2. Resident Engineering Staff
OEM Verification –
3 Seat SolidWorks CAD System
Product Development
Enhanced Products
Failure Analysis

3. Traction Motor Components
Bearing Cap
Bearing Hsg
Insert
New Frames
Bearing
Plate Retainer
Cover
New Frames

4. Traction Motor Components
MECHANICAL PARTS
COVERS, HSG, BRG CAPS, SEALS & COVERS
EMD - TRACTION MOTOR
Axle Caps
Bearing Caps
Bearing Housings
Caps
Collars
Flingers
Frame Heads
Housings
Seals
Sleeves
Spacers
Shims
Laminations
Armature Shafts

5. GE Traction Motors GE – Models Domestic
5GE747, 5GE751, 5GE752, 5GE763, 5GE764
GE Traction on Alco’s
731 & 761-PA
GE – AC Models
GEB7, GEB13, GEB15
All of the above models are similar in appearance and are the same general size. The construction of internal parts limits interchangeability.
Currently developing
5GE752AH
Equipped with U-Tube.

6. EMD Traction Motors, Domestic & International
Typically found in
South America
Europe
Asia
Africa
Narrow Gauge D43-BTR
Typically found in
Canada
United States
of America
The D87BTR has an overall length of in. 
The D43 has an overall length of in. 
The D43 is in. shorter that the D87BTR. 
Therefore a D43 is nearly a foot shorter than a D87BTR
Standard Gauge D87-BTR

7. Axle Bearing Housings vs. Brass
EMD – Housing Axle Bearing, AKA – U Tube
Hundreds are currently in service to date.
D77/D87 Motors to D77BTR/D87BTR Roller Support Type
Replaces the conventional Lined Bronze Support Bearing to the new Roller Support arrangement.
EMD – U TUBES
D77BTR & D87BTR
D87
AC 2630
D90
D90
AC 3424
Improved Design
Heavier Wall Thickness at C.E
Sensor Holes drilled (ready for Sensor Installation)

8. “D99” Unique Design

9. Old vs. New Newer Generation Axle Mounting Style
Older Generation Axle Mounting Style
Newer Generation Axle Mounting Style
Roller Support Type:
Replaces the conventional Lined Bronze Support Bearing to the new Roller Support arrangement.
Old vs. New
Housing Axle Bearing
1 Piece Design
RTC “D99” unique design uses D90/D100 electrical rotating motor with D87BTR Housing
Axle Cap CE
Axle Cap PE
There Exist two types of
Axle Caps The standard one
and a high oil capacity.
Improved
& Sturdier
Enhanced Design
Support Bearing

11. D87BTR Stator Frame - Fabricated
Pinion End Section
P.E
Magnetic Section
Mag Sec
Commutator End
C.E

12. Pinion end Steel parts, D87BTR
Armature
Brg Cap
Slinger
Seal Outer
Brg Cover
Brg Housing

13. D87BTR Pinion End Assembly

14. Commutator Assembly, D87BTR

15. D87BTR Bull Gear and Gearcase

16. “D99” uses D87 BTR Mechanical Parts – Enhanced Design

17. D99 Utilizes D90/100 Electrical Rotating Components
D87BTR Shell
D90/100 Commutator
Commutator is composed of;
Hub
Mica Cylinder, Segments
Mica V Ring
Spider
Cooper Segments
Counter weight
Insulation
Misc Hardware
Insulating Cement
Armature Shaft
Armature
Assembly
D90/100
Armature Laminations, Typically 480 per stack with Two End Plates

18. Completed D99 COMBO