#4 charger guide attachment welded VS pinned

[Peter Laidler]

Here it is from the horses mouth. Nothing to do with weak bodies. They were all MANUFACTURED by being pinned in place. Early on, they were screwed in place with two 'taper-lock' screws. During the 'in inspection' process at Field and Base workshop, you'd lever a screwdriver under the bridge and if you saw an oil squeeze or felt any looseness, you'd drill a small countersink along the base line on both sides and fill the countersink with weld. Simply as a means of retaining it for good.

I've done literally hundreds on No4's and 5's ......................

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[ireload2]

Here it is from the horses mouth. Nothing to do with weak bodies. They were all MANUFACTURED by being pinned in place. Early on, they were screwed in place with two 'taper-lock' screws. During the 'in inspection' process at Field and Base workshop, you'd lever a screwdriver under the bridge and if you saw an oil squeeze or felt any looseness, you'd drill a small countersink along the base line on both sides and fill the countersink with weld. Simply as a means of retaining it for good.

I've done literally hundreds on No4's and 5's ......................

Why did the charger bridge cross pieces loosen?
What was the composition of the steel used to manufacture the #4 action bodies and what was the heat treatment cycle. How was the heat treatment verified? Were any #4 action bodies found to be cracked during maintenance and over haul and where were cracks if any found?