Bissell HS-20 DISASSEMBLING AND REASSEMBLING THE COLD CAP Refer to Figure, Maintenance

Maintenance

a.Disconnect all water cooling lines and break the primary circuit supplying power to the pump heaters.

b.Unbolt the inlet and foreline connections and remove the pump from the system.

c.Drain the pump of all fluid.

d.Remove the cold cap and jet assembly following the procedures outlined.

e.Thoroughly clean the pump body interior using acetone followed by an isopropyl alcohol rinse. Dry with clean, dry, oil-free compressed air or heat gun.

f.Thoroughly clean the jet assembly using acetone, wipe all surfaces with isopropyl alcohol, and dry with clean, dry, oil-free compressed air or heat gun.

g.Install the jet and cold cap in the pump body. Ensure that the ejector is properly aligned with the foreline.

h.Check the condition of the O-rings and replace them if necessary.

i.Reinstall the pump in the system.

3-4 DISASSEMBLING AND REASSEMBLING THE COLD CAP (Refer to Figure 3-1)

1To disassemble the cold cap:

a Remove the female coupling, nut, follower, and gasket located at the end of the cold cap water line on the outside of the pump.

b Remove the cold cap securing screw which secures the cold cap to the jet assembly.

c Lift out the cold cap.

2To reassemble the cold cap:

a Insert the end of the cold cap water line into the cold cap port opening at the side of the pump before setting the cold cap on top of the jet assembly. Be careful not to damage the sealing surfaces.

b Replace the cold cap securing screw which secures the cold cap to the jet assembly.

Do not overtighten the screw.

c Replace the gasket, the follower, the nut, and the female coupling to the side of the pump.

3-3