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 TM 55-1905-223-24-5
NOTE
Some elements have two index marks. They can have an "O" on the tube end plate (FIGURE 3-6) or notch cut
into the inside diameter of the rim (FIGURE 3-7) . Use the notch to align the element in the housing.
c. Using a valve spring compressor, compress helical compression spring (11, FIGURE 3-4) to 1.820
inches (46.23 mm). The force required must be between 22 and 26 pounds. Replace if necessary.
d.
Install valve disk (10) and helical compression spring (11) and secure with retainer plug (9).
e. Apply a coat of clean lubricating oil to new preformed packing (2). Use cooler "O" ring mandrel (ST-
1218 for 5.0 inch element diameter or ST-1223 for 4.0 inch element diameter) to push the preformed packing
(2) into the housing. Hit the mandrel with a plastic hammer until the mandrel is against the element and
housing.
NOTE
The packing must be installed less than 1 hour after the oil is applied.
f.
Install retaining ring (1). Ensure that the part number on the ring faces out.
g. Install a new gasket (13) and the cover (14) to the housing (12). Tighten the assembled washer screws
(15) to 30 to 35 ft-lb (40.06 to 47.4 N ) torque.
m
h. Slide the housing to the edge of the work bench until you can hold the element in position with your
hand. Ensure that the element does not move in the housing. Place the housing with the cover end down onto
the workbench.
i.
Repeat Steps (d), (e), and (f) to install the packing (4, FIGURE 3-4) and retaining ring (1).
j. Install a new gasket (8) and the support (5) to the housing (12). Tighten the hexagon capscrews (7)
and lockwashers (6) to 30 to 35 ft-lb (40.6 to 47.4 N ) torque.
m
k.
Install any pipe plugs that were removed.
Tighten the 1/4 inch pipe plug to 25 ft-lb (33.8 N ) torque.
l.
m
Tighten the 1/8 inch pipe plug to 7 ft-lb (9.4 N ) torque.
m.
m
n. Install the plunger (2, FIGURE 3-3), compression spring (3), spacer (4), and machine thread plug (5)
into the support housing (1) and tighten the plug to 20 ft-lb torque.
3-16
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