Re clocking an alternator - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**slepysal** · 02-08-2007, 12:42 AM

How do you re clock an alernator ? It is a delco internal regulaed type. Any tips ?

60-66 Nut · 02-08-2007, 09:37 AM

It's very easy. Just remove the four screws that hold it together and remove the rear section with the windings. After you get it off, you'll see the brushes hanging out of the holder. Just push the brushes back down in place and stick a small allen wrench or something similar in the hole near the rear bearing to hold them in place. Then put the rear section back on in the position you want it, replace the screws and pull out the allen wrench. Hope that helps.

60-66 Nut

Shorty Cox · 02-08-2007, 10:19 AM

I'm just a dumb ole country boy, but what is the advantage of "clocking a alternator"? Does a alternator have a "upright" position?, thus only work if an internal device is upright?

Shorty

Bishops Trucks · 02-08-2007, 11:08 AM

All it does is move your wire connections to the position you want them at, top sides or bottom.

**slepysal** · 02-08-2007, 11:12 AM

The reason I want to re clock is that I am installing power steering,and a new internal regulated alternator. On the 6 cylinders the power steering pump sits over the alternator. The alternator I have has its plug a "3 O'clock",so it exits twords the motor,by re clocking it to "9'O'clock" it will put the plug twords the left fender.
Thanks 60-66 nut thats what I needed to know !!

60-66 Nut · 02-08-2007, 11:15 AM

Shorty, I'm about as "dumb ole country boy" as they get. I often say people should not call themselves country unless they know what fresh cow$&*# feels like between their toes. But to answer your question, yes, they will of course work in any position. The only advantage to re-clocking one is for mounting purposes only, to get the plug in a better location or to make the rear mounting hole line up with the thru bolt for those applications that require it.

60-66 Nut

Shorty Cox · 02-08-2007, 06:44 PM

66 Nut, I do know what cow$&!+ feels like between my toes. Had to wade it to get to be barn as a child. Also i've felt the thrill of chicken$&!+ between my toes. To tell you how "country" I am, I know what that white stuff on chicken$&!+ is!

I knew what clocking an alternator was, but just never felt the need to do so. Always been able to hook them up the way they are.

Shorty

**slepysal** · 02-08-2007, 09:31 PM

Thanks agian 60-66 nut . I hate to admit it , but I had forgotten how to do it !!! Any ways it's done, now just to install it this weekend. Thanks agian

60-66 Nut · 02-09-2007, 09:13 AM

You're very welcome, freind. Glad if I could help.

60-66 Nut

kwkenuf · 02-09-2007, 01:14 PM

No need to completely remove the case from the alternator and mess with the brushes. Just remove the bolts and rotate the front side to your desired position, then reinstall bolts....

texczech · 02-09-2007, 07:46 PM

If you are very careful you don't have to pin the brushes. If you look closely at the alternator you will see 2 aluminum housings and there is a darker part between them. after taking the 4 bolts out, you need to split the housings apart so you can rotate/clock the alternator plug side. Keep the sandwiched part, the dark part, as close to the rear section as you can, In other words, keep the middle part next to the rear section when doing the split, which may be only 3/16 of an inch, just enough to get the front part to rotate & clear. Use a small screwdriver to make the separation. Be sure to turn the pulley after you get it clocked and listen for strange noises, if there are scraping noises, then the brushes have jumped out, and then you have to pull it apart and ppin them in. REMEMBER THIS- if you decide to do a complete split of the alternator, please keep that middle darker section of the alternator next to the rear half of the alternator when you split it! PS the rear section is the housing that has the plug/terminals in it.

02-08-2007, 12:42 AM	#1
slepysal Registered User Join Date: Oct 2006 Location: San Jose NOR*CAL Posts: 3,080	Re clocking an alternator How do you re clock an alernator ? It is a delco internal regulaed type. Any tips ? Last edited by slepysal; 02-08-2007 at 01:38 PM.

02-08-2007, 09:37 AM	#2
60-66 Nut Professional Beer Tester Join Date: Aug 2004 Location: Louisiana Posts: 453	Re: Re clocking an alternator It's very easy. Just remove the four screws that hold it together and remove the rear section with the windings. After you get it off, you'll see the brushes hanging out of the holder. Just push the brushes back down in place and stick a small allen wrench or something similar in the hole near the rear bearing to hold them in place. Then put the rear section back on in the position you want it, replace the screws and pull out the allen wrench. Hope that helps. 60-66 Nut __________________ 60 Ford F100 Custom Cab 61 Apache Short Fleetside 64 C10 Short Stepside 65 C80 409 V8 5spd(X-Firetruck) 83 GMC 350 Olds Diesel 85 GMC Short Bed 86 GMC Short Bed 90 GMC R3500 Crew Cab 92 GMC 1500

02-08-2007, 10:19 AM	#3
Shorty Cox Registered User Join Date: May 2001 Location: Liberal, Ks, Us Posts: 1,091	Re: Re clocking an alternator I'm just a dumb ole country boy, but what is the advantage of "clocking a alternator"? Does a alternator have a "upright" position?, thus only work if an internal device is upright? Shorty

02-08-2007, 11:08 AM	#4
Bishops Trucks KEEP ON TRUCKIN' Join Date: Jun 2005 Location: Sterling, Va. Posts: 5,730	Re: Re clocking an alternator All it does is move your wire connections to the position you want them at, top sides or bottom. __________________ JIM '97 GMC Sierra K1500 '95 Chevy Silverado C1500 '71 Cheyenne Z71 / LT1 & 4-Speed SWB K/10 Father/Son Project http://www.youtube.com/watch?v=4l689JKXPnA http://67-72chevytrucks.com/vboard/payments.php "LIVIN' FREE FOREVER"

02-08-2007, 11:12 AM	#5
slepysal Registered User Join Date: Oct 2006 Location: San Jose NOR*CAL Posts: 3,080	Re: Re clocking an alternator The reason I want to re clock is that I am installing power steering,and a new internal regulated alternator. On the 6 cylinders the power steering pump sits over the alternator. The alternator I have has its plug a "3 O'clock",so it exits twords the motor,by re clocking it to "9'O'clock" it will put the plug twords the left fender. Thanks 60-66 nut thats what I needed to know !! Last edited by slepysal; 02-08-2007 at 11:14 AM.

02-08-2007, 11:15 AM	#6
60-66 Nut Professional Beer Tester Join Date: Aug 2004 Location: Louisiana Posts: 453	Re: Re clocking an alternator Shorty, I'm about as "dumb ole country boy" as they get. I often say people should not call themselves country unless they know what fresh cow$&*# feels like between their toes. But to answer your question, yes, they will of course work in any position. The only advantage to re-clocking one is for mounting purposes only, to get the plug in a better location or to make the rear mounting hole line up with the thru bolt for those applications that require it. 60-66 Nut __________________ 60 Ford F100 Custom Cab 61 Apache Short Fleetside 64 C10 Short Stepside 65 C80 409 V8 5spd(X-Firetruck) 83 GMC 350 Olds Diesel 85 GMC Short Bed 86 GMC Short Bed 90 GMC R3500 Crew Cab 92 GMC 1500

02-08-2007, 06:44 PM	#7
Shorty Cox Registered User Join Date: May 2001 Location: Liberal, Ks, Us Posts: 1,091	Re: Re clocking an alternator 66 Nut, I do know what cow$&!+ feels like between my toes. Had to wade it to get to be barn as a child. Also i've felt the thrill of chicken$&!+ between my toes. To tell you how "country" I am, I know what that white stuff on chicken$&!+ is! I knew what clocking an alternator was, but just never felt the need to do so. Always been able to hook them up the way they are. Shorty

02-08-2007, 09:31 PM	#8
slepysal Registered User Join Date: Oct 2006 Location: San Jose NOR*CAL Posts: 3,080	Re: Re clocking an alternator Thanks agian 60-66 nut . I hate to admit it , but I had forgotten how to do it !!! Any ways it's done, now just to install it this weekend. Thanks agian

02-09-2007, 09:13 AM	#9
60-66 Nut Professional Beer Tester Join Date: Aug 2004 Location: Louisiana Posts: 453	Re: Re clocking an alternator You're very welcome, freind. Glad if I could help. 60-66 Nut __________________ 60 Ford F100 Custom Cab 61 Apache Short Fleetside 64 C10 Short Stepside 65 C80 409 V8 5spd(X-Firetruck) 83 GMC 350 Olds Diesel 85 GMC Short Bed 86 GMC Short Bed 90 GMC R3500 Crew Cab 92 GMC 1500

02-09-2007, 01:14 PM	#10
kwkenuf Retrofit Management Join Date: Apr 2006 Location: Las Vegas, NV Posts: 73	Re: Re clocking an alternator No need to completely remove the case from the alternator and mess with the brushes. Just remove the bolts and rotate the front side to your desired position, then reinstall bolts.... __________________ My retrofit fleet -1966 Suburban 2002 Tahoe drivetrain, firewall, floor, chassis and interior in progress -1965 C-10 shortbed stepside, 2003 5.3/4L60E conversion. Power steering, tilt wheel, power front disc brakes, 2.5/4 inch drop, relocated fuel tank and battery, 2002 Silverado buckets and console. Swap Pics -1968 Camaro 95 LT1/4L60E lots o' mods Web Page -1961 Corvette project Corvette Corrections frame, C-4 suspension and brakes, 02 LS1/T-56, Never ending body workPics

02-09-2007, 07:46 PM	#11
texczech Registered User Join Date: Dec 2005 Location: Weimar, TX Posts: 1	Re: Re clocking an alternator If you are very careful you don't have to pin the brushes. If you look closely at the alternator you will see 2 aluminum housings and there is a darker part between them. after taking the 4 bolts out, you need to split the housings apart so you can rotate/clock the alternator plug side. Keep the sandwiched part, the dark part, as close to the rear section as you can, In other words, keep the middle part next to the rear section when doing the split, which may be only 3/16 of an inch, just enough to get the front part to rotate & clear. Use a small screwdriver to make the separation. Be sure to turn the pulley after you get it clocked and listen for strange noises, if there are scraping noises, then the brushes have jumped out, and then you have to pull it apart and ppin them in. REMEMBER THIS- if you decide to do a complete split of the alternator, please keep that middle darker section of the alternator next to the rear half of the alternator when you split it! PS the rear section is the housing that has the plug/terminals in it.



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