TM 5-3810-307-24-1-2
d.
Draw two diagonal lines across square part of pipe plug - P/N 6443100005 to mark
center and create indent in center using a punch.
e.
Pre-drill a 0.25" hole in center of pipe plug - P/N 6443100005 to be used as a guide for
drilling a new 3.0" hole in hydraulic reservoir with a hole saw.
f.
Drill out the existing tank flange to 3.0" diameter using 3" hole saw. This hole will be
used for a new 2.0" NPT coupler - P/N A-3228HD. Discard old tank flange and pipe plug
- P/N 6443100005.
g.
Determine which doubler plate - P/N 6705170879 or 6705170884 to use and the proper
dimensions for two new holes on hydraulic reservoir by placing each doubler plate on
edge of reservoir as shown in Figures J-5 and J-6. The proper doubler plate will fit
cleanly on radius of hydraulic reservoir without any gaps between the plate and the
hydraulic reservoir.
CAUTION
If doubler plate - P/N 6705170879 is to be used, refer to Figure J-5 for the
proper dimensions. If doubler plate - P/N 6705170884 is to be used, refer
to Figure J-6.
h.
Mark the centers for the 2.12" and second 3.0" diameter hole in accordance with the
appropriate dimensions shown on Figure J-5 or J-6.
i.
Use a punch to create an indent in the centers of the 2.12" and 3.0" diameter holes.
j.
Pre-drill 0.25" holes to be used as guides for drilling the holes in hydraulic reservoir with
hole saws.
k.
Using a 2.12" (2-1/8") hole saw, drill the hole for the 1.25" NPT tank flange - P/N
7450000030.
l.
Using a 3" hole saw, drill the hole for the second 2.0" NPT coupler - P/N A-3228HD.
m.
Clean edges and remove paint from the area around the three new holes and the area
where the appropriate doubler plate - P/N 6705170879 or 6705170884 will be welded in
place.
n.
Insert 1.25" NPT tank flange - P/N 7450000030 in 2.12" diameter hole, align, and weld
1.25" NPT tank flange to hydraulic reservoir.
o.
Mark the outside of the two 2.0" NPT couplers - P/N A-3228HD in the middle of the
coupler body. This mark will line up with the hydraulic reservoir body to allow
approximately 1.5" of each coupler to extend outside of the hydraulic reservoir.
p.
Insert 2.0" NPT couplers - P/N A-3228HD in 3.0" diameter holes, align mark on side with
hydraulic reservoir, ensure couplers are even and level with hydraulic reservoir, and
weld couplers to hydraulic reservoir.
q.
Clean welds at 2.0" NPT couplers - P/N A-3228HD by sanding.
J-12 Change-1
