12V Solenoid for Delco 40MT 50MT Insulated Base 6640-172 1115556 SDR6007
12V Solenoid for Delco 40MT 50MT Insulated Base 6640-172 1115556 SDR6007
SKU:245-12107
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Solenoid for Delco 40MT 50MT | 6640-172
Premium 12V Insulated Base Replacement
This high-performance starter solenoid is engineered specifically for Delco 40MT and 50MT series heavy-duty starters. Designed with a 4-terminal configuration and an insulated base, it provides reliable electrical switching for demanding industrial, agricultural, and commercial vehicle applications. Available from 4Drive / Aftermarket via 4drive.co.uk.
Key Features
- ✔ Direct fit for 40MT/50MT Starters
- ✔ 4-Terminal Insulated Base Design
- ✔ Durable Square Face Housing
- ✔ Premium silver-plated contacts
Technical Specs
| Voltage | 12V |
| Terminals | 4-Terminal |
| Base Type | Insulated |
| Battery Term. | 1/2-13 x 2-1/4 |
| Motor Term. | 1/2-13 x 1-3/4 |
| Switch/Grd. Term. | 10-32 Studs |
Compatibility / Fitment Guide
| Application | Starter Series | Notes |
|---|---|---|
| Caterpillar / CAT | 40MT, 50MT | Heavy Duty Earthmoving |
| Cummins / Mack | 40MT, 50MT | Commercial Trucking |
| Case / Massey Ferguson | 40MT, 50MT | Agriculture/Tractors |
OEM Cross Reference
| Delco | 1115556, 1115606, 1119879, 1969198 |
| Caterpillar | 2N1973, 3T5045, 7L6586, 9X8236 |
| Cummins | 3603870RX, 3604230RX |
| Arrowhead / J&N | SDR6007, 245-12107, 245-12070 |
| Ford / Mack | E1HZ-11390-A, SW1720, 2132-1115556 |
Questions & Answers
Is this suitable for a 24V system?
No, this specific part (6640-172) is designed for 12 Volt systems only. Please verify your system voltage before installation.
How do I know if it is compatible?
We recommend checking the SKU/MPN and Cross Reference list provided above. If your original part number matches any of these, it is a guaranteed fit.
What does "Insulated Base" mean for this part?
An insulated base means the solenoid body is not grounded to the starter motor. Instead, it features a dedicated ground terminal (10-32 post), making it ideal for marine or heavy industrial applications requiring isolated grounding.
Note: Please verify your original part number against the references above before purchasing. Distributed by 4Drive / Aftermarket.
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