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Disconnect the radar 24VDC power supply in the junction box.
Remove the cables at the radar itself; twist each connector anti-clockwise, in turn.
Remove the bolts holding the radar to the radar bracket.
Carefully lift the radar clear of the bracket.
Protect the ends of the power and data cables to prevent water getting inside them whilst disconnected from the radar.
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Direct Drive Assembly:
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| Info |
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Caution: this This kit contains high powered magnets in the Rotor Assembly. Please refer to the Health & Safety sheet regarding magnet safety -https://www.magnetexpert.com/health-and-safety-i934 |
Required
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Sub-
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Assemblies and
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Parts
1x 1 x SUB0299 Dual 55 Assembly
1x 1 x SUB0269 Motor board Assembly
1x 1 x SUB0268 Rotor Assembly
1x 1 x BOA0099 DD Retro-Fit Board
1x 1 x WIR0094 Motor Cable
4x 4 x SCR0094VSB M4x10 Skt Csk Screw with threadlock
3x 3 x SCR0067VSB M4x12 Skt Cap Screw with threadlock
5x 5 x SCR0063VSB M6x12 Skt Cap Screw with threadlock
2x 2 x SCR0162VSB M6x16 Skt Cap Screw with threadlock
Test radar base assembly with rotating assy Rotating Assembly (in-house testing only)
Tools
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Carefully unclip and disconnect the multi coloured motor ribbon cable (A) from its edge connector on the main board. Note how the cable is routed so that the new motor cable can be routed in the same fashion on reassembly.
Using a 5mm hex key (do not use a ball-ended driver) and a 10mm spanner to hold the pillars from loosening, undo and remove the five bolts that secure the motor assembly. These bolts can be discarded.
Carefully lift the complete drive assembly up slightly from the chassis to provide access to the encoder connection.
Carefully un-clip and disconnect the encoder cable (B) from its edge connector on the main board. Ensure to grip on the latching pin at the top before pulling gently in a vertical motion.
You can now remove the old drive assembly from the chassis and return it to Navtech Radar (using the packaging supplied with the replacement unit).
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Connect the other end of the Motor Cable to J4 on the Motor Board (SUB0299).
With the radar connections facing towards you, set the Motor Board into position on the 4 pillars of the Drive Assembly with the Motor Cable tucked inside the Casting and with the board speed dip switches set in the 9 o’clock position as shown below.
Secure with 4 x M4x10mm Skt Ctsk Screws (SCR0094VSB). Take care when tightening these 4 screws; they need to be nipped up but not overtightened using a 2.5mm hex bit, Torque=60±5cNm.
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