Operation
Starting and Adjusting the Pump
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 7.
See Fig. 5. Be sure the air regulators (F, G) and bleed- type master air valve (B) are closed. Do not install the spray tip yet.
On cart mount units, place the suction tube (7) in the fluid container.
On wall mount units, screw the bung adapter (18) into the container's bung hole. Slide the suction tube assembly (J) through the bung adapter and into the container. Position the tube so the intake housing (1) is about 1/2 in. (13 mm) off the bottom of the container. Tighten the thumbscrew (26) to secure.
On pail mount units, fill the pail (46) with fluid. Set the cover (36) on the pail and secure with the latches (40).
Open the drain valve (H) to prime the pump. Open the
Slowly open the pump air regulator (F) until the pump starts. Run the pump slowly until fluid comes from the drain valve (H). Close the drain valve and continue to run the pump until all the air is pushed out of the fluid lines. Release the gun trigger and engage the safety latch; the pump will stall against the pressure.
With the pump and lines primed, and with adequate air pressure and volume supplied, the pump will start and stop as the spray gun is triggered and released.
Relieve the pressure, then install the spray tip in the gun.
Use the pump air regulator (F) to control the pump speed and fluid pressure. Always use the lowest pressure necessary to achieve the desired results. Higher pressures waste fluid and cause premature wear of the pump packings and spray tip.
Keep the packing
±no tighter. Always relieve the pressure before adjusting the packing nut.
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 you 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 supply container and prime the pump and lines with fluid, being sure to eliminate all air from the fluid sys- tem, or flush the pump as described in Shutdown and Care, below.
Shutdown and Care
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 7.
Always relieve the pressure whenever you shut off the pump. Stop the pump at the bottom of its stroke to keep fluid from drying on the exposed displacement rod and damaging the throat packings.
Always flush the pump with a compatible solvent before fluid can dry on the displacement rod, and at the end of each day. Relieve the pressure after flushing.
