TSE DP20-4H, Owner'S Manual

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5
Model 74624 and 74644
9 Place the spring over the drive shaft and pivot onto the
spring.
10 Lubricate and place spider pilot onto pivot.
11 Lubricate and install the spider
and the piston assemblies into piston
block and onto pivot.
12 The connector
plate is flat on one
side. The flat side is
shown.
13 Lubricate and place the
connector plate onto the piston
assemblies. The flat side is
positioned against piston assemblies.
14 Install bearing race, thrust
bearing and second bearing race
onto shaft.
15 Lubricate and place thrust race
and/or races in backplate assembly.
16 Position new o-ring onto
backplate.
17 Align the holes of the backplate
to the housing. Install cap screws
and torque 20,3-24,4 N·m [15 to 18
lbf·ft].
18 Protecting the new shaft seal, install the
seal over the output shaft and into the motor
housing slightly below the counterbore face.
Position the retaining ring on top of the seal.
19 Using a seal driver or similar
tool, press the retaining ring and
shaft seal into motor housing.
20 The unit is ready to test and
reinstall.
Reassembly
Before reassembly the Eaton Model 74624 high torque axial
piston motor inspect all parts and replace if needed. New seals
should be lubricated with petroleum jelly to assure proper
installation.
Lubricate all finished part surfaces
freely with clean hydraulic fluid to
provide start-up lubrication between
the rotating parts.
1 Looking at the piston block one
end has a beveled edge around the
shaft bore as shown.
2 Install the drive shaft into the
piston block at the beveled edge end.
Note that the retaining ring on the
drive shaft must be on the beveled
side of the piston block.
3 Using the backplate as a means
of support, place the drive shaft and
piston block on the backplate with
the spline end of the drive shaft in
the up position.
4 Install the spacer and pivot on
the drive shaft.
5 Place the piston race assembly
over the drive shaft and onto pivot.
6 Place thrust bearing and race
onto piston race assembly.
7 Install the motor housing
assembly over the drive shaft.
8 Carefully retaining the
assemblies together, turn the motor
housing over and support it in the
drive shaft down position. Remove
the backplate assembly. Install the
nine pistons into the piston block.
Insert the beveled end of the pistons
into block and against the piston race
assembly. Caution: Do not install
more than one piston in the same
bore.
Reassembly
Pivot
Spacer
Piston Race
Assemble
Thrust
Bearing &
Race
Pivot
Spring
Spider Pilot