Bulletin 1531-001/USA
Pump/Motor Division
700 Series Service Procedure
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 USA
16
Section II
Motor Assembly
1. Assemble the new dust seal flat edge facing into
the flange (12).
2. Assemble the new shaft seal and place flat side
facing out over the shaft (11) to the shoulder.
Insert shaft into flange. Tap shaft end with soft
hammer to seat seal.
NOTE: With 1" diameter shafts (2970-X) thrust
bearing must now be pressed into the flange with
the copper side facing inward.
3. Position the center block (9) so the pilot port or
solenoid ports are on your right and lock in vise.
4. Place the square cut seal (3) in center block seal
gland.
5. Place commutator plate (7) on the center block (9)
with the square ring groove facing up. Align the 8
bolt holes in the plate with the 8 tapped holes in
the body (The holes will align in only one position).
Section II
Motor Assembly
Replace all seals and seal rings with new ones each
time you reassemble the motor unit. Lubricate
all seals and seal rings with oil or clean grease
before assembly.
NOTE: Individual seals and seal rings as well as
complete seal kits are available. The parts should
be available through most OEM parts distributors
or Parker distributors. (Contact your local dealer
for availability.)
NOTE: Unless otherwise indicated, do not oil or grease
parts before assembly.
Wash all parts in clean petroleum-based solvents
before assembly. Blow them dry with compressed
air. Remove any paint chips from mating surfaces
and from port an seal areas.
Since they are flammable, be
extremely careful when using any
solvent. Even a small explosion or
fire could result in injury or death.
WARNING
Wear eye protection and be sure to
comply with OSHA or other maxi-
mum air pressure requirements.
WARNING
NOTE: Do not dislodge square ring seal (3) while
positioning the commutator plate (7).
6. Insert the internal shaft through the commutator
plate and center block with the spline snap ring
groove up. Then place the counterbored (at
the splines) valve plate on the shaft with the
counterbore facing up to accept the snap ring
halves (5) in the next step.
7. Put both snap ring halves (5) into the snap ring
groove on the shaft (6). Hold the snap rings in
place with pliers while gently tapping the shaft
down, seating the snap rings into the valve plate
counterbore.
8. Place the square cut seal (3) in the commutator
plate (7) seal gland.
9. Place the inner counterbored side down on the
splines so that the semicircular roll pockets are
between the rotary valve port windows. Rotate
the shaft and align one valve plate window
perpendicular to the flat center block port face.
Keep this valve/shaft position to enable proper
timing of the motor in step 17. A properly timed
motor will help smooth out low speed operation
(i.e. 180˚ out of phase).
10. Place the outer over the inner and insert the rolls.
The rolls should not block the ports in the valve
plate. Place the check balls (8) on their seats
on the commutator plate. Assembly grease can
be used to keep the check balls in place during
assembly.
11. Place the locating ring over the inner with the
square oil return groove up and the check ball
counterbores over the check balls. Align the 8 bolt
holes with the commutator holes.
12. Alternate inserting long and short rollers between
the outer and locating ring to match up with 4
dowels on the cover.
NOTE: The difference between rolls and rollers
is that rolls have square ends and rollers have a
radius on the ends.
13. Place O-Ring (3) in cover (2) seal groove.
Assembly grease can be used to hold the O-Ring
in place during assembly.
14. Place the cover (2) so the port markings (IN-IN)
are lined up with the corresponding ports. Also
check the O-Ring (3) to verify it hasn't dropped
out.
Содержание 700 Series
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