Sounds like clock motor(s) are working.
Snap mechanism out using thumb spring located inside top of box.
Look for clock motor number printed on clock, should be WG1573 for 240V timer
Google search for 'Intermatic WG1573'
For example Grainger sells that clock motor as 1PNK2
(plus they sell extra trippers which are designed to wear down):
http://www.grainger.com/Grainger/timer-accessories/timers/electrical/ecatalog/N-8hi
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Notice that each clock motor has two white wires that connect to terminals. Those white wires connect to terminals. Test across those terminals to make sure terminals have correct power. If terminals have correct power, then clock motor is suspect. Intermatic has been offline for a couple days, so I wrote first answer without looking at specific manual. Right now, I'm looking at catalog page 43 for T40003RT3, and it shows 1 clock motor and 120Volts. Will you please double check your model number and also check clock motor number if it is WG1573 or WG1570. I may have given you wrong clock motor number and voltage in first answer. And then I will double-check wiring schematic for that model number, for conclusive answer. Also add if you have 120Volt breaker or 240V breaker that powers this timer.
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There are two timers/clock motors. Is it just coincidence they both are out at the same time. Is there something that send power to both?
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