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Planned maintenance
August 2019
After the previous steps have taken place, assemble the control valve per the instructions
in
Mechanical
8.3.1
Cylinder disassembly
Procedure
1. Remove the nuts that secure the cylinder head to the valve body.
2. Alternately tighten the jack-out screws until the cylinder assembly is free to be lifted
out of the valve body.
3. Lift the cylinder assembly by the cylinder head. Remove it from the valve body and
set it in a vertical position with the cylinder head on top.
4. Before removing the spring cover screws, place the cylinder assembly in an arbor
press to immobilize the spring cover on top of the cylinder head. This is to prevent
sudden spring pressure from being released and causing injury or damage.
SPRING PRESSURE HAZARD
Follow the instructions in
Failure to comply may cause release of spring pressure, resulting in serious injury
or equipment damage.
5. Use an Allen wrench to remove the screws that secure the spring cover to the
cylinder, and then gradually release the arbor press to remove the spring cover from
the cylinder head.
6. Remove the valve spring from the cylinder.
7. With the cylinder in a vertical position (ports located on the top part of the
cylinder), place the piston, nose end up, into the recess between the cylinder and
the seat ring. Use an arbor press to push the piston into the cylinder, thus freeing
the seat ring from the cylinder.
50
assembly.
CAUTION
Step
4.
USER MANUAL
User manual
DAN-20064957
707 Spring Loaded Back Pressure Valve
www.Daniel.com
39
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