Husky Air-Operated Diaphragm Pump 205

WARNING: To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure

Shut off air and reserve air to the pump.

Open the dispensing valve if the system has one.

Open the fluid drain valve to relieve all system pressure, and have a container ready to catch the drainage.

Remove the four screws that hold the valve cover on the center housing.

Remove the valve block and valve carriage, and replace the u-cups.

Replace the valve carriage and valve block. When you replace the valve carriage, position it all the way to one side or the other.

NOTE: The valve block shown in FIG. 5 is for pumps with an air-operated air motor. If your pump has a solenoid-operated air motor, this step does not pertain.

Clean any parts that are dirty.

Relieve the pressure, and disconnect the air line from the pump

Shut off air and reserve air to the pump

Open the dispensing valve if the system has one

Open the fluid drain valve to relieve all system pressure, and have a container ready to catch the drainage

Remove the eight screws that fasten the two fluid covers to manifold, and remove the fluid cover/center housing assembly from the manifold

Remove the six screws that fasten each fluid cover to the center housing, and pull the fluid covers off of the center housing

Remove the diaphragm plates from the shaft, and remove the diaphragms, and air-side diaphragm plates

Remove the diaphragm pins, remove and replace the o-rings, and reinstall the diaphragm pins in the center housing

Grease the length of the shaft, and slide it through the center housing

Check all hoses for wear or damage

Check all threaded connections are tight and free of leaks

Tighten or retorque as necessary

Although pump use varies, a general guideline is to retorque fasteners every two months

Sign off on the threaded connections tightening

CAUTION: Do not over-lubricate the pump. Excess oil is exhausted through the muffler, which could contaminate your fluid supply or other equipment.

The air valve is lubricated at the factory and designed to operate without additional lubrication.

Is the pump operating without additional lubrication?

If added lubrication is desired, every 500 hours of operation (or monthly), remove the hose from the pump air inlet and add two drops of machine oil to the air inlet.

Enter the number of hours of operation

Was the hose removed from the pump air inlet?

Were two drops of machine oil added to the air inlet?

Sign off on the pump lubrication

WARNING: To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure

Shut off air and reserve air to the pump

Open the dispensing valve if the system has one

Open the fluid drain valve to relieve all system pressure, and have a container ready to catch the drainage

Remove the eight screws that hold the fluid cover/center housing assembly on the manifold, and lift the manifold covers/center housing assembly off of the manifold

Remove and replace the check valves, being careful to orient each check valve exactly like the one it is replacing. Make sure the check valve/seat area is clean

Remove and replace the sealing o-rings. Once compressed, o-rings may not be reused. Make sure the check valve/seat area is clean prior to fully seating o-rings into fluid cover grooves

Reinstall the fluid covers/center housing assembly on the manifold, install the screws that fasten the fluid covers/center housing assembly to the manifold, and torque to 42-47 in-lb (4.5-5.0 N•m). See Torque Sequence