HS / HL Valves & Systems Service Manual
Hankscraft Runxin, LLC 300 Wengel Drive 608.524.9465 hrh2o.com [email protected]
48
Replacing Piston Assembly
1.
Unplug electrical cord from outlet.
2.
Turn off water supply to system.
3.
Relieve water pressure in the system by putting the valve in the Backwash position momentarily.
4.
Return the valve to the In Service position.
5.
Pull cable out of meter cover.
6.
Remove the valve back cover.
7.
Remove screw and washer at drive yoke.
8.
Remove timer mounting screws. The entire timer assembly should lift off easily.
9.
Remove end plug retainer plate.
10.
Pull upward on end of piston yoke until assembly is out of valve.
11.
Inspect the inside of the valve to make sure that all spacers and seals are in place, and that there
is no foreign matter that would interfere with the valve operation.
12.
Take new piston assembly as furnished and push piston into valve by means of the end plug.
13.
Twist yoke carefully in a clockwise direction to properly align it with drive gear.
14.
Replace end plug retainer plate.
15.
Place timer on top of valve. Be sure drive pin on main gear engages slot in drive yoke (rotate
control knob if necessary).
16.
Replace timer mounting screws.
17.
Replace screw and washer at drive yoke.
18.
Return bypass to normal In Service position. Water pressure automatically builds in the system.
