EATON Vickers
Single, Double, Triple and Thru-drive Pumps Overhaul Service Manual V-PUVN-TS001-E October 2002
19
Section VI —
Overhaul
B. Disassembly
WARNING
Before breaking a
circuit connection,
make certain that
power is off and system
pressure has been released.
Lower all vertical cylinders,
discharge accumulators and
block any load whose movement
could generate pressure. Plug all
removed units and cap all lines
to prevent the entry of dirt into
the system.
During disassembly, pay
particular attention to
identification of the parts,
especially the cartridges, for
correct assembly. Figure 9 is an
exploded view which shows the
proper relationship of parts for
disassembly and assembly.
Refer to Figure 9 for the correct
assembled relationship of the
parts. Various steps in the
overhaul process are shown in
Figures 10 through 17.
A. General
Basic Pump.
Remove the foot
mounting and shaft key if used.
Support the pump on blocks or
clamp the body in a vise as
shown in Figure 10. If a vise is
used, use protective jaws to
avoid damage to the body and
its machined surfaces. Mark
the pump body and cover for
correct reassembly. Remove
the necessary screws to
disassemble the housing.
Remove all Housing O-Rings.
Pull and/or pry out the
cartridge(s) as shown in
Figure 11.
Remove the large spirolox ring
and pull the shaft and bearing
from the body. Drive the shaft
seals out of the body. If it is
necessary to remove the shaft
bearing, first remove the small
snap ring and then press the
shaft out of the bearing while
supporting the bearing inner
race.
The rotation of Eaton cartridge
kits can easily be changed from
clockwise to counterclockwise,
or vice versa, by following the
steps outlined below:
NOTE:
A double or triple VMQ
pump will contain cartridge kits
that mirror one another. The
rotation direction of each
kit is specific to the pump
configuration. See Table 8
for application details.
Figure 10.
Beginning disassembly
Figure 11.
Cartridge removal
Figure 12
NOTE
Complete cartridges are
available in service kits
for rebuilding these pumps.
Refer to the Series 30 VMQ
Parts catalog for part
numbers.
Cover Screw
Index marks
for assembly
reference
If vice is used,
clamp here.
C. Drive Reversal
