Cub Crafters CC18-180 Maintenance Manual page 310

Cracks
(d) If cracks are evident on the hub face, take a razor blade and very gently try to
insert the corner of the blade. Most cracks will be paint cracks only, however, if
the tip of the razor easily goes into the crack more than 1/16-inch than the
propeller must be returned to the factory for closer inspection.
Bolt Hole/Counterbore Elongation
(e) The bolt holes and counterbores will naturally elongate since the wood will shrink
and expand differently with and against the grain. When inspecting the
counterbores, look for a ridge at .375-.75" deep in from the mounting hub face
that would indicate that the flange drive bushings were hitting against the side. If
any bolt hole elongation or ridge height inside the counterbore is more than
1/32", then the propeller MUST be returned to Sensenich Wood Propeller factory
for closer inspection and the attaching bolts MUST be replaced.
(f) Inspect the spinner aft bulkhead and engine flange for fretting. If the fretting is
severe and cannot be dressed out with emery cloth then the parts must be
replaced.
(g) Clean the flange face for reinstallation.
(4) INSTALLATION
(a) Installation of the propeller requires front and rear faceplates, spinner assembly,
attaching bolts, and washers.
(b) Be certain that the magneto switches are off and that both magnetos are
grounded.
(c) Install the aft bulkhead on the crankshaft flange making sure there is an
insulating gasket on both sides. Position the aft propeller plate over the flange in
front of the bulkhead.
(d) Position the faceplate over the front of the propeller and insert the bolts with
washers.
(e) Position the propeller on the engine flange in most convenient position for hand
cranking and tighten the bolts "finger tight."
(f) Using a standard ratchet, tighten all the bolts using a star pattern until the
propeller and spinner assembly is snug.
60-00
Page: 8
CUB CRAFTERS, INC.
CC18-180 MAINTENANCE MANUAL
Manual number TC10000AMM
Date: 07/18/12