TM 5-3810-307-24-1-2
r.
Slide appropriate doubler plate - P/N 6705170879 or 6705170884, determined in Step g.
above, over the two 2.0" NPT couplers - P/N A-3228HD and align over edge of hydraulic
reservoir. Ensure there are no gaps between the doubler plate and the hydraulic
reservoir.
s.
Weld doubler plate to the two 2.0" NPT couplers and the hydraulic reservoir.
t.
Clean inside of hydraulic reservoir by spraying a phosphate cleaner inside while draining
from the filler cap opening. Rinse with clean water and completely dry inside of reservoir
using compressed air.
u.
Reinstall any items removed in Step b above.
Hydraulic Reservoir Modification Pressure Test. (Refer To Figure J-7.) Test the crane's hydraulic
reservoir after modification as follows:
a.
If necessary, install the filler cap and return filter assembly.
b.
Using duct tape, completely cover the return filter fittings, main hydraulic pump suction
fittings, new 2.0" NPT couplers - P/N A-3228HD, and all openings (except the breather
and new 1.25" NPT tank flange - P/N 7450000030) on the hydraulic reservoir.
c.
Assemble a test fitting, as shown in Figure J-7, from a 1.25" NPT X 0.5" NPT adapter
fitting (1), a 0.5" NPT X 3/8" NPT adapter fitting (2), and a 3/8" NPT quick connect fitting
(3). Install the test fitting in the new 1.25" NPT tank flange - P/N 7450000030 on the
hydraulic reservoir.
d.
Have a second person hold a hand over the breather opening in the top of the hydraulic
reservoir and pressurize the hydraulic reservoir to approximately 7 psi (48.3 kPa) via the
test fitting connected to the new 1.25" NPT tank flange - P/N 7450000030.
NOTE
Holding a hand over the breather opening seals the hydraulic reservoir
and also acts as a pressure regulator to allow the reservoir to only
pressurize to a low level.
e.
Using soapy water, check for air leaks around all welds.
f.
Repair any welds and clean hydraulic reservoir as necessary.
g.
Remove test fitting and reinstall any components removed (including the breather).
h.
Repaint welded areas on hydraulic reservoir.
Change-1 J-15
