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Managing a slack timing belt.

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Old 01-20-2005, 05:48 AM
  #46  
John Struthers
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So...
We are back to an annualTB inspection along with the auto crank walk inspection, right?
And why not?
Fwiw
All banter aside, the side-of the-road TB retention was probably wrong.
But the question begs to be asked: What would have happened if there was no on board toolbox?
Would it have resulted in a drive or tow home?
Disaster and its' expense has a way of thinning the herd or bank account. I for one can not afford
a disaster and tend to heed the horror stories.
Since I don't have the warn feature its an annual -at least- inspection and I still worry.
Doc,
I would trash my fellow enlisted scum for listening to "high-time" sfb pilots who advised wiping the 'fuzz' off the intermediate TR box plug sometimes twice to avoid a RON for maint.
Before the Huey's disappeared in Germany I got rid of a crewchief who was about to become 2nd flights Platoon Sgt when I watched his demo on how much fuzz was acceptable on the plug after a warn.
His drinking buddy the unit armorer joined him in the motorpool after giving a class on the M-60...his version had it firing from the closed bolt only... he also had a problem with turning the barrels on door mount M-134's - no power, no belt its' unloaded right? Bang in the Hanger! Jesus!
Check that belt!
Old 01-21-2005, 07:02 PM
  #47  
ColinB
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Jeez, did I touch a nerve or what?
On reflection I have to concede that Jim has a very valid point. (As usual). I should not have recommended this fix to others and for that I apologise unreservedly. The only reason I had the confidence to use it myself was that I know with certainty that at the last rebuild everything in the timing case was replaced or rebuilt correctly. The new belt was checked at 1500km and retensioned after 3000km IIRC and it has been visually inspected periodically via the breather port. I also test the belt warning system annually. So yes, it could have been a lot of things but the probability was that the belt, not retensioned for several years had stretched enough to trip the switch. That's the way it's designed.

But are you guys seriously telling me that at the first glimmer of a warning light you would call a breakdown truck? I can't believe it, that's hysteria. Even Porsche don't advocate that, it's not an "imminent catastrophic failure" warning. They give it a priority 2 only and tell you to get it seen to as soon as possible.

And I've just done that. The belt is a little on the slack side but everything else appears nominal. I'll tension it and check the tensioner oil tomorrow and I'll be back on the road by lunchtime with those two sawn-off spanners in my toolkit. I don't do breakdown trucks.

Colin 89GT

PS. Heinrich, you were close. Dwarskersbos, 42deg C outside. Promised to take my daugter to her end-of-the-holidays dance in the Porsche that evening. Call me highly motivated



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