D29 D31 Railway Traction Motor 8290124 Carbon Brush Holder

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Carbon Brush Holders

D29 D31 Railway Traction Motor 8290124 Carbon Brush Holder

Part No. 8290124

EMD D29/D31 railway traction-motor carbon brush holder, OEM part 8290124 (also listed as E8290124), a replacement brush-holder assembly for diesel-electric locomotive DC traction motors. Holds the EMD 40025029 (DE7000) triplex brush; cross-referenced with assembly 8453470 and holder family E8174433/E8417729.

Material	Brass / copper-alloy holder body with insulated mounting, per EMD traction-motor brush-holder design
Dimensions	- To be confirmed with supplier (per EMD drawing 8290124). - Holds EMD 40025029 carbon brush — DE700
Application	EMD D29/D31 DC traction motor brush holder, for diesel-electric locomotive traction-motor brush gear service.
Connection	Stud / terminal connection per EMD design (to be confirmed with supplier); brush shunt leads terminate at the holder ter

Compatible Models

EMD D29 DC traction motor EMD D31 DC traction motor Diesel-electric locomotives equipped with EMD D29/D31 traction motors (verify per locomotive class) Cross-reference assembly part: EMD 8453470 — brush holder assembly for D29 traction motor (Supco SUP-121-020) Related EMD holder family: E8174433 E8417729 (per VOCarbon holder listing E8417729 noted for D31 traction motors) Brush cross-reference: EMD 40025029 — carbon brush for D29 traction motor (DE7000

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Technical Specifications

Specification	Value
Part Number	8290124 (also listed as E8290124)
Type	Carbon brush holder (box-type, EMD design)
Material	Brass / copper alloy body; insulated mounting (exact spec TBC)
Application	EMD D29 / D31 DC traction motors (diesel-electric locomotive traction)
Brush Held	EMD 40025029 (DE7000 electrographite, triplex 3 x (5.2 x 50.6 x 56) mm) — verify fit
Dimensions	To be confirmed with supplier (per EMD drawing 8290124)
Stud / Mounting	To be confirmed with supplier
Spring	Supplied as part of assembly (EMD spring-cell design; rating TBC)
Voltage	N/A (brush holder)
Current Density	N/A (brush holder)
Speed	N/A (brush holder)
Hardness	N/A (brush holder)
Grade	N/A (holder hardware; brush grade DE7000)
Connection	Stud / terminal per EMD design (TBC)
Lead Type	N/A (brush carries the shunt lead)
Cross-Reference Assembly	EMD 8453470 (Supco SUP-121-020) — verify interchangeability
Related Holders	E8174433, E8417729 (per VOCarbon listing; E8417729 for D31)

Compatible Models

This D29 D31 Railway Traction Motor 8290124 Carbon Brush Holder is designed as a direct replacement for the following machine models and series:

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Description

This carbon brush holder, OEM part 8290124, is a replacement brush-holder assembly for EMD D29 and D31 DC traction motors used on diesel-electric locomotives. It locates and pressures the traction-motor carbon brushes against the commutator, maintaining stable brush contact under high-current traction service. The holder is built to the EMD box-type design in brass/copper alloy with insulated mounting; the spring mechanism is supplied as part of the assembly (EMD-style spring-cell design). It is intended to hold the EMD 40025029 carbon brush — DE7000 electrographite, triplex 3 × (5.2 × 50.6 × 56) mm — with the brush-box opening matched to the drawing. The same motor family is covered by cross-reference assembly 8453470 (Supco SUP-121-020) and related EMD holders E8174433 and E8417729 (the latter noted for D31 traction motors). Exact dimensions, stud/mounting details and spring rating should be confirmed against the original EMD drawing before ordering.

Features & benefits:

Direct replacement for EMD D29/D31 traction-motor brush holder service
EMD box-type design in brass/copper alloy, insulated mounting
Matched to EMD 40025029 brush (DE7000 electrographite, triplex 3 × 5.2 × 50.6 × 56 mm) — verify box opening
Spring supplied as part of assembly (EMD spring-cell design)
Family cross-references: 8453470 (SUP-121-020), E8174433, E8417729
Quality-inspected before dispatch: body, insulation, spring action and terminal integrity per batch