Unique Rapid Rinse version Main Gear And Shaft For Fleck 5600 6 day back wash valves with metal pin / roller at end that pulls the main piston up and down, part # 19171.
Used a lot on MacClean and CUNO backwash only valves .
** Similar to, but not a direct replacement for the 13170 **
*** SPECIAL - only order if you are 100% sure this is the part you need.
This is the only gear that normally "breaks" on a Fleck 5600.
1 ) First, remove "power head" from the valve body. Three screws ( one in the Main Gear, center of Main Piston, and the TWO on either side of Main Piston ), slide forward slightly and then up.
2 ) Back of power head,
a ) Remove Brine Cam Gear
3 ) Front of power head,
a ) Remove label on the center of the control knob to expose flat head screw underneath
b ) WHILE HOLDS THE MAIN GEAR in place ( don't let it "fall out" the back ) while you remove the screw in the center of the control knob on the front
c ) Once the Screw is out, TURN the power head face DOWN, and slowly LIFT the Main Gear Shaft UP and Out.
NOTE: Under the Main Gear you will find TWO small Ball Bearings sitting on TWO small springs.
IF you have the New Main Gear Shaft in hand, now would be the best time to slide it into the power head.
HOLD the new Main Gear from behind, and put the front knob ( and actuator gear or arm, 24 hour wheel, etc ) back in place ( everything only "fits" the correct way ).
Screw the knob to the Main Gear.
4 ) ALIGNMENT******
Only "trick" to doing this is the replacement of the Brine Cam Gear.
The "hump" on the Brine Cam Gear must be aligned with the "gap" in the Main Gear.
This alignment occurs 1/2 turn ( 180 degrees ) from the IN SERV position ( or the middle of the Brine Rinse Cycle ).
* If you do it correctly, you will be able to turn the front knob and "run" the power head through ALL the cycles with out it getting STUCK in the middle of the Brine Rinse cycle.
5 ) Put the Power Head back onto the Valve Body. Replace the Three screws.
Remember to set the Time of Day on the Front.