Below Rotation Valve Driver (BRVD), Above Rotation Valve Driver (ARVD), and CAN bridge circuit boards on...
Altec technical service bulletin SIL 771 for 2020 Altec Digger Derrick.
- Bulletin number
- SIL 771
- Component
- Equipment adaptive/mobility
- Summary
- Below Rotation Valve Driver (BRVD), Above Rotation Valve Driver (ARVD), and CAN bridge circuit boards on Altec derricks require the use of a clear potting compound so diagnostic light emitting diodes (LEDs) on the boards are visible for troubleshooting. Altec has discovered that a black potting compound was used on some of these circuit boards on the affected units, which prevents the LEDs from being visible. Altec requires that each unit be inspected for visibility of the diagnostic LEDs no later than the next periodic maintenance interval. Use the Inspection Procedure beginning on page 2. If circuit board replacement(s) are required, use the Replacement Procedure beginning on page 6.
Vehicles covered
- Altec Digger Derrick 2020 2020
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