I installed a new Intermatic timer, model # T8805P101C, it works manually but the wheel doesn't turn to automatic set timings

1) Trippers can wear down. Transformer can go bad if model has 24Volt output. Relay can go bad.
http://waterheatertimer.org/pdf/How-to-Set-and-Troubleshoot-Intermatic-sprinkler-timer.pdf
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#sprinkler

2) Add a comment Feb 2013 with model number, and include if this is new timer or older timer that worked before and stopped working.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

T8805p101 is 120Volt timer with 14-day skipper wheel that is made for sprinkler systems or pumps up to 1/2Hp.
Copy following links for wiring diagram, manual, and general instructions for setting and repairing T8805p101.
http://waterheatertimer.org/How-to-wire-Intermatic-sprinkler-timers.html#T8805
http://waterheatertimer.org/pdf/How-to-Set-and-Troubleshoot-Intermatic-sprinkler-timer.pdf

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Something doesn't sound right.
I have two of these timers and cannot figure out what your timer is doing, unless wiring is wrong or timer is defective, or you connected timer to 3-way switch.

15070 is single pole analog timer that requires neutral wire.
Slide switch is set to 'Timer' for automatic timer functions.

Open following links to identify timer and see wiring and how to set analog timers:
http://waterheatertimer.org/GE-timers-and-manuals.html#15070
http://waterheatertimer.org/images/GE-15070-wiring-1-500.jpg
http://waterheatertimer.org/How-to-set-timers.html
http://waterheatertimer.org/images/Woods-59017-mechanical-timer-300.jpg
http://waterheatertimer.org/Woods-timers-and-manuals.html#59017

Timer that worked before and stopped working: could be clock motor or trippers
New timer installation: possibly the wiring from breaker box and wire to Load are reversed.

Open following links to troubleshoot Intermatic timer.
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timer.html
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

If clock is rotating on time, next suspect is P47 trippers have worn down. Trippers are made of softer metal so they wear down instead wearing down the on-off lever, and that way the timer lasts longer.
http://waterheatertimer.org/Tork-timers-and-manuals.html#1101
http://www.frontierlighting.com/find.jsp?a=1&ID=,Photo.Cells...Time.Controls,Replacement.Trippers

New replacement Tork 1101 120Volt timer can be purchased on-line at Amazon etc.
Home Depot sells the 120V GE 15306 indoor-outdoor version of Tork 1101 timer.
http://waterheatertimer.org/GE-timers-and-manuals.html#15306
Replacement timer in Intermatic is T101
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T101

More information is needed.

Open following link for Intermatic-Malibu resources:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

You say clock doesn't work.
Add a comment with following information:
Do you have timer with analog dial?
Does dial rotate as time passes?
Does dial keep good time?
Have you put the black and red trippers in place?
Are trippers push all the way down?
Have you set current time by rotating clock dial 2 full turns before rotating dial to current time?

Intermatic/Malibu ML series timers come with 5-year warranty.
Product is covered by warranty.

Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

That is a 120 volt timer with a 24 volt output .. if the valves are being activated manually but the clock wheel is not turning to select the zones automatically, first check the wheel . it can become hung up when setting the time, and not be set on its spindlle so it can rotate with the clock motor. If the clock wheel is set and still does not turn, then the clock may be bad

Please vote !!

intermatic model t8805p101c need wireing diagram from braker box to pump thank you

Usually the timer motor is bad when that happens. You can purchase a new timer motor here (or at a similar website):
http://www.aplussupply.com/intermatic/timer.htm
If you don't want to mess with replacing the timer motor can can buy another time clock and as long as your existing enclosure is still in good shape, just swap out the guts.