Applicable Systems
Electra Saver
Symptoms
The belt drive system has detected excessive belt slippage. The motor speed does not match the air end speed, indicating belt wear or tension loss.
Possible Causes
- Belt tension reduced due to stretching or wear over time
- Pulley misalignment causing uneven belt wear and slippage
- Oil contamination on the belt reducing friction
Troubleshooting Steps
- Step 1: Inspect the belt for cracks, glazing, or oil contamination
Replace the belt if any visible damage is found - Step 2: Check belt tension using a belt tension gauge against the manual specification
Adjust the motor mount to achieve the correct deflection value - Step 3: Verify pulley alignment using a straightedge across both pulley faces
Shim the motor or air end pulley if faces are not coplanar
How to Reset
Reset: After belt replacement and tension adjustment, reset the service alarm on the controller.
Common Replacement Parts
- Drive belt: B-section, matched set of 2 (Replace belts in pairs even if only one is worn)
- Pulley bushing: Taper-lock type, 1610 (Inspect for wear when replacing belts)
Frequently Asked Questions
- Q: How often should belts be replaced?
Every 2000-4000 hours or when visible cracking appears. Retension after the first 50 hours of new belt installation.
- Q: Why replace belts in pairs?
A new belt paired with a worn belt will run at different speeds, causing rapid wear of both.
Source: Service Manual
Category: Compressor