ADAPTER INSTALLATION PROCESS
OM 0495SB-A [57]
ORB (O-RING BOSS) THREAD IDENTIFICATION & TORQUE
SAE O-rings (O-Ring Boss) are straight thread fittings that seal using an O-ring between the thread and
the wrench flats of the fitting. The O-ring seals against the machined seat on the female port.
O-ring fittings can be either adjustable or non-adjustable. Non adjustable fittings are screwed into a port
where no alignment is needed. Adjustable fittings can be oriented in a specific direction.
Fittings with O-rings offer advantages over metal-to-metal fittings. Under or over-tightening any fitting can
allow leakage, but all-metal fittings are more susceptible to leakage because they must be tightened to a
higher and narrower torque range. This makes it easier to strip threads or crack or distort fitting
components, which prevents proper sealing.
NOTE: Do not apply thread sealant (teflon tape) on the ORB threads.
Leaks can also result from vibration, thermal cycling and from loads being supported by the connection
(i.e. using the fitting in the connection to support mechanical loads).
IMPORTANT: Use the lowest torque value from the chart when wet torquing.
RECOMMENDED ASSEMBLY
ORB (O-RING) NON-ADJUSTABLE
STEP 1: Inspect all components for
damage or contamination.
STEP 2: Lubricate O-ring and threads on
fitting with the same hydraulic fluid used in the
tractor.
STEP 3: Turn fitting into port until finger tight,
then torque to the value shown in the
following table.
NOTE: Use the lowest torque value from
the chart when wet torquing.
RECOMMENDED ASSEMBLY
ORB (O-RING) ADJUSTABLE
STEP 1: Inspect all components for damage or
contamination.
STEP 2: Lubricate O-ring and threads on fitting with the
same hydraulic fluid used in the tractor.
STEP 3: Looking at fitting from the male ORB end, turn
manually the nut as far as possible from the O-ring.
STEP 4: Using wrench, turn fitting into port until the
washer touches thread nearest wrench pad.
STEP 5: Back off• fitting counterclockwise not exceeding
one revolution until it is oriented in the correct position.
STEP 6 : Place wrench on the wrench pad of fitting to
prevent fitting from turning, and torque nut to the value
shown in the above table.
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