TM 5-3895-373-34
C.
INSTALL - Continued.
2.
INSTALL O-RING BOSS (ORB) FITTINGS.
Be careful not to damage preformed
packing when sliding over threads.
Sharp edges of thread can cut or
damage
preformed
packing.
Damaged
preformed
packing
will
cause
leakage
and
affect
performance.
a.
Straight and swivel type ORB fittings (9 and 10)
are used on the paving machine. Each
requires a preformed packing (11) to achieve a
seal. Whenever the seal is broken, the
preformed packing must be replaced.
b.
Lubricate
preformed
packing
(11)
with
petrolatum. Carefully install packing in mating
packing groove of ORB fittings (9 or 10).
c.
When installing straight type ORB fitting (9),
screw fitting into mating component (12) until
preformed packing (11) is fully seated in
mating packing seat. Tighten fitting until snug.
d.
When installing swivel type ORB swivel fitting
(10), screw fitting into mating component (13)
until preformed packing (11) just meets
packing seat of mating component. Be
careful not to dislodge preformed packing
from packing groove in fitting.
e.
Rotate
swivel
type
ORB
fitting
(10)
counterclockwise to desired alignment angle.
Tighten lock nut (14) until backup washer (15)
seats
on
machined
surface
of
mating
component (13). Tighten lock nut until snug.
f.
Connect tube or hose per step c. Check ORB
fitting for leakage during system startup. If
leaking, loosen connecting tube or hose and
tighten ORB fitting. Retighten tube or hose.
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