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You are here: Home > Repair Guides > 440, 440i Timer Repair
An obvious problem that can occur is for the timer motor to fail. The motors turn at 1 rpm, so it is quite easy to tell if it is turning. A more common problem is for one or more of the drive gears to strip. Removing the Tripper Arm screw, the Skipper Wheel screw and the three cover plate screws will gain you complete access to all components for careful examination. It is easier to work on your timer housing if you remove it from the valve body. Pull out the timer retaining pin ( 5F ), slide power cord out of it's retaining slot, unscrew Cam Shaft Bearing at rear of Cam Shaft, and then pull housing straight up.

Common Gears that Fail
1. TRIPPER ARM WHEEL # 99F ( 1031756 )*Most Common Gear to break at the 2-3am. Position
2. # 7 BLACK GEAR # 420A43 ( 1031554 ) *Gear that drives the Tripper Arm Gear, and often strips out at the same times as the Tripper Arm Gear breaks.
3. Red Knob Gear # 106H ( 1001582 ) * now "Black" closely examine the "over hang" teeth of the OUT PUT GEAR, as they sometimes snap off.
4. #8 BLACK GEAR # 420A44 ( 1030844 ) *Drives the Out Put Gear, and if stripped you can easily see this.

Also the "OUT PUT CONNECTOR" # 21E ( 1031496 ) or ( for newer 440i and 460i cases, the 1001833 ), 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 460TC ) at this point.

A complete replacement is recommended if the unit is over 20 years old.

The newest replacement timer is the 460TC ( runs on 12 volts AC using transformer 1000811 ... same transformer used with 440i models ),
see:The 460TC replaces all previous 440 Timer Assemblies.


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 ).

See for 255 valves: UPGRADE KIT 255/740 LOGIX ELECTRONIC REPLACING 440 SERIES TIMER

Or Performa 263, 268: UPGRADE KIT PERFORMA 740 LOGIX ELECTRONIC REPLACING 440I SERIES TIMER

460TC or Logix 740 - Which Timer Replacement is Best?







460TC 50 Hz International Timer Assembly 4001249
460TC 50 Hz International Timer Assembly 4001249
IN STOCK
Your Price: $120.00

460TC 50 Hz International Timer Assembly 4001249 Replacement 7 DAY Timer Assembly for 440 series, with 12 volt  50 Hz AC Transformer
460TC Replacement Timer Assembly for 440 series
460TC Replacement Timer Assembly for 440 series 4001085
IN STOCK
Suggested Price: $150.00
Your Price: $98.00

460TC Replacement 7 DAY Timer Assembly for 440 series, with 12 volt 60 Hz AC Transformer

Upgrade Kit 255/740 Logix Electronic replacing 440i series timer
740 Logix 255 Upgrade Electronic replacing 440i series timer
IN STOCK
Your Price: $144.00

Upgrade Kit 255/740 Logix Electronic replacing 440i and 440iHV series timer
Upgrade Kit Performa 740 Logix Electronic replacing 440i series timer
740 Upgrade Kit Performa 263 268 Logix Electronic replacing 440i timer
IN STOCK
Your Price: $144.00

Retrofit 440i timer with the 740 Logix Electronic Control Day Timer Assembly used on the Autotrol 263 and 268 Performa Valve.
Camshaft Out Put Connector Autotrol 21E or 1031496
Camshaft Out Put Connector Autotrol 21E or 1031496
IN STOCK
Your Price: $19.95

21E Output Connector used to connect to CamShaft on the 440 & 460 Timer Assembly.
Used on all 155, 163, 168, 255 timer assemblies.
Part Number 21E or 1031496.
Gear  Tripper Arm Assembly 99F
Gear Tripper Arm Assembly 99F
IN STOCK
Your Price: $14.95

99F Tripper Arm and Gear for Autotrol 440 and 440i Timer Assemblies.

Gear - # 7 Black 420A43 - 1031554
Gear - # 7 Black 420A43 - 1031554
IN STOCK
Our Price: $4.99

Black Drive Gear # 7, 420A43.
This gear drives the Tripper Arm Gear ( 99F ).
Gear - # 8 Black 420A44 - 1030844
Gear - # 8 Black 420A44 - 1030844
IN STOCK
Suggested Price: $4.99
Your Price: $3.99

Black Drive Gear # 8 .
This Gear Drives the large Red or Black Output Knob Gear.

Gear - Red or Black Output 440 Timer - 420B52, 1001583
Gear - Red or Black Output 440 Timer - 420B52, 1001583
IN STOCK
Your Price: $14.95

Red Output Gear for 440 and 440i Timer assembly used on some Autotrol 155, 1550-TC, 163, 168, 255, 263, 268.
Very old PN was 420B52.
NEW COLOR IS BLACK for this Gear ( newer PN in some manuals 1001583 ).
Identical to older Red version.
Gear 420A42 White Old 440 Timers AP420A42
Gear 420A42 White Old 440 Timers AP420A42
Usually Ships in 1 to 2 Days
Your Price: $9.95

White Gear 420A42 for Autotrol 440 and 440i Timer Assemblies.Used in older version, and not the 440iHV Revised version.

Limit amount in stock, as this is an obsolete item.

Gear Tripper Arm 6 Day REVISED PN 3007499
Gear Tripper Arm 6 Day REVISED PN 3007499
OBSOLETE

Gear Tripper Arm 6 Day REVISED PN 3007499
OBSOLETE
REVISED 7 Day Tripper Arm and Gear for REVISED Autotrol 440iHV Timer Assemblies made since January 2008.
Gear Tripper Arm 7 Day REVISED PN 3007520
IN STOCK
Our Price: $12.50

REVISED 7 Day Tripper Arm and Gear for REVISED Autotrol 440iHV Timer Assemblies made since January 2008.
Motor - Timer 115v 98F-1 or 1030846 or 1000376
Motor - Timer 115v 98F-1 or 1030846 or 1000376
IN STOCK
Your Price: $49.95

98F-1, 1030846,  1000376, and 420A56, are all part numbers for this 115 V, 60 Hz, 1 RPM Timer motor used in 440 Timer assemblies.
Six Day Skipper Wheel, 14F6, 1031740
Six Day Skipper Wheel 14F-6 or 1031740
IN STOCK
Your Price: $11.95

Six Day Skipper Wheel

Skipper Wheel 6 Day REVISED PN 3007523
Skipper Wheel 6 Day REVISED PN 3007523
IN STOCK
List Price: $14.99
Our Price: $11.95

Skipper Wheel 6 Day REVISED PN 3007523
Skipper Wheel 7 Day
Skipper Wheel 7 Day 14F-7 1031742
IN STOCK
Your Price: $14.99

Seven Day Skipper Wheel ( 14F-7 or 1031742 ) used on Autotrol 440 and 440i Timers
Skipper Wheel 7 Day REVISED PN 3007524
Skipper Wheel 7 Day REVISED PN 3007524
IN STOCK
List Price: $14.99
Our Price: $11.95

Skipper Wheel 7 Day REVISED PN 3007524
Transformer 120v/60hz to 12vac - 1000811
Transformer 120v/60hz to 12vac - 1000811 3019151 44149
IN STOCK
Suggested Price: $25.00
Your Price: $13.95

Transformer 120v/60hz to 12vac 60 hz used with many Autotrol valves in the U.S.A.
PN 1000811 and PN 3019151 and newest PN 44149