Cub Crafters CC18-180 Maintenance Manual page 311

(g) Tighten the attaching bolts in small increments, moving diagonally across the bolt
circle. It is good practice to check the blade track frequently while tightening the
nuts. Take care to tighten bolts on opposite sides of the blade, centerline, evenly
so blade-to-blade conformity of angles is maintained. Torque all bolts to the
values as specified in Table 2.
Over-tightening propeller attaching bolts will cause the wood of the hub to crush,
breaking its moisture seal, and slightly reducing drive-torque.
(h) Check the tip track of the propeller. The track should be within 1/8".
(i) Since a small part of the wood compression is plastic (permanent), it is good
practice to loosen the bolts and allow the wood to relax for an hour. Retighten
following the same procedure. Install .040-safety wire. It is good practice to wire
the attaching bolts in pairs (not a continuous wire), twisting the wire in a
tightening moment between bolt heads.
Manual number TC10000AMM
Date: 07/18/12
CUB CRAFTERS, INC.
CC18-180 MAINTENANCE MANUAL
ATTACHING INSTALLATION TORQUE
Minimum
275 in-lbs.
23 ft-lbs
31 N-m
Table 2 - Wood Propeller Installation Torque
CAUTION:
Maximum
325 in-lbs.
27 ft-lbs
37 N-m
60-00
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