Non-Overhaul Removal and Replacement
Teledyne Continental Motors, Inc.
TM
10-10
IOF-550 Permold Series Engine Maintenance Manual
1 April 2007
10-3.3. Starter and Starter Adapter Service Limits
Starters and starter adapter service limits are in Table 10-5. Item numbers in the first
column correspond to the item numbers in Figure 10-3. Fits and limits for the worm
wheel drum dimensions (Figure 10-4) and shaft gear drum dimensions (Figure 10-5) are
shown in Table 10-6 and Table 10-7, respectively.
Table 10-5.
Starter and Starter Adapter Service Limits
Item #
Description
Service
Limit
New Part
Minimum
(inches)
New Part
Maximum
(inches)
Starter shaft gear needle bearing hole
crankcase diameter
--- 0.9990 1.0000
Starter shaft gear front (bearing) journal
diameter
0.7480 0.7495
0.7500
Starter shaft gear in clutch drum bearing
diameter
1.0000 0.9995
1.0000L
Clutch spring sleeve in starter adapter
diameter
0.0050T 0.0030T
0.0050T
Starter shaft gear in ball bearing diameter
0.0007L
0.0001T
0.0005L
Bearing in starter adapter cover diameter
0.0010L
0.0001T
0.0010L
Worm wheel gear end clearance
0.0250
0.0016
0.0166
Worm wheel drum diameter
Figure 10-4
Figure 10-4
Starter shaft gear drum diameter
Figure 10-5
Figure 10-5
*Clutch spring in clutch spring sleeve
diameter
0.030T 0.0310T 0.0380T
From center line of worm gear shaft to starter
adapter thrust pads
0.2520 0.2450
0.2490
Needle bearing hole starter adapter diameter
0.7495
0.7485
0.7495
Ball bearing in starter adapter diameter
0.0013L
0.0001T
0.0013L
Worm gear shaft in needle bearing area
diameter
0.5600 0.5615
0.5625
Worm gear shaft in ball bearing diameter
0.0007T
0.0001L
0.0007T
Starter worm gear on shaft diameter
0.0040
0.0005L
0.0025L
Starter spring on worm drive shaft diameter
0.0250L
0.0050L
0.0250L
Starter pilot to starter drive adapter diameter
0.0070L
0.0010L
0.0070L
Scavenge pump driven gear on shaft
diameter
0.0040L 0.0005L
0.0025L
Scavenge pump driver and driven gear in
body end clearance
0.0060L 0.0015
0.0040
Scavenge pump driver and driven gear in
body diameter
0.0160L 0.0118L
0.0143L
Bushing in scavenge pump driven gear
diameter
--- 0.0035T
0.0060T
Scavenge pump driver and driven gear
backlash
--- 0.0035 0.0050
Starter worm wheel gear and worm gear
backlash
0.0200 0.0090
0.0110
* When the sandblasted diameter finish is smoother than 125 RMS, replace the sleeve
T = Tight and L = Loose