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TB 9-2300-378-14
(a) Remove air cleaner filter element (para. 3-2).
(b) Seal elbow outlet with clean rags and close access door.
NOTE
If vehicle is not equipped with a filter clog indicator and
shield, go to step (g). If the vehicle is equipped with early
model restriction indicator and shield, go to step (c).
(c) Remove restriction indicator (TM-20).
(d) Using a hacksaw, cut shield from elbow at four joining places (view A).
(e) Remove chain with plug.
NOTE
Retain chain and plug for installation on late model shield.
(f) Go to step (g).
(g) Using a scribe and 6 inch steel rule, inscribe lines as shown (view B).
(h) Using a center punch and ball peen hammer, punch center of two lines.
NOTE
Use cutting oil when drilling.
(i) Using 1/8 inch drill bit, drill pilot hole.
(j) Using "R" drill bit, drill through outlet elbow.
NOTE
Use cutting oil to reduce thread spalling and top breakage.
(k) Using 1/8 - 27 NPTF tap, thread hole.
(l) Using rags and dry cleaning solvent, clean oil from surface.
(m) Go to step (n).
(n) Assemble shield holding fixture (view C).
(o) Position shield and holding fixture (view D) on elbow so that shield is
centered over hole and bracket points toward the center of vehicle (view E).
(p) Using a 1/2 inch box or open end wrench, tighten down nut on threaded bar so
flat plate will hold shield in place (view F).
(q) Using arc welding machine with welding electrode, weld shield in place in
accordance with TM 9-237.
(r) Remove shield holding fixture.
(s) Install plug in elbow hole and crimp chain to hole in shield (view G).
4-12

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