Differentiating Between Alternator Mounting Configurations | Delco Remy Tech Tip

There are many different alternator mounting positions and belt configurations on heavy duty diesel engines today. With innovations in brushless technology, higher output alternators and upgraded electrical components, companies now manufacture alternators in various sizes.
When replacing or upgrading your alternator, you’ll need to differentiate between the different sizes and mounting configurations to ensure the smoothest installation.
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To replace an alternator with a different pad length or mounting hole center line, follow these steps:
Step 1: Identify the mounting hole locations
Step 2: Determine which holes to use
Step 3: Compare alternator sizes
If the current alternator you’re replacing specifically calls for one mount type or the other, and the Delco Remy alternator you’re replacing it with is a longer or shorter hinge mount, please call technical assistance at 1-800-372-0222 to obtain the correct part number for the mounting you require.
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Delco Remy starters and alternators from BorgWarner are the preferred choice for medium and heavy-duty truck, bus and off-highway applications worldwide. Learn more at delcoremy.com.
Delco Remy is a registered trademark of General Motors Corporation, licensed to BorgWarner PDS (Anderson) L.L.C.
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Safety Reminder
The various electrical systems within a vehicle are highly charged and may include corrosive, poisonous, and hazardous materials. To remain safe, you must:
- Know where the nearest eye wash station is located
- Always wear eye protection
- Remove any metallic items that could create an electrical charge including watches and jewelry
- Never smoke near batteries
- Never use batteries as a tool rest
- Dispose of batteries properly when necessary
- Follow usual safety precautions near rotating machinery