35
35
EATON
Heavy-Duty Series 2 Hydrostatic Pumps Repair E-PUPI-TI004-E April 2004
Piston
Thrust Plate
Shoe Retainer
Plate
Piston Shoe
Retaining Strap
Retaining Cap Screw
Washer
Spacer
Max. Clearance ( C ) .008
A – B = C
Bronze Side
Faces Swashplate
Swashplate
10.Apply a small amount
of petroleum jelly on
the pin pivots to help
to hold them upright.
Install the two
clocking links into the
pump housing.
Lubricate and install the two swashplate bearings
into the pump housing by aligning the hole in the
side of the bearings with clocking links.
11. Before proceeding further, the fixed clearance
must be checked. The preset fixed clearance is
the clearance between the piston shoe face
and thrust plate. The formula for this clear-
ance is: Dimension A minus Dimension B
equals Dimension C. Dimension C must not
exceed .008 inches.
11a. Measure the height
of the retaining strap
spacer (dimension A)
using a micro meter
of dial vernier
calipers.
11b. Lubricate and
reassemble the
rotating group.
11c. Measure the com-
bined thickness of
the piston shoes and
retainer (dimension
B). The difference
between dimension
A and dimension B
is the fixed clearance
(dimension C).
The fixed clearance must not exceed .008 inches.
Whenever the fixed clearance exceeds .008 inches, the
piston/shoe assemblies should be reevaluated.
12. Position the swash-
plate on the support
base. Lubricate the
thrust plate and install
it on the swashplate.
Install the two
spacers, strap,
washers and retaining
screws.
DO NOT
tighten the
two retaining screws.
IMPORTANT:
The
bronze side of the
strap must face the
swashplate.
13. Carefully install the
swashplate on the
rotating group.
9. Lubricate and install
the two bearing races
into the pump hous-
ing on the locating
pins with the grooved
side of the races
toward the center of
the pump housing.
Swashplate Bearing Installation
Rotating Group and Swashplate Installation
Assembly
