Frigidaire Top Loader Washer,Belt Drive,No Agitation,but does Spin,etc--Timer or Motor Problem?

Frigidaire Washer & Dryer Stackable Combo, Top Loader,Belt Drive,Direct Reverse Motor,3/4 hp, Heavy Duty, Top Loader, 2 speed
Model number tag is unreadable! But I have entered a similar mdl no: FEZ831AS2,which has exactly the same cycle times,the Timer Terminals are labelled the same as mine & the Wiring Diagram is very similar to mine!

There is no problem with spinning, filling or draining in any cycle. The lid switch, lid lock & pressure switch all work.
The Block [Agitator Drive Hub] is not the problem.
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SYMPTOMS:
After the tub first fills & agitation should begin: There is no movement of the timer,agitator,belt or pulley & no sound!
[no clicking of the timer,no motor humming or grinding]. Pushing & pulling on the timer to reset it doesn’t help.
The problem is the same For all 3 cycles [Delicate,Colors & Whites.]
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NOTE:When this stalling happens: the Agitator Does Turn Properly when I manually push the belt & pulley clockwise,as for agitation.
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I then have to manually advance the timer [past agitation] :
& the timer works properly to: 1] drain the tub, 2] spin ,3] fill for deep rinse

4] The same problem occurs during the second agitation of each cycle!
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QUESTION: Is this problem caused by the Timer? [the Timer IS #131758600]

OR... the Attachment 42093Attachment 42094 Direct Reverse Motor may be the problem,but the Motor does work in the Spin [CounterClockwise] direction,so it seems unlikely to fail in the Agitate [Clockwise] direction. The timer controls this reversal of motor direction.
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I have attached my wiring diagram, which I understand farly well.

via Frigidaire Top Loader Washer,Belt Drive,No Agitation,but does Spin,etc--Timer or Motor Problem?
by R H