Eaton Vickers 2520V-20-282 Series User manual

I–3155–SRevised 07-01-86
Quiet Intra-Vane Type Double Pumps
2520V, 3520V, 3525V, 4520V, 4525V & 4535V
Series -20 Design 282/283 Suffix
Overhaul Manual Vickers®
Vane Pumps

2
Table of Contents
Section Page
I. Introduction
A. Purpose of Manual 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B. General Information 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
II. Description
A. General 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
III. Principles of Operation
A. General 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IV. Installation and Operating Instructions
A. Installation Drawings 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B. Mounting and Drive Connections 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C. Shaft Rotation 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D. Piping and Tubing 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E. Hydraulic Fluid Recommendations 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F. Sound Levels 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G. Overload Protection 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H. Start-Up 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V. Service and Maintenance
A. Circuit Inspection 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B. Adding Fluid to the System 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C. Adjustments 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D. Lubrication 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E. Replacement Parts 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F. Product Life 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G. Troubleshooting 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VI. Overhaul
A. Service Tools 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B. Unit Removal 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C. Disassembly 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D. Cleaning 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E. Inspection, Repair and Replacement 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F. Assembly 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VII. Start-Up and Test
A. Start-Up 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B. Test 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Section I – Introduction
A. Purpose of Manual
This manual describes operational characteristics and over-
haul information for fixed and variable delivery inline piston
type pumps and motors. The information contained herein
pertains to the latest design series.
B. General Information
Related Publications –Service parts information and instal-
lation dimensions are not contained in this manual. The parts
catalogs and installation drawings listed in Table 1 are avail-
able from Vickers.
Model Parts Drawing Installation Drawing
2520V I-3186-S 504000
3520V I-3180-S 504300
3525V I-3187-S 504500
4520V I-3182-S 504600
4525V I-3188-S 504800
4535V I-3176-S 505000
Table 1. Parts and Installation drawings
Model Codes –Variations within each basic model series are
covered in the model code. Table 2 is a breakdown of the model
codes covering these units. the model code will be stamped into
the cover nameplate. If an older design unit is being updated to
the new 282/283 design, stamp the new design number on the
nameplate. Inquiries should always include the complete unit
model code number as stamped on the nameplate.
Model Code
5 6 78 9 10 11 121 2 3 4
1Special seals
Mineral and fire resistant fluids
2Pump series
2520 4520
3520 4525
3525 4535
3Quiet intra-vane type
4SAE delivery USgpm – shaft end
2520V –12, 14, 17, 21
3520V –25, 30, 35, 38
3525V –25, 30, 35, 38
4520V –42, 50, 60
4525V –42, 50, 60
4535V –42, 50, 60
5Port connections
A–SAE 4 bolt flange
B–SAE straight thread at #2 outlet port
6SAE delivery USgpm – cover end
1200 RPM at 100 PSI
2520V –2, 5, 8, 11, 12, 14
3520V –2, 5, 8, 11, 12, 14
3525V –12, 14, 17, 21
4520V –2, 5, 8, 11, 12, 14
4525V –12, 14, 17, 21
4535V –25, 30, 35, 38
7Shaft type
1–Straight with square key
(standard, all models)
86 –Straight with square key (heavy
duty, all models except 2520V)
8#1 Outlet port position
9#2 Outlet port position
10 Design
11 Rotation (viewed from shaft end)
L–Left hand
Omit –Right hand
12 Suffix – Industrial design
2–SAE 2 bolt mounting
3–Foot mounting
Table 2. Model code breakdown

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Section II –Description
A. General
The double intra-vane pump with a 282/283 suffix is
designed to operate at reduced noise levels, but still
maintain the same reliability, operating characteristics and
service advantages of previous models.
All sound reduction in the 282/283 series pump is
accomplished within the cartridge kit. The ring, vanes, rotor
and plate have been redesigned. The pump housing remains
unchanged, thus, existing systems may be upgraded by
simply replacing the cartridge kit. Figure 1 shows the basic
282/283 cartridge kit. Note that 12 vanes are assembled into
the machined rotor slots. Previous designed models use 10
vanes. Figure 1. -282/-283 basic cartridge kit parts
Section III –Principles of Operation
A. General
The operating principle of a vane pump is illustrated in
Figure 2. A slotted rotor is splined to the drive shaft and
turns inside a cam ring. Vanes are fitted to the rotor slots and
follow the inner surface of the cam ring as the rotor turns.
Centrifugal force and pressure under the vanes hold them
out against the cam ring. Pumping chambers are formed
between the vanes and the cam ring and are enclosed by
the two end plates.
The 282/283 series pumps are of a balanced intra-vane
design (Figure 2). Outlet pressure is constantly applied to
the small intra-vane area of the vane. As the pump vane
rotates through the high and low quadrants, outlet pressure
is alternately applied to the rest of the under vane area. This
varying pressure under the vane reduces wear and
increases pump efficiency.
Pump delivery can be changed by changing the ring or
installing a new cartridge kit. Table 2 shows available
delivery options. Cartridge kit part numbers are tabulated in
the parts and service drawings (Table 1).
Figure 2. Vane Pump Operation
Outlet
Low
Pressure
Quadrant
High
Pressure
Quadrant
System
Pressure
Rotation
Inlet
Rotation
Inlet or
Outlet
Pressure
Continuous
Outlet
Pressure
Outlet support plate
feeds full load
pressure to
intra-vane area at
all times.
Holes in rotor segments
feed load pressure under
full vane area in pressure
quadrant and inlet pressure
under vane area in inlet
quadrants.

5
Section IV –Installation and Operating Instructions
A. Installation Drawings
The installation drawings listed in Table 1 show operating
characteristics, installation dimensions and port locations.
B. Mounting and Drive Connections
CAUTION
Pump shafts are designed to be installed in
couplings with a slip fit. Pounding can injure the
bearings. Shaft tolerances are shown on the
installation drawing (Table 1).
1. Direct Mounting –A pilot on the pump mounting
flange (Figure 3) assures correct mounting and shaft
alignment. Make sure the pilot is firmly seated in the
accessory pad of the power source. Care should be
exercised in tightening the mounting screws to prevent
misalignment.
2. Indirect drive is not recommended for these pumps
without Vickers engineering approval.
Pilot
Flange
Figure 3. Mounting flange and pilot
C. Shaft Rotation
Pumps are assembled for either right hand (clockwise) or left
hand (counterclockwise) shaft rotation as viewed from the
shaft end.
CAUTION
Never drive a pump in the wrong direction of
rotation. Seizure will result, necessitating
expensive repairs.
D. Piping and Tubing
1. All pipes and tubing must be thoroughly cleaned
before installation. Recommended methods of cleaning are
sand blasting, wire brushing, pickling and power flushing
with clean solvent to remove loose particles.
NOTE
For information on pickling, refer to instruction
sheet 1221-S.
2. To minimize flow resistance and the possibility of
leakage, only as many fittings and connections as are
necessary for proper installation should be used.
3. The number of bends in tubing should be kept to a
minimum to prevent excessive turbulence and friction of oil
flow. Tubing must not be bent too sharply. The
recommended minimum radius for bends is three times the
inside diameter of the tube.
E. Hydraulic Fluid Recommendations
General Data
Fluid in a hydraulic system performs the dual function of
lubrication and transmission of power. It constitutes a vital
factor in a hydraulic system and careful selection of it should
be made with the assistance of a reputable supplier. Proper
selection of fluid assures satisfactory life and operation of
system components with particular emphasis on hydraulic
pumps. Any fluid selected for use with pumps is acceptable
for use with valves or motors.
Data sheet I-286 for fluid selection is available from Vickers
Technical Publications, Troy, Michigan 48084.
Fluid recommendations noted in the data sheet are based on
our experience in industry as a hydraulic component
manufacturer. Where special considerations indicate a need
to depart from the recommended fluids or operating
conditions, see your Vickers sales engineer.
Cleanliness
Thorough precautions should always be observed to insure
that hydraulic system is clean.
1. Clean (flush) entire new system to remove paint,
metal chips, welding shot, etc.
2. Filter each change of fluid to prevent introduction of
contaminants into the system.
3. Provide continuous filtration of fluid to remove sludge
and products of wear and corrosion generated during the life
of the system.
4. Provide continuous protection of system from entry of
airborne contamination by sealing the system and/or by
proper filtration of the air.
5. During usage, proper fluid filling and servicing of
filters, breathers, reservoirs, etc., cannot be over
emphasized.
6. Thorough precautions should be taken by proper
system and reservoir design to insure that aeration of the
fluid will be kept to a minimum.

6
F. Sound Levels
Although system noise levels can be reduced by modifying
pump design, fluid conditions also play a major part in
reducing system noise levels.
Some of the major factors affecting the fluid conditions that
cause the loudest noises in a hydraulic system are:
1. Very high viscosities at low start-up temperatures can
cause pump noise due to cavitation.
2. Running with a moderately high viscosity fluid will
impede the release of entrained air. The fluid will not be
completely purged of such air in the time it remains in the
reservoir before recycling through the system.
3. Aerated fluid can be caused by ingestion of air
through the pipe joints of inlet lines, high velocity discharge
lines, cylinder rod packings or by fluid discharging above the
fluid level in the reservoir. Air in the fluid causes a noise
similar to cavitation.
G. Overload Protection
Relief valve limit pressure in the system to a prescribed
maximum and protect components from excessive pressure.
The setting of the relief valve depends on the work
requirements of the system.
H. Start-Up
With a minimum drive speed of 600 RPM, a pump should
prime almost immediately if provision is made to initially
purge the air from the system.
Failure to prime within a reasonable time may result in
damage due to lack of lubrication. The pump housing must
be filled with fluid and inlet lines must be tight and free from
air leaks. It may be necessary to crack a fitting on the outlet
side of the pump to purge air trapped in the system.
Section V –Service and Maintenance
A. Circuit Inspection
Periodic inspection of the fluid condition and tube or pipe line
connections can save time-consuming breakdowns and
unnecessary parts replacement. the following should be
checked regularly:
1. All hydraulic connections must be kept tight. A loose
connection in a pressure line will permit the fluid to leak out.
If the fluid level becomes so low as to uncover the inlet pipe
opening in the reservoir, extensive damage to the pump can
result. In suction or return lines, loose connections permit air
to be drawn into the system resulting in noisy and/or erratic
operation.
2. Clean fluid is the best insurance for long service life.
Therefore, the reservoir should be checked periodically for
dirt or other contaminants. If the fluid becomes contami-
nated, the system should be drained and the reservoir
cleaned before new fluid is added.
3. Filter elements also should be checked and replaced
periodically. A clogged filter element results in a higher
pressure drop. This can force particles through the filter
which would ordinarily be trapped, or can cause the by-pass
to open, resulting in a partial or complete loss of filtration.
4. Air bubbles in the reservoir can ruin the pump and
other components. If bubbles are seen, locate the source of
the air and seal the leak.
5. A pump which is running excessively hot or noisy is a
potential failure. Should a pump become noisy or over-
heated, the machine should be shut down immediately and
the cause of improper operation corrected.
B. Adding Fluid to the System
When hydraulic fluid is added to replenish the system, it
should always be poured through a clean wire screen (200
mesh or finer) or preferably pumped through a 10 micron
(absolute) filter.
It is important that the fluid be clean and free of any sub-
stance which could cause improper operation or wear of the
pump or other hydraulic units. Therefore, the use of cloth to
strain the fluid should be avoided to prevent lint getting into
the system.
C. Adjustments
No periodic adjustments are required, other than to maintain
proper shaft alignment with the driving medium.
D. Lubrication
Internal lubrication is provided by the fluid in the system.
Lubrication of the shaft coupling should be as specified by
their manufacturers. Coat shaft splines with a dry lubricant
(Molycoat or equivalent) to prevent wear.
E. Replacement Parts
Reliable operation throughout the specified operating range
is assured only if genuine Vickers parts are used. Sophisti-
cated design processes and material are used in the
manufacture of our parts.

7
Substitutes may result in early failure. Part numbers are
shown in the parts drawings listed in Table 1.
Repair Kits –Commonly replaced parts are usually provided
in the form of a kit (Figure 4). It is recommended that all such
parts be replaced with the kit when a unit is overhauled.
CAUTION
Individual cartridge parts ARE NOT
interchangeable with similar parts of previous
design models. Complete cartridge kits ARE
interchangeable with previous designs.
F. Product Life
The longevity of these products is dependent upon envi-
ronment, duty cycle, operating parameters and system
cleanliness. Since these parameters vary from applica-
tion to application, the ultimate user must determine and
establish the periodic maintenance required to maximize
life and detect potential component failure.
Rotor, vane and
intra-vane
assembled
inside ring
Inlet
Support
Plate
Screw
Bushing Location Pin
Ring
Outlet
Support
Plate
Sealing Ring
Back-up
Ring
and O-ring
Figure 4. Pre-assembled cartridge kit
G. Troubleshooting
Table 3 lists the common difficulties experienced with vane
pumps and hydraulic systems. It indicates probable causes
and remedies for each of the troubles listed.
TROUBLE PROBABLE CAUSE REMEDY
Excessive noise in pump. Low oil level in reservoir. Fill reservoir to proper level with
recommended fluid.
Air in system. Open reservoir cap and operate system
until purged.
Bleed hydraulic lines at highest point
down stream of pump while system is
under pressure.
Vacuum condition. Check inlet (suction) line and fittings for
air leaks.
Oil too thick. Be certain correct type of oil is used in
system. Warm up pump in cold weather
until noise disappears.
Damaged or missing pump seals at
mating surfaces. Locate and replace damaged or missing seals.
Cartridge kit not assembled properly. Reassemble cartridge kit.
Pump inlet/outlet lines reversed. Replumb lines to proper port
connections.
Pump overheating. Internal leakage. If excessive internal leakage exists,
return to shop for complete overhaul.
Heat exchanger not functioning. Locate trouble and repair or replace.
System not developing pressure. Relief valve open. Repair or replace.
yg
Loss of fluid internally (slippage). Return to shop for evaluation and repair.
Cartridge kit not assembled properly. Reassemble kit.
Cartridge kit assembled for opposite
rotation. Reassemble kit to proper rotation.
Pump inlet/outlet lines reversed. Replumb lines to proper port
connections.
Disconnected or broken drive
mechanism. Locate and repair.
Loss of fluid. Ruptured hydraulic lines. Locate and repair.
Leaking or missing seals. Locate and repair.
Table 3. Troubleshooting Chart

8
Section VI –Overhaul
A. Service Tools
Standard Tools
1. One torque wrench with short extension and sockets.
Select appropriate torque wrench according to cover screw
specifications noted in Tables 4 and 5.
2. One medium size screw driver.
3. One small ball peen hammer.
4. A center punch.
5. One internal retaining ring pliers.
6. Hydraulic oil lubricant or equivalent (SAE 10W motor oil).
Special Tools
A shaft seal driver (Figure 5) is the only special tool required
for overhaul. NOTE
In addition to the above tool, an arbor press may be
required to service the shaft bearing.
A
B
C
D
Note: All Dimensions are in inches
1/16 15_
0.125
0.500
E
4.00
Break sharp
edges and polish
NOTE: All dimensions in inches.
Dimension
Model AB C D E
2520V 2.045
".001 1.683 ".001 1.468 ".001 1.343
".001 0.250
3520V
3525V 2.832 ".001 1.997 ".001 1.758 ".001 1.687
".001 0.250
4520V
4525V
4535V 3.145
".001 2.371 ".001 2.281 ".001 1.906
".001 .437
Figure 5. Shaft seal driver
B. Unit Removal
WARNING
Turn off all electrical power and relieve hydraulic
pressure. Lower all vertical cylinders. Block any
load whose movement could generate pressure.
1. Close off hydraulic oil source to pump inlet if an
overhead reservoir is used.
2. Remove the unit from the system.
3. Cap all system and unit openings to prevent entry of
dirt or moisture.
C. Disassembly
The inlet numbers of Figure 8 are in disassembly order se-
quence. NOTE
4535V models are slightly different from the models
shown in Figure 8. Screws (4) are longer and fasten
cover (5), inlet housing (19) and body (38) together.
Screws (18) are omitted.
1. Thoroughly clean pump exterior.
2. Use a prick punch and mark position of cover (5) and
body (38) with respect to inlet housing (19).
3. Remove two screws (1) and remove the pump from
mounting flange (2).
4. Remove key (3) from shaft (34).
5. Remove the four screws (4) from cover (5), then,
remove cover.
6. Remove seals (7, 8, 9 and 10) from cartridge kit (6)
and discard.
7. Remove cartridge kit (6) from inlet housing (19) and
disassemble according to item number sequence.
8. Remove four screws (18) from housing (19) and then
remove housing.
9. Pull cartridge kit (20) from body (38) and disassembly
in item number sequence.
10. Pry under coil and remove spirolox ring (31) from
body (Figure 6).
Spirolox Ring (31)
Hooked Tool
Figure 6. Removing spirolox ring

9
11. Pull the shaft group (items 32 through 34) from body
(38). If bearing 933) or shaft (34) need replacement, remove
retaining ring (32) with retaining ring pliers. Remove bearing
(33) from shaft (34) by using an arbor press. Apply pressure
to the inner race when removing bearing.
12. Remove washer (35) and “O”ring (36) from body (38).
13. Drive shaft seal (37) out of mounting end of body.
D. Cleaning
All parts must be thoroughly cleaned and kept clean during
inspection and assembly. contamination of the unit will cause
excessive wear, leakage and decreased service life. Use a
commercial solvent which is compatible with the system
fluid. Thoroughly clean all parts. Drying parts with com-
pressed air after cleaning is not recommended, unless the
air is completely filtered to remove water and contamination.
E. Inspection, Repair and Replacement
Check all internal passages. Make sure they are clean and
unobstructed. Examine all mating surfaces for nicks and
burrs. check locating pins and holes for wear and burrs.
Check the condition of threaded parts and threaded holes.
Check all snap ring recesses. Minor burrs can be removed
with an India stone. Replace any part which shows wear or
damage. The following parts are subject to special attention.
1. Cartridge kits (6 and 20). In order to obtain maximum
overhaul life of the pump, a complete cartridge kit should be
installed if wear or scoring is noticed during the following
inspection.
a. Inspect the mating surfaces of the rotors (15 and
28), outlet support plates (17 and 30) and inlet support
plates (12 and 25) for wear and/or scoring.
b. Inspect the vanes and inserts (16 and 29) for
burrs, wear and play in the slots of the rotors (15 and 28).
Remove minor burrs with an India stone.
c. Inspect bushing for wear and scoring (Figure 4).
2. Check the bearing (33) for wear, looseness and pitted
or cracked races.
3. Inspect the seal and busing mating surfaces on the
shaft for scoring and wear. Replace the shaft if marks cannot
be removed by light polishing.
4. Remove burrs from outer edge of ring (17). Place
rotor (15) and ring (27) on a flat surface. Measure ring/rotor
clearance with a dial indicator. Ring/rotor clearance are
noted in Table 4. Model Min. Clearance
limit in inches
**20V 0.0007
**25V 0.0012
**35V 0.0015
25**V 0.0012
35**V 0.0015
45**V 0.0016
Table 4. Minimum allowable ring rotor clearance
F. Assembly
Refer to the parts and service drawing listed in Table 1 for
replacement parts. Always replace old seals with new seals
when overhauling a unit. If a cartridge kit needs replace-
ment, new cartridge seals are included as part of the kit.
Apply a light film of hydraulic fluid to all component parts to
facilitate assembly and provide initial lubrication. Install parts
in the reverse order of disassembly (Figure 8).
1. Position seal (37) garter spring toward the inside of
body (38) and press in place with shaft seal driver (Figure 5).
2. Install washer (35) into body (38).
3. If required, press bearing (33) on shaft (34) and
secure with retaining ring (32). Use an arbor press for this
operation and apply force to the inner race area.
4. Check the keyway end of shaft to make certain it is
free from nicks and burrs. A small nick or burr can damage
the shaft seal during installation. Coat the keyway portion of
the shaft with hydraulic fluid. Carefully install the shaft group
(items 32 through 34) through the seal and into body (38).
Spread spirolox ring (31) and feed it into the groove located
behind the bearing. This will secure the shaft group within
body (38).
5. Install sealing ring (23) into body (38).
6. If cartridge kit (20) is replaced with a new kit, install
the kit into body (38). If cartridge kit requires assembly,
assemble in reverse order of disassembly (Figure 8). During
assembly, note the following precautions.
a. Make sure the arrows on rotor (28) and ring (27)
are in the direction of pump rotation.
b. Make certain that sharp edges of vanes (29) lead
in the direction of rotation (Figure 7).
Inlet Direction of
rotation
Rotor
Sharp edges
lead direction
of rotation Vane Ring
Figure 7. Positioning vanes in rotor

10
c. Make sure “O”ring (22) and back-up ring (21) are
assembled correctly. Position as shown in Figure 8. Apply a
small amount of system fluid to screws (24) and thread
screws into cartridge kit. Install cartridge kit 920) into body
(38).
7. Install “O”ring (36) over cartridge kit (20) and into
“O”ring groove of body (38).
8. Line up the two cartridge kit pins (26) with the holes in
housing (19) and then install the housing. Position the
housing according to punch marks made during step C.2 of
Disassembly procedure. Attach housing to the body with four
screws (18). Torque the screws to specifications noted in
Table 4.
Torque Specification
Model N.m lb.ft.
2520V 48–55 65–75
3520V 102–118 140–160
3525V 102–118 140–160
4520V 188–203 255–275
4525V 188–203 255–275
4535V – –
Table 4. Torque specifications for screw (18)
9. If cartridge kit (6) is replaced with a new kit, line up
pins (13) with holes in housing (19) and install kit into
housing. If cartridge kit requires assembly, assemble in
reverse order of disassembly. During assembly, note the
following precautions.
a. Make sure the rotation arrows on the rotor (15)
and ring (14) are in direction of pump rotation.
b. Be certain the sharp edges of vanes (16) lead in
direction of pump rotation.
c. Make sure “O”ring (9) and back-up ring (8) are
assembled in the correct position (Figure 8).
NOTE
Cartridge kit (6) is assembled into housing (19) in
the reverse manner of cartridge kit (20). Make sure
the rotation arrow of the ring points in direction of
rotation.
d. Apply a small amount of hydraulic fluid to screws
(11) and thread screws into cartridge kit.
10. Install sealing ring (10) into cover (5).
11. Install “O”ring (7) over cartridge kit (6) against the
housing face.
12. Position cover (5) over cartridge kit (6) according to
the prick marks made during step C.2 of disassembly
procedures. Install cover (5) and secure with screws (4).
Torque screws (4) to specifications noted in Table 5.
Model N.m lb.ft.
2520V 54–68 40–50
3520V 54–68 40–50
3525V 88–102 65–75
4520V 54–68 40–50
4525V 88–102 65–75
4535V 188–203 255–275
Table 5. Torque specifications for screw (4)
13. Install key (3) into groove on shaft (34).
14. Place pump into mounting bracket (2) and secure
with two screws (1).
Section VII –Start-Up and Test
A. Start-Up
Install the unit into the system. Make sure that the drive shaft
is aligned properly, all connections are tight and the hydraulic
oil source is open to pump inlet. If an overhead reservoir is
used, purge air from inlet line.
The pump should prime almost immediately with a minimum
drive speed of 600 RPM. Intermittently operate (jog) the
pump until it primes. It may be necessary to loosen the outlet
fitting temporarily to purge trapped air. Failure of the pump to
prime in a short period of time indicates incorrect assembly
or restricted flow from the reservoir.
B. Test
Use your hydraulic system to test the unit. Refer to the
installation drawings listed in Table 1 for recommended
speeds and pressures. If more precise testing is desired,
consult your Vickers sales engineering office.

Figure 8. Exploded view and disassembly sequence 11
7
14
8910
12 13
16 11
6
45
17 15 18 19
26 24 25 27 28 29 30 23 22 21 31 32 33
20
34
3
35 37 36 138 2
Item Description Qty
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Screw
Mounting Bracket
Key
Screw
Cover
Cartridge Kit (items 7-17)
“O”Ring
Back-up Ring
“O”Ring
Sealing Ring
Screw
Inlet Support Plate
Pin
Ring
Rotor
Vanes & Intra-vanes
Outlet Support Plate
Screw
Housing
2
1
1
4
1
1
1
1
1
1
2
1
2
1
1
12
1
4
1
Item Description Qty
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
Cartridge Kit (items 21-30)
Back-up Ring
“O”Ring
Sealing Ring
Screw
Inlet Support Plate
Pin
Ring
Rotor
Vanes & Intra-vanes
Outlet Support Plate
Spirolox Ring
Retaining Ring
Bearing
Shaft
Washer
“O”Ring
Shaft Seal
Body
1
1
12
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

12 Printed in U.S.A.
Form No. 00-000 Copyright Eaton Corporation, 0000
All rights reserved.
Printed in U.S.A
Eaton Hydraulics
15151 ighway 5
Eden Prairie, MN 55344
Telephone: [phone]
Fax: [phone]
www.eatonhydraulics.com
46 New Lane, avant
ampshire PO9 2NB
England
Telephone: [phone]
Fax: [phone]