Gerasimek's Tree-mek

classictruckman said:
You lose the length of the cab+hood or the deck, you're 100' of boom turns into an 80' boom. Much better to get a rear mount.
Click to expand...

You can't put a large kboom on the back of a short wheelbase truck according to the engineer that I spoke with when I was setting up my truck. Mine is only a 13ton with 60' and he said it would pull the truck right over if rear mounted
 
He has no idea what he's talking about, I've found that too while talking to different truck builders. Rear mounted gives you the most counterweight while reaching over the back and the most stability while reaching over the front.

When my kboom was being built they were adamant they would have to add 3-5k lbs to the front end for more CW, I wouldn't let them, when they load tested it at completion it was the most stable truck they ever built.
 
classictruckman said:
He has no idea what he's talking about, I've found that too while talking to different truck builders. Rear mounted gives you the most counterweight while reaching over the back and the most stability while reaching over the front.

When my kboom was being built they were adamant they would have to add 3-5k lbs to the front end for more CW, I wouldn't let them, when they load tested it at completion it was the most stable truck they ever built.
Click to expand...

What kind of knuckleboom and truck do you have?
 
Boom is a 57' 13ton. Hiab 300-4 w/ jib 90 flyjib
My truck is about 24' bumper to tail, weighs less than 20k. Engineer was definitely playing it safe but with the wheelbase and light weight, when I asked which would be better front or rear mount, he said definitely cab mount. Utility companies uses similar boom and truck for hauling poles on a pole trailer and load chart has to be adjusted with trailer on or off.
Boom has the 2 main outriggers with it. We are adding tail and front outriggers as well to keep the chart as high as possible
 
Class
james mauldin said:
Boom is a 57' 13ton. Hiab 300-4 w/ jib 90 flyjib
My truck is about 24' bumper to tail, weighs less than 20k. Engineer was definitely playing it safe but with the wheelbase and light weight, when I asked which would be better front or rear mount, he said definitely cab mount. Utility companies uses similar boom and truck for hauling poles on a pole trailer and load chart has to be adjusted with trailer on or off.
Boom has the 2 main outriggers with it. We are adding tail and front outriggers as well to keep the chart as high as possible
Click to expand...
I do not get envious of much...other then pilots. Kboom cranes for tree work bends me right over... In the most non gay way. I'm bowing in respect from the front side.

Why would any one not get front and rear outriggers , of course unless there is no way of tippin. Just the removal of the vehicles suspension from the equation makes things simpler, no? I'm down with the rear mount action. Not as common, but seems people are surprised with the results. Don't the build folks do a test to determine computer limited reaches, after built?
 
frashdog said:
Class

I do not get envious of much...other then pilots. Kboom cranes for tree work bends me right over... In the most non gay way. I'm bowing in respect from the front side.

Why would any one not get front and rear outriggers , of course unless there is no way of tippin. Just the removal of the vehicles suspension from the equation makes things simpler, no? I'm down with the rear mount action. Not as common, but seems people are surprised with the results. Don't the build folks do a test to determine computer limited reaches, after built?
Click to expand...

I like being able to have a dump on the truck as much as SJTREEGUY does. So rear mount kind of kills that.
Also most smaller kbooms that I came across when looking for mine didn't come with secondary outriggers ie. smaller than 20k. Opdyke truck and Equipment in Pa. had probably 20 unmounted booms when I bought mine and none of those came with secondary outriggers. The Hiab engineer, who could be wrong as classictruck said, was very skeptical about my truck without several mods that I hadn't planned on. Most kboom trucks less than 20k capacity didn't have riggers anyway but the trucks are usually longer and heavier
 
james mauldin said:
I like being able to have a dump on the truck as much as SJTREEGUY does. So rear mount kind of kills that.
Also most smaller kbooms that I came across when looking for mine didn't come with secondary outriggers ie. smaller than 20k. Opdyke truck and Equipment in Pa. had probably 20 unmounted booms when I bought mine and none of those came with secondary outriggers. The Hiab engineer, who could be as classictruckman pointed out, be wrong was very skeptical about my truck without several mods that I hadn't planned on. Most kboom trucks less than 20k capacity didn't have riggers anyway but the trucks are usually longer and heavier
Click to expand...

Most used cranes don't include auxiliary outriggers, this is something that usually needs to be purchased separately.
 
james mauldin said:
Boom is a 57' 13ton. Hiab 300-4 w/ jib 90 flyjib
My truck is about 24' bumper to tail, weighs less than 20k. Engineer was definitely playing it safe but with the wheelbase and light weight, when I asked which would be better front or rear mount, he said definitely cab mount. Utility companies uses similar boom and truck for hauling poles on a pole trailer and load chart has to be adjusted with trailer on or off.
Boom has the 2 main outriggers with it. We are adding tail and front outriggers as well to keep the chart as high as possible
Click to expand...

Ok, this is a rough estimate, with the truck weighing 20k at 57' it would take 4210 lbs to tip it over. What is the boom rated for at 57' away?
 
frashdog said:
Class

I do not get envious of much...other then pilots. Kboom cranes for tree work bends me right over... In the most non gay way. I'm bowing in respect from the front side.

Why would any one not get front and rear outriggers , of course unless there is no way of tippin. Just the removal of the vehicles suspension from the equation makes things simpler, no? I'm down with the rear mount action. Not as common, but seems people are surprised with the results. Don't the build folks do a test to determine computer limited reaches, after built?
Click to expand...


The vehicle's suspension helps share the load with the outriggers on knuckle booms. On stick cranes the tires are usually off the ground.
 
james mauldin said:
I like being able to have a dump on the truck as much as SJTREEGUY does. So rear mount kind of kills that.
Also most smaller kbooms that I came across when looking for mine didn't come with secondary outriggers ie. smaller than 20k. Opdyke truck and Equipment in Pa. had probably 20 unmounted booms when I bought mine and none of those came with secondary outriggers. The Hiab engineer, who could be wrong as classictruck said, was very skeptical about my truck without several mods that I hadn't planned on. Most kboom trucks less than 20k capacity didn't have riggers anyway but the trucks are usually longer and heavier
Click to expand...
There are side dumps out there...if you have to have a dumper.


Yea I almost bought a 70' kboom from opdyke few years ago. Their go to mount guy could not handle the thought of a short wheel base. Ended up getting schooled by a palfiger dealer as to truck chassis, he was all about rear mounts. Ended up buying a rear mount bucket...as a stepping stone towards a kboom.
 
frashdog said:
All four, on sticks?

For kbooms even on angles where the suspension would hang? Or can kbooms not handle those kind of set up angles?
Click to expand...

Depending on the outrigger setup, usually on stick cranes all the tires are off the ground. Granted some boom trucks likely don't apply to that general rule.

Effer at the least prefers you to keep your tires on the ground when possible. Stick cranes usually need to be level to 1* or less, Effer rates their slew capacity as being able to swing being 5* out of level.
 
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