SERVICE & ADJUSTMENTS
6 - 6
Issued: August 2003RT700 Series
INSPECTION AND SEAL REPLACEMENT
(continued)
2. The “spool” should be carefully washed in solvent or
diesel fuel. The seals and “O” rings should not be
removed from the spool unless they show signs of wear
or damage. NOTE: If the seal is removed for any reason,
it should be replaced since removal will almost always
damage it beyond use.
When installing a new seal and ring, it must be “walked” into
place past other seals and oil grooves and then into its own
groove in the same manner that the bead of a tire is “walked”
into the wheel rim. The spool should be well oiled to aid in
this assembly. Best results can be achieved if the spool, with
the seals mounted on the end, is allowed to sit overnight.
This gives the seals a chance to adjust to normal size.
REASSEMBLY
1. The top and bottom “O” rings and back-up washers can
be replaced without removing the spool. Removing the
top cover exposes the top “O” ring. The spool will drop
out of the case, exposing the bottom “O” ring.
UPON REASSEMBLY, INSTALL THE UPPER “O” RING
AND BACK-UP RING AFTER THE SPOOL IS IN THE
CASE. THIS WILL PREVENT ANY DAMAGE WHICH
MIGHT RESULT FROM SLIDING PAST PORT OPEN-
INGS.
2. The rotary manifold should be reassembled using a gen-
erous coat of oil on the case ID and spool OD. Gener-
ally, reassembly is most successful by placing the case
in a vertical position and inserting the spool into the
case. Each seal and wear ring should be compressed by
hand to initially enter the case bore. With the spool fully
inserted into the case, the assembly may be “up-ended”
to replace the end plate.
3. Ports should be properly protected, capped, and, prefera-
bly, oil filled without pressure.
NOTE: If the rotary manifold is oil filled and plugged,
ample air space should be allowed for the expan-
sion of oil due to temperature changes.
IT IS IMPORTANT THAT THE SPOOL FLOATS
FREELY WITH THE CASE TO PREVENT WEAR AND
LEAKAGE. THE SPOOL IS HELD STATIONARY WITH
RESPECT TO THE LOWER BY A RESTRAINING
BRACKET DESIGNED TO ALLOW FOR SOME ECCEN-
TRICITY. THE ROTARY MANIFOLD SHOULD BE
SHIMMED AT THE MOUNTING EARS AS NECES-
SARY TO INSURE CONCENTRIC ROTATION.
ROTATE THE MACHINE WHILE VISUALLY CHECK-
ING THE ALIGNMENT. THE BRACKET MUST NOT
BIND DURING ROTATION.
ROTARY MANIFOLD
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