Need length of cable (wire rope) on the M108 crane

[ida34]

I need to replace the cable on the M108 crane. Mine is in rough shape and I am certain it has been shortened. Anyone have an idea of length? Also, what is the best place to get cable? Tractor supply has the right size but it is a fiber core and lifting cable should be not be fiber core.

Thanks
Chuck

 

[porkysplace]

There is some info in this thread ; MM543 boom cable length

There is a cable supplier in Flint can't think of the name .

found it ;
www.cmwirerope.com/home.nxg

 

[gimpyrobb]

Chuck, fiber core is stock and correct for the truck.

 

[doghead]

But the cable at TSC is not what he wants.

Iirc, the correct cable is IPS fiber core and has a 19000 lb rating.



4010-00-274-6816, RRW410, 002746816, 4010002746816 Official Source

4010-00-274-6816 22-R-1365 80244 WIRE ROPE,STEEL: PLOW,GLVD,
FIBER COVER REGULAR LAY,
1/2 IN.DIA,6 X 19 CABLE​

(M60,M10 FT 200(length)

This is from the TM, TM9-2320-209-34P

fwiw, the front winch cable is the same stuff.

 

[Recovry4x4]

Right, wrong or otherwise, here's what I did. Instead of loading the drum, I bought the amount I thought would provide me with everything I wanted to do. I settled on 100'. Having some background in the towing business, I went the the wire rope supplier most widely used in the area and told them I needed 1/2" cable for my crane with a loop swaged in one end. I know it's cable approved for the towing industry and it's not given me a single issue.

 

[zebedee]

Just to clariffy a point here, has anyone ever tried to wind on beyond the single grooved layer? Is there room between boom and jib?

There was another post thread which stated that even "real" cranes (not wreckers) have grooved drums - for the first layer, but then wind on hundreds of feet more. (The length of the lead-in results in only a very slight angle change - never getting enough to stop the lays from getting out of control.)

No one has mentioned either, that the 819 with it's three part boom, requires much more cable to get the hook to the floor at full stretch, full reach and three part line than the 816, 543 etc., only having a two piece boom. Apples and oranges people...

So Ron - does the 819 have a bigger drum than 816 to allow your hook reach the floor yet still only wraps one layer when fully stowed?

"Annoying" schematic below!

NB- I cannot confirm 2 or 3 fall hooks on earlier wreckers

 

[73m819]

The 819 is a DIFFERENT crane then the 816, I have not measured but it must, on mine (819) with the boom all the way out (26') and all the way up, the hook is just a tad off the ground and still have the safety wraps.

For those that want to RESTRING the hoist cable, DONOT use a thicker cable (1/2" is OE), it will NOT fit in the flutes on the drum correctly, will ride over the flutes which in turn will force the follower up, relieving the tension on the drum cable and then may cause a mess when unwrapping for a 3 part rigged hook due to the lite amount of weight on the drum line.

The bad thing about the wrecker hoist cable drums is that the drum sides ARE ONLY one wrap high, if you try for more then ONE wrap, the cable wants to ride up on the drum side and wedge against the curved back, instead of being forced back starting another wrap

 

[Stretch44875]

Not sure on length, but with a single layer full drum, and hook all the way retracted, I have enough cable to make a double line hook touch the ground at full height.

 

[m16ty]

There was another post thread which stated that even "real" cranes (not wreckers) have grooved drums - for the first layer, but then wind on hundreds of feet more. (The length of the lead-in results in only a very slight angle change - never getting enough to stop the lays from getting out of control.)

Every crane I've ever seen (and I've seen quite a few) had a smooth drum. I have seen crane drums with grooves worn in them though.

The main difference in the way a crane is set up and a wrecker is that cranes always have a weighted hook that keeps the line right on the drum. The wreckers rely on the grooves and the roller to keep the line straight because the block isn't heavy enough to keep the line tight.

 

[73m819]

Every crane I've ever seen (and I've seen quite a few) had a smooth drum. I have seen crane drums with grooves worn in them though.

WRONG

Cranes have lagging (what the drum cover is called) in both smooth and fluted design, the fluted lagging can be had in left, right, as well as upper, lower R/L lays, the flutes (groves) are sized for the cable. the reason for the flutes is to support the cable shape on the first wrap and to PREVENT the FIRST drum wrap from getting crushed by the subsequent wraps

The main difference in the way a crane is set up and a wrecker is that cranes always have a weighted hook that keeps the line right on the drum. The wreckers rely on the grooves and the roller to keep the line straight because the block isn't heavy enough to keep the line tight.

This is also wrong,

Think you will find most civi wreckers have a SMOOTH drum, just as the truck winch drums, cranee often have a end of line weight problem, sometimes a second ball is used, on multi part rigging, the weight problem can happen real easy.

 

[Recovry4x4]

Hehe, I still have the factory headache ball with my M108.

 

[m16ty]

[/COLOR]

This is also wrong,

Think you will find most civi wreckers have a SMOOTH drum, just as the truck winch drums, cranee often have a end of line weight problem, sometimes a second ball is used, on multi part rigging, the weight problem can happen real easy.

Why is my first quote wrong? I just said I'd never seen a fluted drum on a crane. I wasn't saying none existed, just that I'd never seen one. Also, there is no second rap on a wrecker drum.

I see what you are saying on the second part but take the fluted drum and roller off the wrecker and see how fast the cable "birdnest". These two items are needed to keep the line straight on the drum. You are also correct about cranes not having enough weight on the hook sometimes but on a lot of cranes the weight of the hook is the only means by which the line stays straight on the drum. Granted, a lot of bigger cranes also have a tension roller on the drum to help the line lay right but most of the smaller ones do not.