Piggy back questions

[Grumpy1822]

I just picked up some gh piggy back caps for the Baja. Do I fill the resivoirs too? They have some foam pieces in the now. Are they supposed to stay in there? Never delt with piggy backs beffore.

 

[Scott]

I had a set of integy piggyback shocks and the foam stayed in is there a hole in the center? Yes I filled them up about half way. Then put the foam back in. This is what the instructions said.

 

[Jeremy]

Yea you will need to fill the piggy backs ... How much ? Not sure

 

[Grumpy1822]

Yep there is a hole in the center. I guess I'll leave the foam and fill with oil.

 

[fallenangels]

Take the foam out, compress the shock all the way down with the spring off, and fill the hole a lil less than half way up on the piggy back, then reinsert the foam...close it up and you should be ready to go.

 

[maximusraylius]

I only ran piggy backs once. You do full the resavore. I took the foams out of mine. Seamed to be smoother with out them. Does the caps have a bleeder on them? I filled the caps and shocks. Then bleed off the access till they were smooth with out being springy feeling.

 

[ScooterB]

The foams are there to compress as the shock compresses. Oil will not compress. All shocks need a way to allow for the displacement of fluid as the shaft compresses and enters the housing.
Some shocks like the big bores use bladders to accomodate this. Others use foam. Cheap shocks like the savage stock shocks require a small amount of air.
Fluid is like a solid it will not compress. Air or gas will.
Bladders separate the air from the fluid to prevent foaming. Foam encapsulates the air.
The number one reason for blown shocks is due to lack of air in the reservoir to allow for the displacement of the shaft.
Check your shocks before mounting fully compress them with the springs off they should only have a small amount of rebound. If they are hard to compress fully or rebound quickly from full compression they do not have adequate air space.

 

[Bankrupter]

The foams are there to compress as the shock compresses. Oil will not compress. All shocks need a way to allow for the displacement of fluid as the shaft compresses and enters the housing.
Some shocks like the big bores use bladders to accomodate this. Others use foam. Cheap shocks like the savage stock shocks require a small amount of air.
Fluid is like a solid it will not compress. Air or gas will.
Bladders separate the air from the fluid to prevent foaming. Foam encapsulates the air.
The number one reason for blown shocks is due to lack of air in the reservoir to allow for the displacement of the shaft.
Check your shocks before mounting fully compress them with the springs off they should only have a small amount of rebound. If they are hard to compress fully or rebound quickly from full compression they do not have adequate air space.

Very good post ! but shoot for zero rebound as apposed to a little...