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Pictorial Review: 8451 Dump Truck / Road Grader


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#1 Lost_In_Noise

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Posted 18 November 2012 - 07:20 PM

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8451 was released in 2003, contains 183 pieces, and features articulated steering via HOG and tilting bed.Brickset reports a retail price of $20, and that's about the same as the average BL price. The B-model of this set is a road grader, the only one seen in Technic.

The parts

The panels in this set is somewhat of a rarity, this item is only seen in this and the 8455 Back-Hoe.

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The smaller panel #5 is a bit more common, and featured in the above sets and the Hauler.

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The wheels are 6 of the Tire 43.2 x 28 Balloon Small, which are perhaps most known for their presence in the Power Puller set.

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There aren't many gears in this set, but these 5 are enough to make the dumper and the road grader function.



A model: Dump Truck

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The front part with the cocpit is made first as a separate element. It consists mostly of thin liftarms, and the HOG axle runs through the center.

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The HOG is geared down to a 1:2 ratio with these meshing gears.

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Here is the finished cocpit. Turning the HOG light moves the perpendicular axle connector from side to side.

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The bed tilting works by a lever mechanism. Simple, but effective. This is how the tilting setup looks before the bucket is placed.

Half the bucket in place. Now you can see the whole tilting mechanism.

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Now that the bed is finished, all that remains is attaching it to the front.

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A 2 axle secures it in place, you can see it to the left of the DG 3/4 pin. The 6 wheels are attached by frictionless pins. Now the model is finished.

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Turning the Light Gray 20T DB gear tilts the bucket.

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This is as far as it goes. Enough to lose any load.

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In comparison with 8264, it's simply dwarfed.

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B model: Road Grader

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This build starts with the rear end and axle leading to the scoop/bucket. Interestingly, this has more steps than the main model; 44 vs 29. It uses 162 pieces, leaving 21.

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Here you can see how the grader arm is elevated.

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This 12T DB gear is mounted directly on a pair of 3L thin liftarms with a frictionless pin. This will act as a HOG.

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The grader is mounted, now the front axle is all that remains.

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This model uses a pushrod system to steer. A set of liftarms links the input to the axle.

And finished! Let's have a look....

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That grey gear is easier to handle than it seems.

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The steering angle is limited by the axles with bushes on them. But still the grader is able to make tight turns.

Scoop movement:

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Verdict

This is a nice little set, which works flawlessly in all ways. The dump truck looks really nice, considering the limited parts supply. The road grader also looks better than the 8828 B-model, but I've seen far better MOCs around. It's a bit bigger than your average mini set, such as the Tracked Crane of this year.

Thanks for watching/reading. As always, big pics are @ BrickShelf

Edited by Lost_In_Noise, 19 November 2012 - 12:30 PM.

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#2 timslegos

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Posted 18 November 2012 - 08:55 PM

I remember really liking this set when I first got it.  Great review, it brings back memories :classic: .

tim

#3 DarkShadow73

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Posted 20 November 2012 - 04:49 PM

I always liked the road grader model, unfortunately I gave it away to a neighbor kid...now it fetches a lot more money...not that I could sell it, no box, kept the instructions though...a great compact model that works well with the 8453 Front Loader that if I recall came out the same year...

#4 tibivi

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Posted 20 November 2012 - 08:03 PM

Great review :thumbup:
But I think their was another technic road grader in the 8074 set.
Keep on making such reviews !

Tibivi
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#5 legomuppet9

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Posted 20 November 2012 - 08:51 PM

View Posttibivi, on 20 November 2012 - 08:03 PM, said:

Great review :thumbup:
But I think their was another technic road grader in the 8074 set.
Keep on making such reviews !

Tibivi

I think you are right http://www.brickset....ail/?set=8074-1 lets say its the only road grader in studless :wink:

#6 DarkShadow73

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Posted 21 November 2012 - 01:48 PM

View Postlegomuppet9, on 20 November 2012 - 08:51 PM, said:

I think you are right http://www.brickset....ail/?set=8074-1 lets say its the only road grader in studless :wink:

@legomuppet9 - the 8074 is good set, but I still like the clean lines of the 8451 grader best.  Amazon has a couple available, but high priced too.

#7 legomuppet9

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Posted 21 November 2012 - 02:49 PM

View PostTechnicFreak, on 21 November 2012 - 01:48 PM, said:



@legomuppet9 - the 8074 is good set, but I still like the clean lines of the 8451 grader best.  Amazon has a couple available, but high priced too.

Have you looked on eBay or bricklink?




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