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Document ID 19-048 Rev 2 | Copyright © 2021 Nabors Drilling Technologies USA, Inc. All rights reserved.
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Model: See affected models
Serial #: N/A
Sep. 29, 2021
Product Bulletin # TDS-199 Rev 2
Handler Lock Sensor Improvement
Canrig has discontinued the use of the current handler lock sensor assembly (AY10484-X) which is
used on 1250AC and 1275AC top drives. The handler lock sensor has been replaced with a new
handler lock sensor with a simplified design and improved securement.
Affected Models
Top drive models: 1250AC-681, 1275AC-681, 1250AC-865, 1275AC-865.
Replacement Information
Contact RIGLINE 24/7™ to order the new handler lock sensor assembly. Install the new sensor on
the handler lock assembly following the procedure described below.
Table 1: Handler Lock Sensor Assembly Options
Old Handler
Lock Sensor
New Handler
Lock Sensor
Handler Lock Sensor Description
Sensor
P/N
Bracket
P/N
AY10484
AY24336
Handler Lock Sensor Assy, CENELEC
N11521
DT34906
AY10484-1
AY24336-1
Handler Lock Sensor Assy, NEC/CSA
N11522
