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Self-Levelling Strut..... What year introduced?


SimonPearson

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What are the effects of removing the Boge Unit?

As well as levelling the suspension(by pumping itself up to a preset point when driving down the road when loaded), the self levelling unit also assists the rear springs. So if you take it off, you will not only lose the self levelling ability, but you will also have very soft rear suspension(because you have lowered the overall spring rate). This may be too wallowy a ride on the road, and the back of the Rangie will sag with smallest of loads. The common fix for this is to fit heavy duty rear springs.

Regards,

Diff

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As well as levelling the suspension(by pumping itself up to a preset point when driving down the road when loaded), the self levelling unit also assists the rear springs. So if you take it off, you will not only lose the self levelling ability, but you will also have very soft rear suspension(because you have lowered the overall spring rate). This may be too wallowy a ride on the road, and the back of the Rangie will sag with smallest of loads. The common fix for this is to fit heavy duty rear springs.

Regards,

Diff

Is there any way of testing the BOGE unit to see if it still works?

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Is there any way of testing the BOGE unit to see if it still works?

Yup, easiest is to drive around the block UNLADEN, bring RR to a gentle stop(so the back doesn't raise artificially) on level ground. Measure the distance between the bump stops and the rear axle and note it down. Then load the back of the RR with some REALLY HEAVY stuff, such that the back sags down. Measure the bump stop clearance again. Go for another drive araound the block, park up gently in the same spot and measure the bump stop clearance. It SHOULD have now pumped the back up so that the clearance is the same, or very close to the first unladen measurement you took, and certainly more that the second set of measurements.

Don't measure bumper heights from the ground or similar, because it doesn't take into account any 'squashing' of the tyres with a full load.

Regards,

Diff

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  • 2 weeks later...

The Boge unit has a damping effect in addition to self levelling, it will tend to compensate for both weak springs and dampers.

Easiest way to find out is disconnect it and go for a drive, you might be very surprised, I know I was :blink: .

Without it you might need slightly heavier springs (as above) and heavy duty dampers if you want to maintain as near original handling as possible.

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