BOILER FRONT HEAD REPAIRS

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FIG.1 Illustrating Boiler Front Head Repairs.

1340 Book Tower Engineering Department Detroit 26, Michigan

The repair outlined in this issue is not too costly and should
grant a few years reprieve to a lot of engines that would have to
be otherwise scrapped due to corrosion and wasting away of the
lower section of the front head tube sheet and riveted flange. This
repair ellminates the costly flanging. tube and stay rod
replacement incident to full front head replacement However, we
would recommend that a competent boiler maker be employed to do
this work as, welding, riveting and caulking operations are
Involved.

To make this repair, proceed’ as follows: Either burn or
drill out the rivets in the wasted section of the front head
flange, then burn away the corroded section of the front head below
the tubes, including the wasted flange in which the rivets have
been removed. With all the metal out of the way, fit a sheet
section of bar iron in place of the flange Fig. 1. Drill the rivet
holes approximately one-eighth inch undersize and bolt the new
flange securely with machine bolts. The next step is to cut out a
piece of boiler plate Fig. No. 2, of the same thickness as the
original head. Fit this section in place behind the bar iron
flange. Next complete the welding as outlined in detail No. 1 using
an electric arc and a Fleetweld No. 5 electrode.

After all welding is completed, the riveting of the flange can
be started. Remove only one machine bolt at a time and drill and
ream each hole before riveting. The holes should be reamed
approximately one-sixteenth inch over the diameter of the rivet.
shank. On completion of this work the bonier should be filled with
water and given a hydrostatic pressure test of 1 and a quarter
times the working pressure for which the boiler was originally
designed.

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