Standard Practices
Teledyne Continental Motors, Inc.
TM
C-16
IOF-550 Permold Series Engine Maintenance Manual
1 April 2007
C-7.4. Step-Type Rosan
®
Stud Removal
There are two methods for removing step-type Rosan
®
studs. Each of these methods is
described below. The first uses a special tool; the second provides machining instructions
to cut the stud, drill a pilot hole and remove the stud with an bolt extractor.
C-7.4.1. Step-Type Rosan
®
Stud Removal Method 1
Procedure
1.
Use the Rosan® Stud Remover (Figure C-8 and Figure C-9) to mill the lock ring to
the appropriate depth.
2.
Apply removal torque to remove the stud.
3.
Lift out the remaining portions of the lock ring.
4.
Carefully use a sharp punch to break away the remaining portion from the cylinder
head.
Figure C-8.
Rosan® Stud Removal Tool
Figure C-9.
Rosan® stud removal tool installed on stud
C-7.4.2. Step-Type Rosan
®
Stud Removal Method 2
Procedure
1.
Follow the procedure in the section entitled “Removing Size-on-Size Rosan
®
Studs.”
2.
Select the appropriate removal drill sizes with regard to the stud end dimension.
Example:
To remove a step-type stud with a 0.250-inch diameter
nut end and a 0.312- inch diameter stud end, use the appropriate
removal drill for a 0.312-inch “size-on-size” stud.