Teledyne Continental Motors, Inc.
TM
Engine
Description
IOF-550 Permold Series Engine Maintenance Manual
2-37
1 April 2007
2-3.4. Accessory Drive Ratios
The accessory drive ratios are the same for all of the IOF-550 Permold series engines.
Refer to the chart below.
Table 2-4.
Accessory Drive Ratios, Rotation, Speed, Torque & Moments
Accessory
Direction
of
Rotation
Drive Ratio to
Crankshaft
Maximum Torque,
in·lb
Cont. Static
Maximum
Overhang
Moment,
in·lbs
Optional Tachometer
CCW
0.5:1
7
50
25
Starter
Motor
CCW
48:1
200 400 60
Propeller Governor
CW 1:1 29
825
50
Fuel Pump
CCW
1:1
25
680
60
Alternator
CCW
3:1
150 800 150
Optional Accessory Drive
CCW
3:1
100
500
N/A
AND20000 Pads
CW
1.5:1
100 800 40
CW = Clockwise Rotation CCW = Counterclockwise Rotation. View is facing drive.
One drive is eligible at 160 in lb continuous torque load providing the other does not
exceed 100 in lb continuous torque load. Drive pads are per AND 20000, optionally, per
MS3325 modified, and shall be provided with covers.
This drive is a modified AND 20010 and shall be supplied with a cover.
2-3.4.1. Accessory Drive Pad
The accessory drive pad is an AND20000 specification that has been modified for speed,
torque, and moment. The drive pad is provided with a cover in the event that its use is
not required.
2-3.5. Oil Specifications
WARNING
Do not use any other oils in the engine other than those
specified.
The commercially available ashless dispersant aviation oils listed in “Recommended
Ashless Dispersant Aviation Engine Oils” conform to TCM’s oil specifications. A list of
qualified lubricants is provided with the Engine Oil Servicing instructions in Chapter 5.
Do not use any other commercial quality oil.
Table 2-5.
Engine Oil Type Requirements
Recommended Grade of Ashless Dispersant Engine
Oil
Oil Type
Above 40
°
F (4
°
C), Ambient Air (Sea Level)
SAE 50 or Multi Viscosity
Below 40
°
F (4
°
C), Ambient Air (Sea Level)
SAE 30 or Multi Viscosity