause serious injury, never exceed 10 MPa, 103 bar
(1500 psi) Maximum Hydraulic Input Pressure to the pump or 15.9 MPa, 159 bar (2300 psi) Maxi- mum Fluid Working Pressure (see the Technical Data on page 35).
To prevent overpressurizing the hydraulic motor or its seals, always shut off the supply line valve (U) first, then shut off the return line valve (V).
CAUTION
Do not allow the hydraulic oil temperature to exceed 54_ C (130_ F). The pump seals will wear faster and leakage may occur if the pump is operated at higher oil temperatures.
Never allow the pump to run dry of the fluid being pumped. A dry pump will quickly accelerate to a high speed, possibly damaging itself. If your pump acceler- ates quickly, or is running too fast, stop it immediately and check the fluid supply. If the supply container is empty and air has been pumped into the lines, refill the container and prime the pump and the lines with fluid, or flush and leave it filled with a compatible solvent. Be sure to eliminate all air from the fluid system.
Shutdown and Care of the Pump
WARNING
To reduce the risk of fluid injection, do not use your hand or fingers to cover the bleed hole when priming the pump.
With the pump and lines primed, and with adequate hydraulic volume supplied, the pump will start and stop as the gun/valve is opened and closed. In a circulating system, the pump will speed up or slow down on demand, until the hydraulic power supply is shut off.
Use the fluid pressure gauge (F) and flow control valve
(G)to control the pump speed and the fluid outlet pressure. Always use the lowest hydraulic flow and pressure necessary to get the desired results. Higher pressures cause premature tip/nozzle and pump wear.
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 12.
For overnight shutdown, relieve the pressure. Stop the pump at the bottom of the stroke to prevent fluid from drying on the exposed displacement rod and damaging the throat packings.
Always flush the pump before the fluid dries on the displacement rod. Never leave water or
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