# Backup (Forge) Air Compressor

<p class="callout warning">**This air compressor has been modified** - a brass tee was installed between the tank and the check valve to allow it to act as a buffer tank for the forge's power hammer. </p>

- Model: Central Pneumatic 61489, 2HP
- Capacity: 29 gal
- Pump oil: 11.4oz of SAE 40 is required
- Factory set points: on at 120PSI, off at 150PSI
- Manual: [central\_pneumatic\_61489.pdf](https://wiki.protohaven.org/attachments/594)