tweetyduck Posted July 5, 2016 Share Posted July 5, 2016 Second Alternator Mount 300Tdi Engine. Standard Gwyn Lewis one but with a 24V alternator on it with the rear shielding can removed as it was certainly hitting the bonnet as it sticks up. Why can't i close the bloody bonnet! The Alt is the same fixings as a normal one and so therefor the same diameter as even a 12v.......Argh. Sensible suggestions please and to why this "normal" thing is now abnormal. Vehicle is a Pulse Ambulance with a Military Bonnet of course. Did they use an older bonnet or something? 1 Quote Link to comment Share on other sites More sharing options...
rich broom Posted July 5, 2016 Share Posted July 5, 2016 Puma bonnet sorts it out nicely Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted July 5, 2016 Share Posted July 5, 2016 Doesn't one of the bonnets have less bracing in it, maybe make enough difference? Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted July 5, 2016 Author Share Posted July 5, 2016 I've checked some photos of other bonnets and it looks pretty similar. I think the problem is the Alternator is a bigger diameter from looking at photos. I might be able to shorten the belt and "cant" the alt back but i'm still trying to figure it out. Quote Link to comment Share on other sites More sharing options...
Lewis Posted July 5, 2016 Share Posted July 5, 2016 I'm struggling to understand how it can hit the bonnet. My airbox is bolted on an angled bracket to the same mounting points as your alternator, and it clears the bonnet just fine, and surely must be a bigger diameter than the 24v alt? Perhaps my engine being further back makes all the difference Quote Link to comment Share on other sites More sharing options...
GW8IZR Posted July 5, 2016 Share Posted July 5, 2016 I'm struggling to understand how it can hit the bonnet. My airbox is bolted on an angled bracket to the same mounting points as your alternator, and it clears the bonnet just fine, and surely must be a bigger diameter than the 24v alt? Perhaps my engine being further back makes all the difference I dont think it can be that, whilst my engine is in the same position as yours I come over the top of the intake hose with my air duct and thats gotta be 75mm diameter, its close but doesn't touch the bonnet, then the bonnet curves up another 50mm so there should be at least a bit of clearance. With things like this I stick blu-tac to the bonnet (or whatever) and then close the lid gently, you will then see a witness mark which is exactly where the collision is. HTH Quote Link to comment Share on other sites More sharing options...
Daan Posted July 5, 2016 Share Posted July 5, 2016 I am pretty sure the 300 sits higher to clear the front axle in the forward position. A slight speedhump in the bonnet maybe? Quote Link to comment Share on other sites More sharing options...
Disco-Ron Posted July 6, 2016 Share Posted July 6, 2016 Is your vehicle a genuine 300?. I've seen retro fit engine mounts welded on too high and too low before now. ... that might explain it? Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted July 6, 2016 Author Share Posted July 6, 2016 Its genuine as per my footer Ron although its military. The bonnet underside look same as a 300 although with a few additional screws in it and its hitting just to the outside edge of the strut under the second hole. All i can suggest at the momnet is the 24v Alt is a larger diameter but not got one to check it against. I'm toying with getting a 755 belt rather than the 803 thats there and seeing is that "cants" it back enough. I've also asked if anyone can get me a generic 24v alt from a merc or Iveco or something which might be a better diameter and also give me a get out of jail free card if my alt goes like it did on the last trip (also carrying a faulty spare,,, so DOH!!). We are planning on leaving again but only once the truck is ready. To do so i think i might need to shut the bonnet. I will post some photos but I'm out for the next couple of days. Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted July 6, 2016 Author Share Posted July 6, 2016 To cover off a few other points. The bonnet is squaddy'd and damaged but its a ding not bent. The Airbox looks way lower than my Alt. Thanks for all the pointers and help. More head scratching to do! Quote Link to comment Share on other sites More sharing options...
pete3000 Posted July 6, 2016 Share Posted July 6, 2016 Have you got a picture? i'll try and get one tonight of mine 24v in a/c position. shouldn't be anywhere near bonnet... The OE bracket is a flat plate with no tensioner, i.e four holes to bolt to timing cover then two at 90 degrees to take the A127 style 24v alternator. The belt tensioning is done with an a/c idler and offset pulley in the injection pump timing hole. then uses a standard a/c belt Quote Link to comment Share on other sites More sharing options...
Happyoldgit Posted July 6, 2016 Share Posted July 6, 2016 A photo would certainly clarify matters. 1 Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted July 6, 2016 Author Share Posted July 6, 2016 This any help? Quote Link to comment Share on other sites More sharing options...
pete3000 Posted July 6, 2016 Share Posted July 6, 2016 Yes picture is worth a thousand words.... . The nose of the alt looks tilted upwards and the alternator is raised up by the tensioner... Just off to see if i can find some pics to illustrate... idlers/tensioners http://www.allbrit.de/UNI.cfm?PAGE=749004&SPRACHE=EN Quote Link to comment Share on other sites More sharing options...
pete3000 Posted July 6, 2016 Share Posted July 6, 2016 Take it you have downloaded a copy of http://forums.lr4x4.com/index.php?showtopic=97407 Chapter 2-1-23 has the info you may find of interest The bracket ERR5870 is the one i have, the glyn lewis one looks v.similar but uses an alt bracket strap for tensioning, which is lifting the alternator up. I'd be tempted to lock it off at it's lowest adjustment and see if the bonnet will close, then if possible get the air con idler and bracket to do the tensioning. Which should mean you could use standard belts in the field. Quote Link to comment Share on other sites More sharing options...
GW8IZR Posted July 6, 2016 Share Posted July 6, 2016 I'm _sure_ the one of those I saw was fitted the other way round with the adjuster at the wing side, it looked much lower than that? Ignore me I'm talking nonesense.... Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted July 6, 2016 Author Share Posted July 6, 2016 Take it you have downloaded a copy of http://forums.lr4x4.com/index.php?showtopic=97407 Chapter 2-1-23 has the info you may find of interest The bracket ERR5870 is the one i have, the glyn lewis one looks v.similar but uses an alt bracket strap for tensioning, which is lifting the alternator up. I'd be tempted to lock it off at it's lowest adjustment and see if the bonnet will close, then if possible get the air con idler and bracket to do the tensioning. Which should mean you could use standard belts in the field. Thanks i google found that a bit ago. The plan was to do just that, next. Maybe a shorter belt will sort it but as you say i need to see if even at the minimum it will close. Which i will do on Thursday when i'm back. I'll report back. Quote Link to comment Share on other sites More sharing options...
David Sparkes Posted July 6, 2016 Share Posted July 6, 2016 Take it you have downloaded a copy of http://forums.lr4x4.com/index.php?showtopic=97407 Chapter 2-1-23 has the info you may find of interest .... I hadn't, but have now corrected that oversight. In payment, Chapter 2-1-23 is PDF page numbers 143 to 145. Regards. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted July 6, 2016 Share Posted July 6, 2016 Could always put a longer belt on, swing it away from the engine and bonnet rib. Quote Link to comment Share on other sites More sharing options...
mad_pete Posted July 6, 2016 Share Posted July 6, 2016 Cut a hole in the bonnet and run it out the top like Mad Max did with his ? ;-) 2 Quote Link to comment Share on other sites More sharing options...
pete3000 Posted July 8, 2016 Share Posted July 8, 2016 Pictures.... 2 Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted July 8, 2016 Author Share Posted July 8, 2016 thats great thanks. I'm gonna see if it will ever fit with no tension on my belt and then figure out if a shorter belt will leave it lower down. Might have time today. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.