Pushrod adjustment

Picked up a 97 Classic, base gaskets were leaking. Tore it down and now putting it back together it has adjustable pushrods (not known what brand) what would be the safe way to adjust them. If my memory serves me correctly, was it 16 flats after contact.

Tom

take it to zero lash if rocker boxes are still off set a dial indicator on the rocker and set them to 0.60 after zero lash. if your not sure about the flats . or you can look up the setting on the andrews web page if you know the thred per inch.

Diff mfg has different number of turns. Normally its like 2 1/2 turns if'n I remember correctly but you got to consider bleed down too.
Find out who makes the pushrods and get their directions.
A indy shop knows.

Harley adjustabl pushrods, N-gin - YouTube

Here is a simple way to set adjustable pushrods without instructions....if you don't have the TPI(threads per inch) measure an inch and count the threads...

Copied from Big Boyz site....This formula will tell you how many wrench flats to turn...you can divide the wrench flats by 6 to get how many full turns...I prefer that way because you can mark 1 flat and it's easier to count 3 full turns rather than 18 flats on a 30 TPI push rod...





To adjust pushrods that you may no longer have the instruction sheets for or may have come in a bike when purchased, you can figure out the adjustments as follows.

The number of flats to turn the nut for proper pushrod adjustment can be calculated easily. First you have to find the number of threads per inch (tpi) on the adjusters. To do this simply measure 1 inch of threads and count them.

The tappet plunger moves aproximately .190" and the adjustment is in the middle or at about .100". To figure the number of flats for a .100" adjustment, use the following formula... number of flats=.100"/[1"/(tpi*6)]
For example, an adjuster turned 3 turns (18 flats) @ 30 tpi will make the pushrod .100" longer.

30tpi*6=180 (Threads per inch TIMES 6 = 180)
1"/180=.0055555 (1 inch DIVIDED BY the answer from above, in this case 180)
.100"/.0055555=18 flats (.100" is the amount of desired pushrod movement DIVIDED BY the answer from above .0055555 and EQUALS the number of wrench flats to obtain the desired adjustment.)

To further explain this....
tpi TIMES 6 gives the total number of wrench flats in 1" of the adjuster. 30tpi TIMES 6 wrench flats per thread EQUALS 180 wrench flats per inch.

1 inch DIVIDED BY the total number of flats (180) EQUALS the amount of travel for 1 wrench flat (.0055555")

Total travel desired (.100") DIVIDED BY the amount of travel per wrench flat (.0055555") EQUALS the number of wrench flats to achieve the desired travel (18 flats).

Thats the long technical explination. The easy way is to take the number of threads per inch and multiply by .6
For example ....
24tpi TIMES .6 EQUALS 14.4 flats
30tpi x .6 = 18 flats
32 x .6 = 19.2

And this will give you the correct adjustment for any manufactures adjustable pushrods that are used with stock style hydaulic lifters.

If I have to do a lot of calculating I'm not going to keep up.
I'm a Redneck It has to be easy.

Adjusting Pushrods - YouTube

I waited on you fer a week and wound up doing it myself.
I'm Lazy, but I can't wait too.

Not a lot of calculating moving a decimal point 1 place to the left:roflmao:.... 24TPI= 2.4 complete turns to preload the lifter at .100"
30TPI=3 turns
32TPI=3.2 turns

Its easier to just take a automatic center punch and hit them and stick some color on it. Then I can see what I'm doing.

I already forgot how to move decimel points anywhere.
Redneck's ain't interested in deceimel points .........
Yer just trying to complicate things.
Like instead of doing things to all torque ranges now you gots to drag a angle gauge in the program to confuse Older people.
http://www.restockit.com/torque-ang...urce=theFind&bvar5=FIND&bvar6=FIND&bvar7=FIND

and you can'tre use head bolts on things like Chevy Vortec heads. ONce they are torqued, they are not reusable. When you pick them up they are lighter than regular bolts.
When I used to build car motors they had stars to represent how strong they was. Well I guess they quit using those. WE live in a disposable world.
WTF.
If I don't do things on a regular basic I forgit them.
And I have to sit down and remind myself . Sometimes just doing it reminds me while I'm doing it.

youse boys is funny !!!!! as long as there is preload on the lifter you are ok ! min 0.60 to 100 thou your ok if it ticks when hot go another flat its a hydro . think about a solid shovel adjustment turn them till the push rod just touch and your done no feeler gauge no thousands if they were to tight you had a valve hanging open . and a miss hydrolifters are very forgiving!

thanks for the input, found out the manufacterer 2 1/2 turns

thanks again