This chart outlines the recommended maintenance intervals for the Achilles Drive Unit`s components to ensure optimal performance and longevity. These intervals are suggestions and should be adjusted based on operational conditions, usage intensity, and specific site requirements. 

# 

Description 

Per Dive 

Weekly 

Monthly 

Quarterly 

Annually 

Pre operation 

Post Operation 

As needed 

1.     

Clean Drive Unit 

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  1.  

Inspect the drive unit for visible damage, including dents, scratches, or loose components 

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  1.  

Verify that all electrical connector and cable are properly attached and undamaged. 

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  1.  

Refill the output shaft lubricant thru the grease nipple acc. to section 3.2  

Note: If water contamination is found in the exiting grease the Drive Unit must be replaced before diving! 

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  1.  

Check that the sprocket on the output shaft is secured by the split pin. 

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  1.  

Remove the Housing Cap to check the Motor & Brake compartment. 

 

 

 

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6.1. 

Check the internal cables for damages. 

 

 

 

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6.2. 

Look for trace of water ingress and corrosion in the compartment. 

 

 

 

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6.3. 

Check O-rings for damage and lubricate them. Replace if necessary. 

 

 

 

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6.4. 

Check the free rotation of the motor shaft. 

 

 

 

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  1.  

Remove the gear & bearing assembly to check the internal parts 

 

 

 

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7.1. 

Check free and smooth rotation of the output shaft. Replace bearings if necessary. 

 

 

 

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7.2. 

Look for trace of water ingress and corrosion. 

 

 

 

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7.3. 

Check the wave generator for damage. 

 

 

 

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7.4. 

Clean and regrease the strain wave gear components acc. to Harmonic Drive Instructions: 
Assembly Instructions Gear Component Sets by Harmonic Drives 

 

 

 

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7.5. 

Check O-rings for damage and lubricate them with Molykote 55. Replace if necessary. 

 

 

 

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7.6. 

Test the water ingress sensor 

 

 

 

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  1.  

Check the connector for damage. 

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  1.  

If connector disconnected relubricate 

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  1.  

Remove the output shaft seal. Check the output shaft for extensive wear around the sealing surface. 

 

 

 

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  1.  

Replace the output shaft seal. 

 

 

 

 

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  1.  

Perform IAT procedure. 

 

 

 

 

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