Topica Loopframe_Guzzi Archive
 

Subject: RE: Generator Bracket Question

Author: Prusnek

Date: Nov 16, 2004, 6:07 AM

Post ID: 1717893328


Ian wrote:

 As for the generator bracket...looked like the PO (or whomever did the work)
had been too lazy to remove the oil line to get a straight shot at the bolts
so installed them at an angle. I'll have to helicoil (or timesert as
suggested). What is the diameter that should be used to predrill the hole?
I guess it depends on helicoil or Timesert; they each have their own
special tap that has the drill size stamped on it. A generous member of
this forum lent me his and I sent it back, so I can't tell you. I can
say that I made up a 1/2" thick block of steel with 2 holes in it to act
as a drill guide, bolt it on with one bolt and drill through the other
hole for the tap. It helps to drill a straight hole. .

 I
am wondering if the aluminum might be weakened by drilling the tap hole.
Not really, but you sure don't want to go too deep.

 I
am assuming that I should red loctite the inserts in place?
They're self locking, no loctite needed. You might want to loctite the
studs in place, however.

John Prusnek

 


 
 
Keith:
The generator should be pretty solid, while you have the tank off you
should definitely take a few minutes and take the generator off to
inspect the bracket. I've seen them cracked on the bottom between a
mounting hole and the side; sometimes a bolt comes loose and strips out
the aluminum threads in the engine case, possibly from being overtorqued
by someone before it got to you; always be mindful when cranking down on
a bolt threaded into softer aluminum threads. In one instance a PO
broke off one of the bolts in the case and retapped the remains for a
smaller one, nice piece of bodge work.
I've welded another piece of steel over the complete bottom of the
inside of the bracket as a repair (doesn't change the tension
dimension), and have done the standard repair of helicoils (better yet,
Timesertshttp://www.timesert.com/) and replaced the bolts with
locktited studs with nylock nuts and star lockwashers to hold the
bracket down. You'll need an angle drill attachment to do this with the
engine in the frame, I can lend you one if you go that route..

John Prusnek

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