9 replies to this topic

[bishbosh]

I'm stuck.

I have a Merc Benz SLR 300 1955 and have trued the wheels and tyres, glued in motor and so on but when I get the power down the thing bounces along, it seems to lift on its left rear tyre - I've checked it out and it looks fine. The bounce doesn't cause de-slots but it means I ease off the power.

Any ideas?

Thanks in advance.

[Yngwie]

Is the chassis straight? I have found that quite often the chassis are warped which causes the bounce. Put the car in the slot of your track and press down on the front right and front left side. If one goes down more than the other you probably have a warped chassis? Get back to us if this is not a problem!

Regards

John

[SlotsNZ]

Have you "collared" the axle inside the bushes?
(light oil, blow out, fill with super-glue, let half set, run at 2 - 3 volts etc)

If not, the amount of slop in scaley rear bushes is enough to make that axle slap around like nothing on earth.

It's an inline too isn't it?, which means that when you put the load on to accelerate, there are twisting forces that want to twist the chasiss, and the load is also applied "diagonally" to the axle, forcing one side of the axle to the top of the bush and the other side to the bottom of it's bush.

I do all Scaley and Ninco cars automatically now if I am not upgrading bushes/axles/wheels

[Ember]

SlotsNZ, the Scaley 300SLR is offset inline. Surely that can only add to the grief.

[bishbosh]

Thank you folks.

I will give these things a go and let you know how it goes...

[munter]

I'm not familiar with the internals of this car from a first hand point but the problem is a typical plastic chassis one...we've heard this many times.

My suggestions would be ...
1) superglue the rear bearings into their uprights
2) superglue the driveshaft bearing into its upriht(I think from memory it has one)
3)Check that the tires are indeed glued properly all the way around the rim.
4) keep looking..............take the body off and hold the rear wheels between finger and thumb.
Then with the other hand lightly twist the chassis from the front backward and forward....watch for things moving in their position i.e. the bearings or motor.

Before glueing make sure the parts are degreased with ligher fluid.

regards

[bishbosh]

Touch wood it's not doing it anymore. Opened it up and the drive-shaft bearing had come loose. Re-glued this a.m and just tried it this evening, no bounce

Thanks.

[munter]

Great to hear it..I hope you figured what I said inspite of my spelling error.
regards

[grandtorino92]

the pinion my not mesh with the crown and becaus eof the offset motor it is only lifing the one rear tire

[munter]

grandtorino92, on Apr 9 2010, 11:08 PM, said:

the pinion my not mesh with the crown and becaus eof the offset motor it is only lifing the one rear tire

maybe but I find plastic chassis cars all need some form of tightening or bracing of the drive line,especially so when you want to go faster.