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.
Frequently Asked Questions
How do I confirm this fits?
Match the part number or OEM reference on your existing part with the details above. If you are unsure, send us your vehicle or engine model and year and we will confirm before you order.
Is this a genuine OEM part?
It is a new aftermarket part built to the original specification. OEM numbers are listed for cross-reference only.
Is it new or reconditioned?
It is brand new – no core charge and no old unit to return.
What if it does not fit?
Contact us with your vehicle details and the part number from your original unit and we will help you sort it out.
Note: Please verify your original part number against the references above before purchasing. Distributed by 4Drive / Aftermarket.
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