removing leaves from Cub camper suspension

Submitted: Monday, Mar 07, 2011 at 14:04
ThreadID: 84854 Views:5189 Replies:3 FollowUps:8
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Having owned an offroad Cub Supamatic for nearly 2 years, I find that the leaf springs (a 7 pack setup with military wrap and shocker) are too stiff. A mate following behind has confirmed that even over rough tracks the tyres do most of the work. I tend to have a light load, so I reckon the whole lot would weigh about 800kgs with 120 on the ball. Has anyone ever removed a leaf or two from their springs? What effect did it have? Which leaves should I remove?
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Reply By: Roughasguts - Monday, Mar 07, 2011 at 14:35

Monday, Mar 07, 2011 at 14:35
Your probaby better off buying a 5 leaf set it wil be a lot easier and cheaper in the long run.

Cheers
AnswerID: 447574

Follow Up By: Ozrover - Tuesday, Mar 08, 2011 at 19:25

Tuesday, Mar 08, 2011 at 19:25
I agree,

After two years of bouncing around the springs will need to be replaced sooner rather than later, get another set of the correct weight springs & keep the old ones as spares.

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Follow Up By: Outbackogre - Wednesday, Mar 09, 2011 at 09:07

Wednesday, Mar 09, 2011 at 09:07
Thanks, I will investigate this.
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Reply By: Member - Keith P (NSW) - Monday, Mar 07, 2011 at 16:23

Monday, Mar 07, 2011 at 16:23
I removed the second and third leaves from the BOTTOM of spring pack on my 2003 drover...and basically could not believe the difference...well worth it IMO.
I also...at the same time....got rear shackles made up with an extra 45mm spacing between the holes...and this more than made up for what little droop there was after removing leaves. I also installed a 12mm spacer under springs on top of axle to makeup for the gap left ...so as to reuse the original U bolts...and give a touch more lift.
All was worth doing ...but yu may have to source longer shocks. I used the fronts off a Hi-Ace van.

HTH

Cheers Keith
Nothin is ever the same once I own it ...........

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Follow Up By: Outbackogre - Monday, Mar 07, 2011 at 19:27

Monday, Mar 07, 2011 at 19:27
Thanks guys. Keith, can you confrm that you have the 7 leaf pack? I'm tempted to remove the second and fourth (from bottom). The fourth leaf is the one with the mounting bracket for the two rebound springs on top of the pack. I suspect these are redundant with shockers fitted.
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Follow Up By: Member - Keith P (NSW) - Monday, Mar 14, 2011 at 00:14

Monday, Mar 14, 2011 at 00:14
Yes ..I had the 7 leaf pack.
The reason for leaving the bottom most leaf was to "slow down" or limit the amount the springs bent on a real hard wallow or bump in the road at speed ....as the spring pack was a lot more flexible than original. You would be surprised at how much a spring pack could flex...believe me!
I would not remove the spring with the holders...as you mentioned...unless you plan to relocate holders onto another leaf ....as these holders keep leaves in line and prevent them from moving sideways...which they will do ...no matter how much you could tighten U-bolts.
BTW...shockies are very necesary once leaves are removed to prevent trailer getting up the "pogo-stick" effect.
HTH.

Cheers Keith
Nothin is ever the same once I own it ...........

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Follow Up By: Outbackogre - Monday, Mar 14, 2011 at 09:17

Monday, Mar 14, 2011 at 09:17
Thanks again Keith. Your ecperience seems very similar to Shaker's. I'll either remove 2 leaves or fit new 5 leaf packs. The 5 leaf packs I've investigated (Al-ko and Meher) are rated at 1150kgs, which should be adequate for a trailer weight of about a tonne (remembering that 10% of this will be on the ball). The 7 leaf packs are rated at 1530kgs, which seems ridiculously high (more than twice the tare weight of my trailer). Cheers. Rob.
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Reply By: Shaker - Tuesday, Mar 08, 2011 at 12:11

Tuesday, Mar 08, 2011 at 12:11
In the past we have removed the bottom 2 leaves & then shortened the bolt.

When will manufacturers learn that most camper trailers are oversprung?
AnswerID: 447657

Follow Up By: Outbackogre - Tuesday, Mar 08, 2011 at 12:23

Tuesday, Mar 08, 2011 at 12:23
Thanks Shaker, I'm really tempted to do this mod. I just hope that the extra travel of the leaf pack doesn't cause so much more stress that it leads to cracking of a leaf. Then again, I suppose they are designed to flex. The 2 bottom leaves on my trailer are very short. What did removing them achieve in your case?
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Follow Up By: Shaker - Tuesday, Mar 08, 2011 at 22:32

Tuesday, Mar 08, 2011 at 22:32
I am assuming that you have shock absorbers, as you will need them.
Removing the 2 bottom leaves made the springs actually work, instead of just 'going along for the ride'. The camper rode much smoother & didn't bounce, as they do when the tyres are trying to do the job of springs.
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Follow Up By: Outbackogre - Wednesday, Mar 09, 2011 at 09:10

Wednesday, Mar 09, 2011 at 09:10
Thanks Shaker, yes I have shockers. I've removed them for inspection and they seem to be in good condition. I think I'll investigate the cost of new 5 leaf packs.
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