RC Tank Warfare community hobby forum

Ludwig von wigbearer wrote:Have you cross threaded the screws

regards john

Cross threaded?

Son of a gun-ner wrote:Are the screws different lengths? Maybe an extra washer under the screw heads.

They seem to be the same length, though I'll check

c.rainford73 wrote:Sounds like some mismatched parts. Can you measure the length of the screws and do a side by side comparison

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I'll try that.

AshMann wrote:

c.rainford73 wrote:Sounds like some mismatched parts. Can you measure the length of the screws and do a side by side comparison

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I'll try that.

I thought it was mentioned that these were the original Heng Long screws that came with the tank and worked ok with the original Heng Long sprockets?

Son of a gun-ner wrote:

AshMann wrote:

c.rainford73 wrote:Sounds like some mismatched parts. Can you measure the length of the screws and do a side by side comparison

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I'll try that.

I thought it was mentioned that these were the original Heng Long screws that came with the tank and worked ok with the original Heng Long sprockets?

They worked fine with those, for the short time I drove it with those on.
here are both screws side by side https://media.discordapp.net/attachment ... 084856.jpg

This is what came with the sprockets and idler wheels https://media.discordapp.net/attachment ... 085124.jpg

remove the sprockets, do both screws screw in and out easily on the driveshafts or does one go tight when not fully in, if that happens its probably cross threaded, try putting a bit of oil on the screws and work them in and out before refitting the sprockets.

Ludwig von wigbearer wrote:remove the sprockets, do both screws screw in and out easily on the driveshafts or does one go tight when not fully in, if that happens its probably cross threaded, try putting a bit of oil on the screws and work them in and out before refitting the sprockets.

One of the screws tightens up before its fully in, though its doing that on the left driveshaft instead of the right one, also what kind of oil do i use? WD40 or something?

Ash I'd follow Ludwig's advice, one screw has some debris on the threads could be from the gearbox final drives?

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c.rainford73 wrote:Ash I'd follow Ludwig's advice, one screw has some debris on the threads could be from the gearbox final drives?

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I noticed that, but I'm wondering if it's cast sprocket debris. The screws and shafts are both steel, the black on the screw should surely wear off a bit and show the silver metal below if there was thread damage.
But, after saying that, the thread in the shaft could have been poor quality to start with.