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techtalk:evo:engmech02 [2019/09/23 20:14]
hippysmack [Pinion Gear]
techtalk:evo:engmech02 [2020/05/28 16:35] (current)
hippysmack [Checking Lifter Pre-load]
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 ===== Sub-Documents ===== ===== Sub-Documents =====
   * [[techtalk:​evo:​engmech02b|91-99 Lifter Pin Upgrade to 00-05 Lifter Pin Screws]]   * [[techtalk:​evo:​engmech02b|91-99 Lifter Pin Upgrade to 00-05 Lifter Pin Screws]]
- 
-See also in the REF section of the Sportsterpedia:​ 
- 
   * [[techtalk:​ref:​svcproc16|Hydraulic Lifter - Disassembly / Inspection / Assembly]] ​   * [[techtalk:​ref:​svcproc16|Hydraulic Lifter - Disassembly / Inspection / Assembly]] ​
  
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 The new lifters were identified with the presence of two notches opposite each other in the pushrod socket. \\ The new lifters were identified with the presence of two notches opposite each other in the pushrod socket. \\
  
 +===== Checking Lifter Pre-load =====
 +
 +Hydraulic lifters self-adjust over about a .100" range, from .050" preloaded to .150" preloaded. ((aswracing of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=1720575)) \\
 +They'​ll actually work outside that range but they might make noise, so it's best to stay in that range. \\
 +
 +  * **Measure at the rocker box how much the lifter will get preloaded at the rocker box**. ((http://​www.hammerperf.com/​ttpushrodlength.shtml))
 +    * Put your pushrods in place (remember, the longer one goes on the exhaust).
 +    * Set the gasket and rocker box on top, and start the four big screws only.
 +    * Finger tighten the left (spark plug) side. \\ (while making sure the right side is resting with the upper pushrod ends sitting in the cups on the rocker arms)
 +    * Now take a simple caliper and measure how much gap you have between the rocker box and the rocker box gasket, as shown in the photo below.
 +    * This won't be an exact answer, but it'll be pretty close. \\ Remember, you'd like to see the plunger preloaded about .100", but anywhere between .050" and .150" should work. \\ You can order pushrod lengths that are longer or shorter than your stock pushrods by the amount it takes to achieve .100" of lifter plunger preload. \\ If you don't have a caliper to measure your stock pushrod lengths, the information is available in most factory service manuals. ​
 +
 +
 +
 +The lifter plunger should be preloaded between .050 and .150. Make the measurement if you're not sure. \\
 +{{:​techtalk:​evo:​engmech:​checking_lifter_preload_by_aswracing.jpg?​direct&​300|}} ((photo by aswracing of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=113818)) \\
 ===== Oil feed to lifters ===== ===== Oil feed to lifters =====