Teledyne Continental Motors, Inc.
TM
Torque
Specifications
IOF-550 Permold Series Engine Maintenance Manual
B-11
1 April 2007
Table B-4.
Component Specific Torque Specifications
Torque Value
SIZE
FASTENER
IN./LB.
FT/LB.
MODELS AFFECTED
.66-20
Nut-Alternator or generator
pulley
450-500
37.5-41.7
O-470, IO-470, IO-520 (AR), TSIO-520
(AR), TIARA (AR) IO-550, IOF-550,
TSIOL-550, TSIO-550.
{
Torque to low limit. If cotter pin will not enter, increase torque gradually up to high limit
only. If cotter pin will not enter in this range, replace nut and repeat.
IN NO CASE SHALL
NUTS BE TIGHTENED BELOW THE MINIMUM TORQUE LIMIT OR OVER THE
MAXIMUM TORQUE LIMIT.
Reference the most current revision of TCM Service Bulletin
SIL 93-15 as applicable for special instructions for cotter pinning the 360 model engine
connecting rods.
|
Strike outer periphery of coupling band lightly to distribute load. Then tighten to 50-60 in/lb. for P/N
641284 Clamp and 60-70 in/lb. for P/N 653832 Clamp.
}
Do not realign hex cap screw to suit tab washer.
~
Must be reworked to through bolt rocker shaft configuration in accordance with TCM
Service Bulletin M92-6 or current revision as applicable.
Align and tension belt in accordance with TCM Service Bulletin M89-6 or current revision as
applicable.
Crankgear must be heated to 300
°
Fahrenheit, then installed on crankshaft. Ensure the
gear seats tightly against the end of the crankshaft by tapping lightly with a brass hammer.
CAUTION: Improper heating of the crankshaft gear will result in
damage to the gear and may lead to subsequent engine failure.
The instructions contained in the latest revision of the appropriate
overhaul manual must be used for crankshaft gear installation.
Lubricate threads with Champion thread lubricant P/N 2612 or equivalent only.
(PART - A) P/N 530184 connecting rod (Identified by forging number 530186), P/N A35159
(identified by forging number 5561) and P/N A35160 (also identified by forging number 5561) must
be serviced as follows: P/N 530213 bolt, P/N 24804 or P/N 626140 Nut and P/N 639292 cotter pin.
(PART - B) P/N A36121 connecting rod assemblies utilizing the P/N 632041 forging must be
serviced in accordance with the part numbers indicated in the current technical data. P/N A36121
connecting rod assemblies utilizing the P/N 40742 forging must be serviced as follows: P/N 35972
connecting rod bolt, P/N 24804 nut and P/N MS24665-132 cotter pin.