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Difference in grove tms700b - 750b

steve waldner

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Jul 5, 2017
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huron sd
4380A990-9397-401A-8D47-5B994FE58F8E.jpeg I got a tms750b and when I repainted it , I put 700b decals on it . I didn’t know at the time it was a 750b
 

Knepptune

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Nov 22, 2012
Messages
757
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Indiana
I think the year. I believe the 700b is the earlier version and the 750b was later but I don’t know. Could be opposite of that.

For any practical reason they’re the exact same crane.
 

crane operator

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Mar 27, 2009
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8,273
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sw missouri
The total series are considered the "700" B series of cranes.

In the RT versions, they offered a 720,730, and 740. The only difference in the 730 and the 740, is the 740 has a 4th sheave on the main boom head, the 730 only has 3. The 740 has a 10' radius chart, the 730 starts at 12'. The extra sheave and the 10' instead of 12' chart gives the 740 the ability to lift 40 tons, instead of the 730 being limited by line pull (one less sheave) and radius (2' difference) to only 30 tons. I've never seen the chart for the 720's but I suspect its limited to 20 ton.

The chart (except for the first 2') are exactly the same for the 730 and the 740. They are exactly the same crane, except for a extra sheave on the boom head and the 10' instead of 12' radius in the chart.

I think that the same thing is going on in the tms (truck crane) version. I think the truck cranes get a little more capacity because they have a little more counterweight than the rt's. But the upper is the same basic structure as the rt's in the 700 series.
 

Knepptune

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Nov 22, 2012
Messages
757
Location
Indiana
. Interestingly enough grove doesn’t have a separate data sheet for the tms700b and the tms750b but does show different data sheets for the rt700b and rt740b

If they didn’t change the model number at a certain model year I suspect they were derating cranes to get around union laws in some areas. If they called the crane a tms700 they could rate it whatever tonnage the customer wanted, and if it was a tms750 it was a 50t.

As far as I know they’re still doing that with the tms700e and tms760e. The 700e can be derated to a 50t and the 760e is a 60t. And just like the earlier cranes the only difference is the load chart within 15’.
 
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crane operator

Senior Member
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Mar 27, 2009
Messages
8,273
Location
sw missouri
:) Man, I love it when I get one over on knepptune. I will mark this day down, and remember it with fondness.

The 750's are a bigger rt. They use the wider rt carrier (11' vs10'), double boom lift cylinders, and the heavier boom. They are probably most like the older series tms 760's (which had a little longer boom),they still had dash levers for controls and the old cabs too, up to the late 90's early 2000's.

The 730/ 740's have the 110' boom with the single lift cylinder just like the 700 series truck cranes. With the newer cabs, pilot hydraulics, and a little lighter boom.

The tms640 truck cranes with 105' main had a corresponding RT, it was the 640 rt, but they called it the "C" model in the rt, with the 105' boom and the smaller jib (both 640's jib's are only 29' retracted the main boom isn't long enough for the 32'-34' jibs. The 700 series jibs are longer, they have more main to hang it on.

Interestingly enough, there are places in the charts, where a 640 rt will outpick a 740rt, the 105' boom is lighter than the 110' and it gets a little more chart because of that.

But the 750's in the rt's are the last of the old school heavy boom groves, with the old control style.

You've been working too long on that new stuff knepptune- GMK, potain, and all that other oddball stuff. :)
 
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