Hydraulic lifter adjustment

Is this typical of the correct adjustment for hydraulic lifters

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Holtvintage
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Hydraulic lifter adjustment

#1

Post by Holtvintage » Sat Nov 30, 2019 8:31 pm

I going to ask- I have new hydraulic lifters (mid-usa brand) I have never ran the motor, I use a little assembly lube when pulling the hydraulic unit in the tappet. In my OEM manual it said to adjust to no noticable shake, then extend till unit is full compressed, then turn up 1-1/2 turns. So I think I should use the dry method which sounds like the manual. After doing this I left it set overnight and I couldn't spin the pushrod with my fingers. Is this typical? I have a stock 1982 FLH. New pushrods, new tappets, new hydraulic units. I have the cam in the base position for the tappet concerned. The short question is should i be able to spin the rod by fingers when using the manual method?



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Re: Hydraulic lifter adjustment

#2

Post by Holtvintage » Sat Nov 30, 2019 8:33 pm

I pulled the hydraulic unit and verified that it is dry. Pushed the ball valve to collapse piston into cup .the unit spring is the only resistance .
The way I read this paragraph is to slowly turn rod down till the unit spring is near binding or the unit piston barely bottoms out in unit cup. Then shorten the rod by 1-1/2 turns =8 flats. Is this correct? Should I be able to barely turn the rod with my chubby fingers at this point ? It seem like a lot of tension to turn with fingers. My EVO was able to spin with fingers after 20 mins which was the sign that i could rotate motor.
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Re: Hydraulic lifter adjustment

#3

Post by Holtvintage » Sat Nov 30, 2019 10:24 pm

Here is what I think I've learned. I noticed that with a little effort I could screw the adjuster down with my fingers to overcome the hydraulic unit's spring tension. I could feel it bottoming out abruptly. To verify this ( for my own peace of mind) I took a open end wrench and pressed down at the adjuster to confirm no down play. Then i backed it off a 1/4 turn, checked downward and could feel movement. Now I know that by using just my fingers I could ( as the manual said " completely compressed " ) the unit. I again lengthened the adjuster till it bottomed out with my fingers and then shortened the adjuster 1-1/2 turns = 8 flats. To answer my own question, yes when properly adjusted I could spin the rod with my fingers. I couldn't precisely tell when the unit spring was fully compressed and the valve spring tension started by just using wrenches. I think i could tell i was getting valve spring tension but couldn't be sure when exactly. Hopefully this clarifies this task for the next novice shovelhead owner. If anyone with personal experience can clarify / correct something that I have written here please don't hesitate to say something. Thanks
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Re: Hydraulic lifter adjustment

#4

Post by RooDog » Sun Dec 01, 2019 5:35 am

Math, fellas, math: 1 1/2 turns with a hex fastener is 9 flats. I don't know haw many that would be in metric, I'm too old to learn that new fangled Millenium stuff.... LOL....
....RooDog....

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Re: Hydraulic lifter adjustment

#5

Post by Holtvintage » Sun Dec 01, 2019 3:01 pm

Thank you for bringing the typo to my attention. You are correct, 9 flats. I really need a secretary to proof read this stuff. Preferably a young redheaded one!

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Re: Hydraulic lifter adjustment

#6

Post by Buddhahoodvatoloco » Mon Dec 02, 2019 1:27 am

Need two wrenches and twenty fingers. :x :)
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