Doc No: OMM50002312
Rev: C Page 34 of 54
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10.3.4 Installation of Disc Valves
The suction valves must be installed before the discharge valves can be installed. The
following reassembly procedure is applicable for both.
1. Select a new valve assembly and check to ensure the taper on the valve is clean.
2. Carefully clean the taper in the fluid cylinder and on the valve seat with a cleaning
solution and a clean cloth. Small scratches can be removed with steel wool or 100
grit emery paper. Remove all dirt, grease, oil, water, or any other contaminants
from the surfaces. Do not oil the seats or the seating surfaces in the fluid cylinder.
Confirm they are dry before installation.
3. Position the valve assembly directly over the mating taper in the fluid cylinder.
4. Let the valve assembly drop into the taper. Check that the seat is sitting in the
taper properly and not cocked to one side. If the seat drops straight, it will seize
on the taper. When correctly seated, it cannot be pulled up by hand.
5. Place the appropriate installation tool on the top surface of the valve assembly.
The suction valves will require tool P534699 for the larger valves which can be
struck using a Ball Valve Knock Out Tool, P534695 or P534694, until the valve is
fully seated.
6. Repeat steps 1 through 5 for the discharge valve.
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