MODELS 646238 646275

CONTINENTAL® ENGINE ACCESSORIES

STARTER SERVICE SUPPORT MANUAL

Publication X30592-1 ©

2011 CONTINENTAL MOTORS, INC.

AUG 2011

Supersedure Notice This manual revision replaces the front cover and list of effective pages for Publication Part No. X30592, dated February 1987. Previous editions are obsolete upon release of this manual.

Effective Changes for this Manual 0 ..............February 1987 1 ............ 31 August 2011

List of Effective Pages Document Title: Starter Service Support Manual Publication Number: X30592-1 Page

Change

Page

Change

Initial Publication Date: February 1987 Page

Change

Page

Change

Cover............................ 1 A................................... 1 i .................................... 0 ii - blank added............. 1 1 thru 10 ...................... 0

Published and printed in the U.S.A. by Continental Motors, Inc. Available exclusively from the publisher: P.O. Box 90, Mobile, AL 36601 Copyright © 2011 Continental Motors, Inc. All rights reserved. This material may not be reprinted, republished, broadcast, or otherwise altered without the publisher's written permission. This manual is provided without express, statutory, or implied warranties. The publisher will not be held liable for any damages caused by or alleged to be caused by use, misuse, abuse, or misinterpretation of the contents. Content is subject to change without notice. Other products and companies mentioned herein may be trademarks of the respective owners.

A

Starter Service Support Manual 31 August 2011

TABLE OF CONTENTS

INTRODUCTION.

DESCRIPTION.

2

TESTING . . .

2

Test Specifications

DISASSEMBLY. . . .

2

End Housings.

3

Rotor Shaft Assembly (Armature) .

3

Brush Holder Assembly

3

3

INSPECTION AND REPAIR Brushes

3

Oil Seal

4

Rotor Shaft Assembly (Armature) .

4

"

Field Coils

4

Bearings

5

REASSEMBLY.

6

Brush Holder Assembly

6

Rotor Shaft Assembly (Armature)

6

End Housings. . . . . . . . . .

6

PARTS LIST ENERGIZER ® 12 VOLT (646238).

8

PARTS LIST ENERGIZER®12 VOLT (646238-1).

9

PARTS LIST ENERGIZER ® 24 VOLT (646275). . . . . . . . . . . . . . . . . . . . . . . . . . . .

-1-

10

Intentionally Left Blank

SERVICE INSTRUCTIONS INTRODUCTION

The ·following service procedures covered herein apply to the 646238 -- 12 volt, 646238-1 12 volt and 646275 -- 24 volt gear driven starters. The Energizer ® starter is designed as a field non-serviceable accessory. Therefore, TCM recommends replacement with a new exchange starter which should result in the most economic means of repair. However, TCM offers the following test procedures and service components for service repair.

CAUTION . .. The following precautions must be observed when servicing the starter system or serious damage may be incurred by the starter or the Aircraft Electrical System. 1. Make absolutely certain that the aircraft battery is installed with the negative terminal grounded.

2. When connecting a charger or booster battery to the aircraft battery, connect positive to positive and negative to negative. 3. Disconnect the aircraft battery before removing or servicing the starter system. 4. Insure starter terminal is not grounded prior to connecting lead to starter terminal.

DESCRIPTION The starter consists of five main subassemblies: 1. Drive end flange containing replaceable bearing and oil seal. 2. Rotor shaft assembly (Armature). 3. Brush holder assembly containing two replaceable brushes. 4. Commutator-end cover assembly containing replaceable bearing. 5. Starter housing assembly containing a field coil, with two replaceable brushes. The drive-end flange assembly provides the mounting flange for attachment of the starter to the engine and supports the bearing through which the rotor shaft protrudes to support the starter drive. The rotor shaft assembly (armature) carries the rotating field coil enclosed within the rotor with connecting wires terminated at the commutator. The commutator in conjunction with the brushes, located in the commutator end of the starter housing, provides a rotating connection through which the rotor assembly may be energized. The brush holder assembly is a one-piece device which provides placement and spring loading of the brushes. The commutator-end cover assembly contains a bearing in which the rear end of the rotor shaft is supported.

1

The starter housing assembly supports the non-replaceable field winding pole shoes and brush holder assembly.

TEST SPECIFICATIONS (75°F) Energizer®12 volt: No load test 5.7 volts*, 53-91 AMPS 3650 RPM minimum. Energ;zer®24 volt: No load test 20 volts*, 30-50 AMPS 4300 RPM minimum.

4

2

3

1

STARTER

+

==o.c. SUPPLY

FIGURE 1. TEST CONNECTION DIAGRAM_

1. Rheostat (0.05 to 0.2 ohms range. 95 amp capability) 2. D.C. Ammeter (0 to 100 amps)

3. Switch (100 amp rating) 4. D.C. Voltmeter (0 to 30 volts)

TESTING 1.

Install starter on test fixture. 2. Adjust rheostat to obtain the specified voltage. 3. Read current and shaft speed. 4. If starter meets test requirements, operates without excessive noise and shaft turns with less than 5 in-Ibs. of torque, the starter should function satisfactorily on the engine.

DISASSEMBLY Only limited replacement items are available for servicing the starter. If items other than brushes, bearings or oil seal require replacement, a new starter will be required.

2

A.

B.

End Housings 1.

Remove the four (4) through bolts.

2.

Remove the two end housings.

Rotor Shaft Assembly (Armature) 1.

c.

Making note as to the number of spacers mounted on each end of the rotor shaft, remove the rotor shaft assembly from the starter housing.

Brush Holder Assembly 1.

Remove the three (3) brush holder retaining screws.

2.

Disassemble the two (2) field coil brushes from brush holder and remove the brush. holder assembly.

INSPECTION AND REPAIR A.

Brushes 1.

If brushes are less than .39 or 25/64 of an inch long they should be replaced.

2.

On. the brush holder assembly, heat the brush lead connector and pry crimp from the wire.

CUT OLD BRUSH OFF HERE CLEAN TERMINAL AND SILVER SOLDER NEW BRUSH HERE

STARTER HOUSING

FIGURE 2.

3

B.

3.

Place insulation on new brush lead, install lead and crimp into place. Silver solder brush lead at the open end of crimp.

4.

On the field coil assembly, cut the brushes as close as possible to the field terminal. Clean the side of the terminal post for silver soldering of new brushes.

5.

Place insulation on new brush lead, holding brush lead to field terminal, silver solder. Do not allow solder to wick up the flexible brush lead during the soldering process. If silver solder makes the lead rigid it must be replaced with a new lead (see Figure 2).

011 Seal 1.

c.

If oil seal shows signs of leakage or wear it should be replaced, TCM recommends 100% replacement of oil seal.

Rotor Shaft Assembly (Armature) 1.

Inspect the commutator for cleanliness, excessive wear or pitting. If required, the commutator can be reworked to the following specifications: Minimum Diameter Undercut Total Runout from Bearing Surfaces Surface Finish

D.

4

1.50" .003" Max. .002" Max. 50 Microinch Max.

2.

Inspect bearing surfaces for galling or excessive wear. No replacement parts are available and a new starter will be required.

3.

Inspect rotor for wear, broken wires or cracked insulation.

4.

Check armature for short circuits, opens, and grounds.

5.

SHORT CIRCUITS. Short circuits are located by rotating the armature in a growler with a steel strip such as a hacksaw blade held on the armature. The steel strip will vibrate on the area of the short circuit. Shorts between bars are sometimes produced by brush dust or copper between the bars. Undercutting the insulation will eliminate these shorts.

6.

OPENS. Inspect the points where the conductors are joined to the commutator for loose connections. Poor connections cause arCing and burning of the commutator. If the bars are not badly burned, leads originally soldered to the riser bars can be resoldered.

7.

GROUNDS. Grounds in the armature can be detected by the use of a test lamp and probes. If the lamp lights when one test probe is placed on the commutator and the other probe on the armature core or shaft, the armature is grounded. Armature will require replacement.

FIELD COILS. Check field coils for grounds and opens using a test lamp. 1.

GROUNDS. Disconnect field coil ground connections. Connect one test probe to the field frame and the other to the field connector. If the lamp lights the field coils are grounded and must be repaired or replaced.

2.

OPENS. Connect test lamp probes to the ends of the field coil leads. If the lamp does not light, the field coils are open.

3.

If the stationary field assembly is found to be unserviceable, a new starter will be required.

E.

Bearings 1.

Inspect bearings for excessive wear (see dimensions given in Figures 3 thru 6) and galling. If replacement is required refer to Figures 3 thru 6, and proceed as follows: a.

b.

Drive End Flange Bearing 1)

Make a suitable fixture to hold the drive end flange on the press bench. Press the bearing through the drive end flange and oil seal.

2)

Carefully bend approximately one-half (1/2) the diameter of the steel oil seal retainer down using a small, sharp chisel and mallet. Do not score drive end flange. (~ee Figure 4).

3)

USing a pair of common pliers, grasp bent portion of oil seal retainer and remove oil seal from drive end flange.'

4)

Press new bearing into drive end flange using dimensions given in Figure 3.

5)

Press a new oil seal into drive end flange assembly.

Commutator End Cover 1)

USing a blind hole bearing puller remove bearing from commutator end cover (See Figure 5).

2)

Press new bearing into commutator end cover to dimension given in Figure 6.

PRESS RAM

14---1-- .8437 DIA.

BALLPEEN~

BARSTOCK

HAMMER

.750 1.0. -;t::::t.,~ .748 ,

~

DRIVE END FLANGE ASSY. CHISEL OIL SEAL STEEL RETAINER

DRIVE END FLANGE ASSEMBLY FIXTURE

FIGURE 3. DRIVE END FLANGE ASSEMBLY BEARING REMOVAL & INSTALLATION.

FIGURE 4. DRIVE END FLANGE ASSEMBLY OIL SEAL REMOVAL

5

I

BLIND HOLE BEARING PULLER

PRESS NEW BEARING IN TO .700

8-

.593 DIA. BAR STOCK

.5625 I.D.-~.-jl .5610

BEARING

BEARING

COMMUTATOR END COVER

FIGURE 5. COMMUTATOR END COVER BEARING REMOVAL

F.

FIGURE 6. COMMUTATOR END COVER BEARING INSTALLATION.

Reassembly After all parts have been inspected, repaired or found to be in a serviceable condition, starter may be re-assembled. a.

b.

c.

, I

Brush Holder Assembly 1.

Assemble the two field coil brushes into the brush holder assembly.

2.

Place brush holder assembly into starter housing, line up holes and secure with three retaining screws.

Rotor Shaft Assembly (Armature) 1.

Insure that spacers are installed in the same manner (place) and sequence from which they were removed. TMC recommends that any time the starter is dissembled the fiber spacers be replaced 100%.

2.

Install rotor shaft assembly (armature) into starter housing.

End Housings 1.

Install the two end housings lining up the bolt holes.

2.

Install the four starter through bolts (bolts positioned in holes located on the raised portion of the commutator end cover require one lockwasher, two lockwashers are used on the remaining two through bolts) and screw in finger tight.

3.

Rotate starter shaft 360° to insure free movement and square up end housings.

4.

Torque through boits to 95·105 inch pounds. Check starter shaft torque. not exceed 5 inch pounds.

I I

I

d.

6

Test starter per test specifications given prior to installation.

Torque must

1

20

FIGURE 7.

7

PARTS LIST ENERGIZER@12 VOLT 646238

FIG. & INDEX 2- 1

PART NUMBER 646238 646326

- 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 -10 -11 -12 -13 -14 -15 -16 -17 -18 -19 -20 -21 -22 -23 -24 -25 -26

AR - As Required NS - Not Sold

8

646327 646328 MS16562-21 646502 646332 646333 24764 646349 646357 .646349 646359 646360 646361 646362 646363 646364 646367 646368 646365 646340 646348 MS35338.44

12 3 4 5

DESCRIPTION

Starter, 12 Volt · Flange Assy. - Drive End · . Flange Drive End Starter · . Bushing - .750 1.0. · . Seal - Oil .75 Shaft Dia. · . Roll Pin · Cover Assy. - Commutator End . · . Cover - Commutator End . · . Bushing - Commutator End . · Armature - 12 Volt · Plate - Identification · Screw - No. 0-.19 DRV · Housing Assy. - 12 Volt · . Screw - Self Threading · . Stud - Terminal · . Screw - Self Threading · . Washer - Insulator · . Insulator ~ Square · . Washer - Insulator · . Washer - Flat · . Washer - Lock . · . Nut - Hex .312-18 · Washer. · Washer - Fiber · Bolt - Hex Flange · Brush Holder Assembly. · Brush. · Washer, Lock

QTY. 1 1 NS

1 1 NS 1 1 NS 4 NS 3 1 1 2 1 1 2 2 1 AR 4 1 4 6

USABLE ON CODE

PARTS LIST ENERGIZER®12 VOLT 646238-1

FIG. & INDEX 2- 1 •

2 3 4 5

- 6 - 7 - 8 - 9 -10 -11 -12 -13 -14 -15 -16 -17 -18 -19 -20 -21 -22 -23 -24 -25 -26 -27 -28 -29

PART NUMBER 646238 646326

94

6327 646328 MS16562-21 646502 646332 646333 24764 646349 646357 646349 646359 646360 646361 646362 646363 646364 646367 646368 646365 646340 646348 MS35338.44 649107 649083-25-5 649108

DESCRIPTION

1 2 345

Starter, 12 Volt · Flange Assy. - Drive End · . Flange Drive End Starter · . Bushing - .750 I.D. · . Seal - Oil .75 Shaft Dia. · . Roll Pin · Cover Assy. - Commutator End. · . Cover - Commutator End . . · . Bushing - Commutator End . · Armature - 12 Volt · Plate - Identification · Screw - No. 0-.19 DRV . • Housing Assy. - 12 Volt . · . Screw - Self Threading · . Stud - Terminal . · . Screw - Self Threading · . Washer - Insulator · . Insulator - Square · . Washer - Insulator · . Washer - Rat . · . Washer - Lock . · . Nut - Hex .312-18 · Washer . . · Washer - Fiber · Bolt - Hex Flange · Brush Holder Assembly. · Brush .. · Washer, Lock . Solenoid, 12 Volt · Screw. · Connector.

·

·. ·.

..

QTY.

USABLE ON CODE

1

1 NS 1 1 1 1 NS 1 1 NS 4 NS 3 1

1 2 1 1 1 2 2 1 AR 4

1 4 6 1 2

AR - As Required NS - Not Sold

9

PARTS LIST ENERGIZER®24 VOLT 646275

FIG. & INDEX 1- 1

-

2 3 4 5

- 6 - 7 - 8 - 9 -10 -11 -12 -13 -14 -15 -16 -17 -18 -19 -20 -21 -22 -23 -24 -25 -26

AR - As Required NS - Not Sold

10

PART NUMBER 646275 646326 646327 646328 MS16562-21 646502 646332 646374 24764 646349 646357 646349 646359 646360 646361 646362 646363 646364 646367 646368 646365 646340 646348 MS35338.44

12345

DESCRIPTION

Starter, 24 Volt · Flange Assy. - Drive End · . Flange Drive End Starter · . Bushing - .750 I.D. · . Seal - Oil .75 Shaft Dia. · . Roll Pin · Cover Assy. - Commutator End . · . Cover - Commutator End . · . Bushing - Commutator End . · Armature - 24 Volt · Plate - Identification · Screw - No. 0-.19 DRV · Housing Assy. - 24 Volt · . Screw - Self Threading · Stud - Terminal . · . Screw - Self Threading · . Washer - Insulator · . Insulator - Square · . Washer - Insulator · . Washer - Flat .. · . Washer - Lock . .. · . Nut - Hex .312-18 · Washer. · Washer - Fiber .. · Bolt - Hex Flange · Brush Holder Assembly. · Brush. · Washer, Lock . . . . .

.

QTY. 1 1 NS

1 1 1 NS 1 1 NS 4 NS 3 1 1 2 1 1 1 2 2 1 AR 4 1 4 6

USABLE ON CODE

www.continentalmotors.aero