440 Tripper Arm Gear Repeatedly Breaking After Replacement.
Last Updated: 05/12/2016
Why Does Tripper Arm Gear Keep Breaking
Repeated failure of the Tripper Arm Gear ( and /or the # 7 gear that drives it ), is caused by the timer assembly "binding" internally.
The gears get "sloppy" over time, and the # 8 drive gear will start rubbing against the Output Gear center hub.
This added pressure makes the already difficulty job of the Tripper Arm Gear impossible.
It's pushing the Skipper Wheel, which in turn is pushing on the "tab" of the Output Gear, and the Camshaft must also be turned a little, before the Output Gear "catches" the Drive Gear # 8, and the motor turns moving everything.
It's a very common problem as the 440 timer "ages", and best solved by complete replacement of the Timer Assembly with the newer 460TC ( the current replacement for all 440 series timers ).
Common Gears that fail
Also the "Out Put Connector" # 21E ( 1031496 ) which which attaches to and drives the Cam Shaft can crack or break. On rare occasions the Camshaft # 21F-3 ( 1031950 ) will break at one end. Also, rare is a cracked Skipper Wheel # 14F-6 ( 1031740 ). Close examination of both sides of the Skipper Wheel is required to detect this failure. And last, but not least, you can have a gear post break in the housing body it's self. But only the back plates for the 440i version is available and not the "box" used with the older 440 version. It is simpler and prudent to replace the Complete Timer Assembly ( with the new 440iHV ) at this point.
The newest replacement timer is the 460TC ( runs on 12 volts ),
And now available for Models 255,263 and 268 is the Logix 740 upgrade timer kit ( does NOT work with the older 155, 163, or 168 valves... sorry ).
> # 1 FAQ = High Water in Brine Tank - Problem -Softener does not remove the water from my salt tank or overflow
> 440iHV Timer Assembly WARRANTY Policy of Softenerparts.com
> Autotrol 155 or 255 - How to Tell Which You Have
> 440 Timer Rebuilding / Repair / fix Guide
> Backwash Plug Number - Autotrol How can I tell what number of backwash plug I need?
> Brine Refill Problem - No water in salt tank - Autotrol
> 740 and 760 Logix Timer Programming Instructions
> Autotrol Valve Flow Rate Problem - Either Resin in Tank or Valve Discs not Opening Enough
> Autotrol Valve Leaking to Drain after Replacing Valve Discs
> Brine Refill after Autotrol 155 or 255 Repair
> Freeze Damage to Air Check Body Autotrol 255
> By Pass - Autotrol Old Style - How to Use
> Performa Valves Keep Breaking 440i Timers - Solution is...
> 440i motor replacement guide
> 460i Timer RESET if it is Regenerating EVERY NIGHT
> Setting Time of Day with the Autotrol 440 Tripper Arm Gear 99F
> Water Soft WSCB-32D water softener = Autotrol Valve Links
> Technetic - Series 1010 Bypass Valve
> 440 or 440i - Which Timer Assembly Do I Have - How to Tell
> Air Check Autotrol Old 36F or Newer Style - How to Tell - How to Clean
> 440i Sticking in Backwash or Brine Refill
> Err 3 on 740,742,760, or 762 Logix Timer
> Hard water when Autotrol Valve is working and using Salt properly - By Passing the RESIN?
> 440 or 440i - Manual Cycle Times if Motor Bad or No Power
> 940 and 960 Timer Obsolete - Replacement Options when used on 255 Valve
> Technetic 1000, Plus, 1100i replacement Valve Recommendation
> Air Check - Ball seated or dropping early during the BRINE/SLOW RINSE portion on the 155 or 255 Series Valve
> 460TC or Logix 740 - Which Timer Replacement is Best?
> 440 Upgrade to 760 metered demand Logix Timer - How?
> Autotrol Date Codes - Serial Numbers
> Options - Rebuilding or Replacing your Autotrol 255/440 Valve
> Calender Over Ride setting for 760 and 762 Logix Timer Programming
> Backwash Plug and Injector Cap Removal Tool
> 460TC Timer Off Set When Multiple Valves Used
> NovRam, 460i and 460TC timers - What is the difference?
> Top Distributor Modifications - MD1203 used with Performa 263 and 268
> Fittings Measurements Different Then Expected ( 1/4 and 3/8 fittings )
> Autotrol 155 with 440 Upgrade to 740 Day timer or 760 metered demand Logix Timer - How?
> Gears, Housing, Motor Inside the 460i and 460TC timers - What is the difference?
> Autotrol 155 ( 1550-TC ) Valve Leaks - How to solve them
> How To Repair A Logix Controller - Replacing Back Up Capacitor on the Board
> Model 172 and 180 are Obsolete - Commercial Autotrol Valves and Parts
> By Pass - Autotrol Old Style - Leaking When Connected to New Autotrol Valve
> Screen shows 1.1 on 740,742,760, or 762 Logix Timer - Button Test Mode
> Can an Autotrol 255 valve be converted from softener use to filter ( carbon ) use?
> Model 363 and 368 Autotrol Valves and Parts
> Turbulator - Why Would Someone Use This Over A Standard Bottom Distributor Basket / Riser Pipe?