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General Category => General Discussion => Topic started by: Woodrow on September 16, 2019, 09:19:11 AM

Title: Changing timing gears in a 850 T
Post by: Woodrow on September 16, 2019, 09:19:11 AM

I hope someone can advise .  Im changing the aluminum timing gears out of a 850T and replacing them with a original chain and sprockets .

  I have the oil pump gear off,, and the crank gear nut off,, also the  timing gear nut off .  I have the timing marks lined up on the crank gear and timing gear .   

    Im hoping that if I install the chain and sprockets with the timing marks correct ,  all should be good .  Right ?
   
   Do I need to back the spring pressure off the cam by backing off the rocker arms ?   I am nervous that the cam will turn when I pull off the cam gear .   Do i need to be nervous ?

   Thats it.  I think a cleanout of oil sump and a oil flush should do the job .   

Woodrow

Title: Re: Changing timing gears in a 850 T
Post by: guzzisteve on September 16, 2019, 10:07:13 AM

Yes, be safe, only do it once. Pull rockers. AND keep an eye on shaft movement if it has curved gears or pull as a group. When you get done w/chain placement check w/degree plate on crank.

Title: Re: Changing timing gears in a 850 T
Post by: pete roper on September 17, 2019, 01:58:00 AM

If the left pot is set up at TDC compression the timing marks on the sprockets should align and the cam won't move.

Pete

Title: Re: Changing timing gears in a 850 T
Post by: jacksonracingcomau on September 17, 2019, 02:56:12 AM

If gears are straight cut and marked A.D. i’d.like to buy if poss. Pm me