NMRV Worm Gearbox Operation & Maintenance – Daily Checks & Troubleshooting

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NMRV Worm Gearbox – For Operators & Maintenance

Daily Checklist:

Listen – unusual noise = early warning of wear

• Feel – housing temperature should not exceed 90°C

• Look – check for oil leaks at seals

• Check – oil level (weekly)

Oil Change Schedule

First change: After 150-400 hours of operation

Regular: Every 4,000 hours or annually

Common Issues:

Overheating	Low oil / Overload	Check level, reduce load
Excessive noise	Worn worm/wheel	Inspect and replace
Oil leakage	Worn seal	Replace seal
No self-locking	Wrong ratio	Higher ratio needed

⚠️ Never mix different brands of oil – additives can react and damage gears