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24th February 2023, 08:53 | #11 |
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Thanks for the heads-up, unfortunately for me, I read it a bit too late. I discovered the spring loaded mechanism the hard way! I think I found all the pieces.
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Matt 2001 Rover 75 Connoisseur SE 2.5 (BRG) 1999 Rover 75 Club 2.5 (Dorchester Red) 1973 Triumph Dolomite (Honeysuckle) |
24th February 2023, 09:05 | #12 |
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25th February 2023, 15:52 | #13 |
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Here's the stripped down and cleaned mechanism:
I hope this is everything after the disassembly explosion! There are six screws missing from this picture that are in a separate tray. It'll get a final check over and before being reassembled. Looking down on the gear mechanism, it rotates anti-clockwise when raising the blind, so it's important that the spring is correctly tensioned to assist this.
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Matt 2001 Rover 75 Connoisseur SE 2.5 (BRG) 1999 Rover 75 Club 2.5 (Dorchester Red) 1973 Triumph Dolomite (Honeysuckle) Last edited by Matt_75; 25th February 2023 at 15:54.. |
25th February 2023, 20:17 | #14 |
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25th February 2023, 20:19 | #15 | |
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25th February 2023, 21:20 | #16 |
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I decided to do a dry reassembly run before greasing it all up. Here is how I put it back together.
1. Attach the spring to the large diameter wheel, ensuring the outer tang locates properly in the groove as shown at the top of this photo. 2. The inner tang now needs to locate in this slot near the brass bushing in the main body. This is a bit fiddly and I used a pick tool to help locate it. 3. Insert the torx screw that acts as a stop for the mechanism to prevent over-rotation. In hindsight, this could be done first. 4. Locate the shaft of the smaller diameter wheel in the corresponding blind hole. 5. Put the brown coloured smaller diameter wheel onto the shaft ensuring it meshes with the large diameter wheel properly. 6. Now it's time to tension the spring, which is a bit tricky. Rotate the brown wheel anti-clockwise, which in turn will rotate the large wheel clockwise, until it hits the stop screw. Holding it in place, insert the motor and mesh the worm gear to keep everything still. Make sure the worm gear stays meshed as the brown wheel has a tendency to want to lean away from it which could cause it to disengage and unwind the spring. 7. Insert the screws into the motor ensuring the spring/gear assembly doesn't move. 8. Put the top plate on. I used a thin trim tool to push the shaft of the brown wheel to get it to locate properly in the brass bushing of the top plate. Insert the top plate screws. That's it. I did a quick bench test with a 12v battery and it seemed to work properly. I've now disassembled it ready for final assembly with grease.
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Matt 2001 Rover 75 Connoisseur SE 2.5 (BRG) 1999 Rover 75 Club 2.5 (Dorchester Red) 1973 Triumph Dolomite (Honeysuckle) |
25th February 2023, 23:59 | #17 | ||
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Big thank you from & lots of other members i would think, nice clear neat how to. What grease are you going to use, normal clear grey grease, or the gold grease.
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26th February 2023, 06:44 | #18 | |
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I'd appreciate a bit of advice on the grease actually. I don't know what the original yellow coloured grease was. Does anyone on here know? I've seen posts from another member saying he used multipurpose lithium grease so I was planning to do the same.
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Matt 2001 Rover 75 Connoisseur SE 2.5 (BRG) 1999 Rover 75 Club 2.5 (Dorchester Red) 1973 Triumph Dolomite (Honeysuckle) Last edited by Matt_75; 26th February 2023 at 06:59.. |
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26th February 2023, 07:41 | #19 | |
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26th February 2023, 07:43 | #20 |
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There's something else I want to test too. I've been thinking about why the stop screw is a separate piece and why it wasn't integrated into the housing.
When I tensioned the spring, I rotated the large wheel through about 90 degrees before it hit the stop. I'm wondering if this should be done without the stop screw in situ and whether the spring should be tensioned through 450 degrees of rotation (360, insert stop screw, then 90). When the assembly "exploded" it seemed to be under a lot of tension but it's hard to say as I didn't get a good look. When I did the dry assembly, there didn't seem to be as much.
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