345C counterweight removal

Several large bolts and then lowers its self with its own chains and hydraulics.

 

no it was a silly setup
the booster was air and the trailer was trunion mounted
this is a rough drawing of the setup
the suspension was blocked at the front when you disconnected at the attachment point

 

Interesting, so the axles were essentially direct mounted to the the coffin box?

 

i am guessing that the one Oxbow is looking at is very similar to what we had back then and we had modular decks and beams
we had 23'cantilever, 26'deck, 27'beam plus 2 5' beam, 1 10' deck and 1 7' cantilever extensions.
all were interchangeable.
the most I used at once was 27' deck with 17' of extension giving me an overall length of 137' for a 42' pump section skid.

 

Here's the beam from my trailer. The round tube on the left is the pivot bar that attaches to the back of the trailer. The rust spots on the right are where the locking blocks sit when I'm running without the booster.



This is the pivot connection under the tail of the trailer. You can also see the booster pins.



That pivot is the only point where the trailer axles and booster connect to the deck.

 

In these pictures you can see where the beam sits under the rear deck. The blocks are slid to the side allowing the beam to free float under the tail with the booster attached.

 

So if you take the pivot point to the kingpin and divide that in 2 it will
Locate the center of weight for the trailer - this will push 50% of the weight to the forward groups and 50% to the back groups

In an east coast set up the distance would be from the center axle in tridem to the KP

This has the effect of moving the center of weight back 1/2 the distance from the center axle to the pivot (8-10’/2 or about 4-5’) so if the center of weight normally is bout center of the well (not exact but close enough) the in a 26’ well it would be about 13’ from the neck and 13’ from the transition. If you move the point back 4’ then you only have 9’ of well to get half the weight of the machine in.

Here is a picture of a 70k machine on my trailer with the Jeep but not the booster (trailer with traveling pins in) I was 61k on the trailer tridem and the footprint of the machine was only 14’. Hope the picture helps clarify

 

Be careful with getting inserts that weren’t built for your trailer - they are very hard to get ones that will fit. They are more like fingerprints than you would think. Vertical pin decks may be easier than for d than horizontal pins like mine or JDs new trail king. That is why You had to build my beam deck rather than buy one used.

 

The center of gravity should be between the king pin and the center point between the travel pin and the trunnion because the travel pins are applying weight to the front of the coffin.