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PV, 120 (Amazon), 1800 General Forum for the Volvo PV, 120 and 1800 cars |
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'68 1800 bonnet release mechanismViews : 1022 Replies : 4Users Viewing This Thread : |
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Mar 5th, 2006, 19:31 | #1 |
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Last Online: Apr 1st, 2014 23:55
Join Date: Nov 2004
Location: Stockport
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'68 1800 bonnet release mechanism
Hi, I am rebuilding a '68 1800S that someone took apart years ago and never got round to putting back together. I am currently struggling with the bonnet mechanism. When lowering the bonnet, the retaining bar catches only just connect with the lugs on the bonnet. The shortest of the two prongs on the catch is at the top which seems odd, but the bar is in the body the correct way round.
When operating the lever, instead of pulling the bonnet tight, the bar flexes and pulls down while the catches hardly move at all. Consequently the bonnet does not shut. I had recently taken the lever apart to clean off all the old paint and crap that was on it (nice chrome underneath) and I think I have put it back together correctly, but I have my doubts. Should the bar move the catch backwards (ie towards the boot) or forwards (to the radiator) to close the bonnet? Does anyone have any suggestions as to what might be wrong or have any photos of a mechanism that does work that I can compare with my own defective unit? |
Mar 5th, 2006, 22:42 | #2 |
VOC Member
Last Online: Dec 3rd, 2021 08:39
Join Date: Jan 1970
Location: Sutton, near Ely
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I don't actually know which way it rotates, but I would guess that it must be down and towards the front. I don't believe that there would be enough give for anything else to happen. See attached picture for a shot of mine soon after I got the car.
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Mar 6th, 2006, 08:05 | #3 |
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Last Online: Yesterday 15:14
Join Date: Dec 2003
Location: Peterborough
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The bar simply pulls the prongs down and the shorter - top - ones pull down over the bonnet brackets to close it. Are you sure the brackets are in the right place? They are adjustable with captive nuts and shims. If they aren't in the right place and at the right height the catches will not close over them and simply pull against them, flexing both bonnet and bar. That is your problem I'm sure. Loosen the screws holding the brackets to move them slightly and try them in different postions. Don't forget your bonnet rubber either, or the two bungs on the bulkhead that stop the bonnet going down too far.
Mike |
Mar 7th, 2006, 23:06 | #4 |
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Last Online: Apr 1st, 2014 23:55
Join Date: Nov 2004
Location: Stockport
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Mike / Andrew,
Many thanks. I'll try the adjustment on the retaining bar this week. The other problem is that the handle inside the cab flexes the steelwork it is bolted to when trying to lock the bonnet down. The spring on the level provides a huge amount of tension. Is this normal, or have I reassembled it the wrong way? |
Mar 8th, 2006, 07:53 | #5 |
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Last Online: Yesterday 15:14
Join Date: Dec 2003
Location: Peterborough
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I mean the brackets on the BONNET not on the bar. Loosen the screws to give them some movement (but be carefull of the shims falling out) and close the bonnet to allow them to be pulled into correct alignment. It is because they are not in the right place you are getting the flexing - something has to give if your pulling on several bits of metal that don't fit right.
Mike |
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