Mixing And Pumping - Strong GR4 Procedures Manual

Caution: DO NOT disconnect material hose with hoses under pressure. Always run pump in
reverse until pressure gauge read "0" PSI, or hoses become soft. Failure to do so could result in
blockage or material blowing out under pressure and striking someone causing bruises, cuts,
breaking of limb or possible loss or sight if material enters eye.
Attach water hose to water inlet at rear of machine. Attach wash down hose to valve near water
tank. The float switch must now be raised and set at the approximate water level by tightening
the set screw on the set collar. When the water level raises the float inside the tank, a switch
inside the float will disengage the water inlet valve.
After the tank has been filled for the first time that day, the water should be drained into the
mixer. Start the mixer.

2. Mixing and Pumping

With mixer door open and mixer running, allow this batch of water to discharge into holding
hopper over pump. Start pump and pump the water through discharge hoses, observing pressure
gauge to see that hoses are clear of obstructions. Any show of pressure indicates something in
hoses causing a plug. If plug exists, reverse pump to relieve pressure and remove plugged hose
and clean. This can generally be done by inserting a garden hose is the plugged hose and
washing out foreign materials. With hoses cleaned, mixing of materials can now begin.
Use the following procedure for mixing and pumping.
•
Once required water is in tank, open water tank discharge valve. Be sure that mixer door
is closed before opening tank discharge valve.
•
Engage mixer control valve. This starts mixer paddles turning.
•
Check to make sure mixer discharge door is closed.
•
Close discharge valve when the proper amount of water has been added to mixer.
•
Lower bucket to ground.
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