Operating instructions

A. PRESSURE DROP (new installation)
1. Inadequate water supply.
Adjust water regulator on intake (turn screw downward). Increase water
supply to 30 P.S.I. minimum.
2. Improper nozzle size.
Consult manufacturer.
3. Open solution injector.
Close injector solution supply valve when not in use.
B. PRESSURE DROP AFTER MACHINE IS IN SERVICE
1 Unloader cup or wall scored or worn.
Install a rebuild kit or replace unloader.
2. Pump piston cup worn.
Install rebuild kit.
3. Damaged piston cylinders.
Install water sand filter.
4. Worn nozzle.
Replace with correct or same size nozzle.
5. Air leak to solution injector.
Close solution injector supply valve or replace hose.
6. Loose pump drive belt (if applicable).
Adjust tension to achieve ½” movement of belt at mid-point.
7. Clogged pick-up in tank. Clear clog.
C. PULSATION IN HOSE (usually accompanied by a drop in pressure).
1. Open solution injector.
Close solution injector supply valve or fill solution tank.
2. Water supply shortage or clogged pick-up in tank.
Increase pump water supply, clear clogged pick-up..
Clean filter inside pressure regulator or screen in intake connection.
3. Defective piston cup.
Replace piston cups.
4. Stuck unloader piston
5. Obstruction in nozzle causing “false” unloader functions.
TROUBLESHOOTING
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