Max-Prop Zerc Fitting — Installation Instructions
INSTRUCTIONS
How to drill and tap a Max-Prop spinner half to take zerc plug set screws and the zerc tower for greasing, with the kit contents and the drilling location on two and three blade propellers.
DocumentMax-Prop Zerc Fitting Installation Instructions
FormatPDF · 1 page · 0.6 MB
LanguageEnglish
Parts Included
- 13/64" drill bit (1 ea)
- 6mm x 1mm tap (1 ea)
- 6mm x 1mm zerc plug set screws, 8mm length (2 ea)
- 6mm x 1mm thread zerc tower (1 ea)
- 3mm Allen wrench
PYI takes no responsibility for damage to the Max-Prop while using these instructions; they are a guide to the sequence and locations only.
Where to Drill
- Drill the half of the spinner that does NOT have the stop: part #7A in Figure 1.
Drilling and Tapping
- The pitch is adjustable: make sure the pitch setting is known before the propeller is taken apart.
- Disassemble the propeller and remove the two spinner halves.
- Set spinner half #7A in the vice of a drill press, level, with the internal bearing surfaces facing up, and secure it so it cannot move.
- With the 13/64" bit, drill through the two bearing surfaces marked "*" in Figure 2.
- De-burr both holes.
- Turn the half over and re-secure it with the outside of the spinner exposed.
- Holding the 6mm x 1mm tap parallel to the drilled holes, turn it 5½ turns; remove the tap and clean out the shavings.
- Fit and tighten one set screw per hole, flush or slightly inset.
- If a set screw stands above the outer surface, remove it, cut one more complete thread with the tap and refit it flush.
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