Component Specific Torque Specifications - CONTINENTAL AIRCRAFT ENGINE A-65 Maintenance Manual

Size Fastener
.44-20 Nut, Cylinder to Crankcase
Through Studs
.44-20 Nut, Front & Rear Crankcase
Bearing Through Studs
.44-20 Nut, Through Bolt at Cadmium
Plated Washer
.44-20 Nut, Through Bolt at Cylinder
Flange
.44-20 Nut, Through Bolt at Cylinder
Flange
.44-20 Nut, Through Bolt at Front
Mount Belt-Driven Alternator
.44-20 Nut, Tie Bolts at Nose and
Prop Shaft Cages
.50-20 Nut, Crankcase Through Bolt
at Cadmium Plated Washer
.50-20 Nut, Crankcase Through Bolt
at Cylinder Flange, P/N
634505 (6 point/0.33" tall)
.50-20 Nut, Crankcase Through Bolt
at Cylinder Flange, P/N
652541 (12 point)
.50-20 Nut, Crankcase Through Bolt
at Cylinder Flange, P/N
649496 (6 point/0.43" tall)
.50-20 Nut, Crankcase-Nose Tie Bolts
.50-20 Nut, Through Bolt at Cadmium
Plated Washer
.62-18 Plug, (using crush washer)
.25-28 Bolt, Gear to Camshaft
Bolt, Gear to Crankshaft 
.25-28
1
(P/N 22532)
Bolt, Gear to Crankshaft 
.25-28
(P/N 534904)
.31-24 Bolt, Gear to Camshaft
.31-24 Bolt, Gear to Crankshaft
(Lower Hardness Identified
with Green Dykem)
Standard Practice Maintenance Manual
15 April 2016
Table B-2. Component Specific Torque Specifications
Torque Value
In.-Lbs.
400-450
490-510
440-460
490-510
590-610
490-510
340-360
615-635
690-710
790-810
790-810
640-660
690-710
190-210
140-160
140-160
170-175
1
240-260
240-260
1
Models Affected (Non-standard, see
Ft.-Lbs. General Torque Specification)
33.3-37.5 A Series, C-75, C-85 & C-90
40.8-42.5 O-200
36.7-38.3 All Models (AR)
40.8-42.5 All (AR) EXCEPT IO-240, IOF-240, & 360
49.2-50.8 All IO-240, IOF-240, & 360
40.8-42.5 All Models (AR)
28.3-30.0 GO-300
51.2-52.9 IO-346, O-470, IO-470, TSIO-470, 
GTSIO-520, IO-520, L/TSIO-520, IO-550,
IOF-550, TSIO-550, & TSIOF-550
57.5-59.2 All IO-346, All 470, All 520 & All 550 
EXCEPT TSIOL-550
65.8-67.5 All IO-346, All 470, All 520 & All 550 
EXCEPT TSIOL-550
65.8-67.5 TSIOL-550
53.3-55.0 All Models (AR)
57.5-59.2 TSIOL-550
15.8-17.5 All Models (AR)
Gears
11.7-13.3 A, C & E Series, O-200, O-300, O-470, 
IO-240, & IOF-240
11.7-13.3 A, & C Series, O-200, O-300, GO-300, 
IO-240 & IOF-240
14.2-14.6 E Series, O-470 Numerical, O-470-A & E
20.0-21.7 E Series, IO-360, L/TSIO-360, IO-346, 
O-470, IO-470, TSIO-470, GTSIO-520, 
IO-520, L/TSIO-520, IO-550, IOF-550,
TSIO-550, TSIOF-550, & TSIOL-550
20.0-21.7 E Series, IO-360, L/TSIO-360, IO-346
Torque Specifications
B-7