TCS900003, Rev.6
04/26/2016
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Page 43
¡WARNING!
All internal pressure must be relieved to ZERO (0) pressure before beginning disassembly
of meter or components
Disassembly of 750-30 Hydraulic Valve
1)
Drain all fluid from metering system prior to valve removal.
2)
Using a hex or socket wrench, remove the four screws connecting the valve to the meter.
3)
Remove valve from meter and piping.
4)
Place valve on flat surface with valve outlet facing downward.
5)
Slowly loosen the four screws located on the valve cap. You should feel force from the
compression spring on the valve cap.
6)
Completely remove three bolts on the valve cap first. While holding the valve cap down, then
remove the remaining bolt until you feel no more force from the compression spring.
7)
The components are in the cap and will come out of the valve housing.
8)
To remove the cap assembly, remove the four cotter pins (this is only needed when replacing
spring or cup).
9)
To replace the flat washer, remove the retaining ring on end of guide shaft.
10)
Turn outlet of valve so that is facing upward.
11)
Remove the two screws that hold the guide and seal.
12)
Remove the retaining ring from one side of the valve shaft.
13)
Remove shaft seal, bearing, O-ring, inner bearing and inner O-ring.
14)
Inspect and replace parts as needed.
15)
Press down on the valve housing so that the valve piston is forced in and pushing the valve shaft
handle away from valve housing.
16)
While keeping pressure on the valve, remove the swivel pin.
17)
Slowly release the valve until spring exerts no pressure. As the valve housing is lifted, the piston
and spring should slide out of valve housing.
18)
Inspect piston and seals, clean and replace as needed.
