Anti-roll Bar Schematic
Monday, May 18th, 2009
I thought I post these images from the workshop manuals of how the 109 ambulance anti-roll bars are fitted. I’m only fitting the rear bar, and as mentioned have had to be a little creative because the main span of the bar normally passes through the area occupied by a 109’s rear fuel tank, where fitted (MoD 109s, including FFRs , GS models and ambulances, use twin front tanks and have no aft tank).
The solution was to swap the spring plates around so that their arms and the vertical links sit ahead of the axle instead of behind it, allowing the antiroll bar and its mountings to sit directly behind the bump stops, clearing the fuel tank and the axle on full spring compression.
I am having mounting brackets similar to those welded to ambulance chassis fabricated for bolting on to the rear chassis rails, just behind the bump stops. The brackets are to be made of 5mm steel plate to make them rigid, and as such I won’t need to it anti-crush tubes to the bolt holes I drill through the chassis – the bolts and nylock nuts will be nipped up but not over tightened.
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March 26th, 2010 at 16:22
Thankyou for putting up the nice detailed drawings about the anti-roll bars.
Do you have the list of parts that gives names and LR part numbers to the items in the drawings?
Did you ever make the Mark 2 drawing of your revised mounting bracket?
And of course – have you any photos of the completed installation you can put up? (Perhaps amalgamate the two Anti-Roll bar articles? I don’t know the work involved.
Thanks.
March 26th, 2010 at 17:43
The photos of the completed installation are on the Anti-roll Bar Fitted post; if you select “Suspension” from the navigation menu on the right, you will find that post more easily.
The photos show the slightly extended mounting brackets, which were modified to create a bolt fixing point with plenty of meat on it aft of the chassis’ fuel tank bracket, however, the fabricator made the extensions too shallow to allow this, so the fixing bolts all run through the original section of each bracket and the alteration was unnecessary. The photos show a cut out on the inboard vertical face of each bracket, which is all that is needed to clear the fuel tank bracket.
The exhaust routing had to be brought slightly inboard to prevent the exhaust fouling the rubber D-bush, but that was fairly simple.
I don’t have any part numbers as I do not have the optional parts catalogue, but any LR part supplier should be able to help.