How do I adjust my push rod?
Pushrod Adjustment
- Bring Cam to Base circle for the tappets you wish to adjust. Rotate the engine.
- Adjust the pushrods. Bring pushrods to Zero lash, no up and down movement, tight against rocker arm, and tight against tappet/lifter.
- If you cannot spin the pushrod, you have S&S Limited Travel tappets (HL2T kit).
How do you adjust a push rod?
Bring Cam to Base circle for the tappets you wish to adjust. Rotate the engine. Watch the intake valve open (pushrod goes up) and then close (pushrod goes down). Continue rotating slowly until the cylinder’s piston reaches top dead center (TDC).
How do you adjust a pushrod on a bike?
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.
What should the thread pitch be on a pushrod?
Stock cams I set the pushrods at .125″ or so. Regardless, you need to know what thread pitch your pushrod threads are to adjust them properly. TPI = threads per inch. To find this, simply use a thread gauge, or count the threads in a one (1) inch section.
What’s the zero lash on a Harley Davidson pushrod?
“Zero Lash” is the point where there is no up/down play and but pushrod can still be turned easily using your oil covered thumb and index finger. From that point, the pushrod is adjusted (extended) the required number of turns or wrench flats to set the plunger in the approximate center of the tappet’s travel.
How do you install an Andrews adjustable pushrod?
How-To video on Andrews adjustable pushrod installation. Bob LaRosa and Mark double check lifter installation and place the lifter all the way down in the path of travel on the backside of the camshaft, the base circle. They install new o-rings and then the pushrods. Take your time and adjust each one correctly.
How do you adjust the pushrod on a Harley Davidson?
Turn your motor, by hand, and position the lifter you are adjusting to its lowest point of travel on the cam. Next, extend your adjustable pushrod until you have zero lash (adjust by hand until you pushrod is seated, but without collapsing the lifter).
How many turns can an adjustable pushrod do?
Next, extend your adjustable pushrod until you have zero lash (adjust by hand until you pushrod is seated, but without collapsing the lifter). Next, (depending on the manufacturers instructions) you may be instructed to extend the pushrod another 2 1/2 to, maybe, 3 full turns.
“Zero Lash” is the point where there is no up/down play and but pushrod can still be turned easily using your oil covered thumb and index finger. From that point, the pushrod is adjusted (extended) the required number of turns or wrench flats to set the plunger in the approximate center of the tappet’s travel.
Stock cams I set the pushrods at .125″ or so. Regardless, you need to know what thread pitch your pushrod threads are to adjust them properly. TPI = threads per inch. To find this, simply use a thread gauge, or count the threads in a one (1) inch section.