10
Section VI - Overhaul
A. Disassembly
CAUTION
Before removing a unit to be serviced, be sure it is
not under pressure.
1. General - Use a puller to remove shaft gears or pulleys
to prevent damage to the shaft and bearings.
During disassembly, pay special attention to identifi-
cation of parts for proper reassembly. Refer to Figure 5 for
identification of parts in the following discussion.
2. Cover End - Clamp the pump mounting flange in a
vise. Be certain to used protective jaws.
a. VT16 Reservoir - Remove the tank cover screw,
lockwasher, washer, guide and guide gasket. Lift off the tank
cover and gasket and remove the tank screws, tank, gaskets
and spacers.
b. VT17 Manifold - Remove the manifold screws and
manifold and lift off the gaskets and spacers. The remaining
disassembly is the same for both VT16 and VT17 models.
c. Remove the cover screws and separate the cover
from the pump. Remove the control valve sub-assembly and
spring and the cover O-Ring.
NOTE
Control valve sub-assemblies are preset and tested
by Vickers and should not be disassembled. If any
part is defective, the complete sub-assembly should
be replaced.
d. Remove the pressure plate. Note the position of
the pump ring for reassembly. Pull out the ring locating pins
and remove the ring. Remove the vanes from the rotor slots
and slide the rotor off the driveshaft. Remove the body
O-Ring.
3. Shaft End - Remove the driveshaft key. Remove the
bearing retaining snapring and gently tap the splined end of
the shaft to remove the shaft and the outboard bearing. Sup-
port the outboard bearing inner race in an arbor press and
press out the shaft. Remove the seal from the body with a
hooked tool. Remove the inboard bearing from the shaft end
of the body with a bearing puller or by tapping it out from the
cover end.
Figure 5.
Screw
Lockwasher
Washer
Guide
Screw
(Torque to 42-48
inch pounds)
Cover
Gasket
Gasket
Tank
Spacer
Gasket
Screw (Torque to
25-30 foot pounds)
Control Valve
Sub-assemby
Spring
Pressure Plate
Ring
Vane
O-Ring
Body
Bearing
Shaft
Snapring
Bearing
Gasket
Spacer
Key
Seal
Rotor
Pin
O-Ring
Screw
(Torque to 42-48
inch pounds)
Manifold
