Product Manual A

Maintenance

62 MTP4000-6000DZV/DZD Operating Manual 31609 A

Valve inspection - If inspection of the valve is required, follow the disassembly instructions.

Figure 24 - Discharge Check Valve

Disassembly

The valve can be disassembled without removing it from the pump.

WARNING

The line must be drained before removing the cover or pressure may be released,

causing bodily harm.

To relieve pressure and drain the pump:

1. Remove the cover bolts from the top cover.

2. Pry the cover loose and lift off the valve body.

3. Remove the disc and inspect for cracks, tears or damage in the rubber sealing surface.

4. Clean and inspect the parts. Replace worn parts as necessary.

Reassembly

All parts must be cleaned. Gasket surfaces should be cleaned with a stiff wire brush in the direction of the serrations

or machine marks. Worn parts and gaskets should be replaced during reassembly.

1. Place the disc over the seat with the beaded seating surface directed down.

2. Lay the cover gasket and cover over the bolt holes and disc hinge.

3. Insert the lubricated bolts, noting that the bolts in the hinge area are longer than the others.

1. Cover bolts 4. Gasket

2. Disc 5. Check valve body

3. Cover

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