Eaton
®
DuraForce™
HMR Conversion Procedures
2 EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Content Page #
Table of Contents
Tools Required 2
Introduction 3
Model Code 4
Block the Case Flushing Feature
Set Up 5
Procedure to Disable the Shuttle Valve Assembly 6
Procedure to Disable the Purge Valve 8
Exchange Purge Valves
Set Up 9
Procedure to Exchange a Close Loop Purge Valve with an Close Loop Purge Valve 9
Procedure to Exchange an Open Loop Purge Valve with a Open Loop Purge Valve 9
Exchange Shuttle Valve Assemblies
Set Up 10
Disassembly Procedure 11
Assembly Procedure 12
Exchange Displacement Override Blocks
Set Up and Procedure 13
Exchange Controls
Set Up and Procedure 14
Exchanging Response Orifices
Set Up and Procedure 15
Maximum Displacement Adjustment
Set up and Procedure 17
Minimum Displacement Adjustment
Set up and Procedure 18
Adjust Crossover Relief
Set up and Procedure 19
Operational Parameters 20
Part Numbers Listing 22
Blocking the Case
Flushing Feature
• 12mm Allen wrench
• 13mm Wrench (for Closed
Loop Purge Valve)
• 17mm Wrench (for Open Loop
Purge Valve)
• Torque wrench capable of
setting 122 N-m (90 ft-lb)
• Needle-nose pliers
• Blocked Purge Valve
• Rubber Mallet (optional)
• Disabled Shuttle Spool
Exchanging Purge
Valves
• 13mm wrench
• 17mm wrench
• Torque wrench capable of
setting 15 N-m (11 ft-lb)
Exchanging Shuttle
Valve Assemblies
• 12mm Allen wrench
• Heat gun / torch
• Eaton shuttle assembly tool
• Green Loctite 648
• Torque wrench capable of 100
ft-lb (136 N-m)
Exchanging Displacement
Override Blocks
• 3mm Allen wrench
• Torque wrench capable of
setting 3.8 N-m (2.8ft-lb)
Tools Required
3EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
This manual will provide you with information and procedures
for general conversions of Eaton® DuraForce™ HMR
Regulated Variable Displacement Open and Closed Loop
Hydraulic Motors. Procedures outlined in this manual will
allow you to be more flexible with your inventory and better
service your customers. To ensure accuracy of conversion
and prevent part loss or damage, certain components
or subassemblies are disassembled, inspected, and
reassembled when removed from the motor.
Training
You have been provided information on the conversion of
DuraForce products. Proper application of the information
requires specific training and may require use of specialized
tooling and equipment. All requests for training must be
coordinated through your Eaton Account Manager. He can
also provide you price and availability of any specialized
tooling. If you choose to proceed with the conversion of the
DuraForce products absent the necessary training and/or
these specialized tools, you do so at your risk.
Eaton will accept no claim for warranty resulting from
deficiencies in the conversion. Please refer to the
Eaton literature web site for warranty information at
www.eaton.com/hydraulics/warranty.
Labeling Converted Units
All units that have been converted must retain the original
Eaton label and have a second Eaton label placed on the unit.
This second label at a minimum must state
Converted Eaton Model Code # (Final Eaton model code of
the converted unit)
Conversion done by (Name of your company)
Conversion Parts
All requests for specific conversion part information should
be addressed to your Eaton account representative.
Additional information can be found through your Eaton
customer connect portal. All requests or inquiries must be
accompanied by the complete model and serial number of
the base unit you want to convert.
Cleanliness
Cleanliness is extremely important when repairing a
hydrostatic pump or motor. Before disconnecting the lines,
clean foreign material from exterior of unit. Work in a clean
area. Clean all metal parts in clean solvent. Blow parts dry
with air. Don’t wipe parts with cloth or paper towel, because
lint or other matter could cause damage. Check all mating
surfaces. Replace any parts that have scratches or burrs that
could cause leakage. Don’t use coarse grit paper, files or
grinders on parts.
Environmental Concerns
Protection of the natural fundamentals of life is one of our
predominant tasks. We are continuously improving the
protection of the environment as far as applications are
concerned. We encourage you to contribute your share to
comply with this demand. In connection with work to be
performed, the environmental regulations of the machine
manufacturer must be respected.
In general:
• Greases and oils which cannot be used any more have to
be collected. They are normally a threat to water reserves
and must be kept away from the environment.
• Adhere to national and local regulations for waste disposal.
Seals
A good conversion policy is to replace all old seals with new
seals whenever units are disassembled. This avoids potential
damage during seal removal. Lubricate seals with petroleum
jelly. Use only clean and recommended oil when assembling
unit. Information on recommended filters and fluids can be
found in the Operational Parameters section.
Torque
All torque specifications are for lubricated threads. Bolts for
gasketed surfaces should be checked for proper torque.
Introduction
Exchanging Controls
• 6mm Allen wrench
• Torque wrench capable of
setting 32 N-m (24 ft-lb)
Exchanging Response
Orifices
• 3 mm Allen Wrench.
• 6 mm Allen wrench.
• Torque wrench capable of
32 N-m (24 ft-lb).
• Petroleum Jelly or clean
grease.
Maximum & Minimum
Displacement Adjustments
• 6mm Allen wrench
• 19mm closed-end wrench
Adjusting Crossover
Relief
• 5mm Allen wrench
• 17mm closed-end wrench
• 0-7000 psi pressure gauge or
transducer
Tools Required (continued)
4 EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Model Code
HMR
Regulated Variable Displacement Motors
(Open & Closed Loop Operation)
The following 36 digit coding system has been developed
to identify preferred feature options for the Eaton Closed
or Open Loop Hydraulic Motor. Use this code to specify a
motor with the desired features. All 36-digits of the code
must be present to release a new product number for
ordering. Please contact your local customer service rep-
resentative for leadtime questions.
1 2 3
Product
HMR –
Regulated Variable Displacement
Motors
l l l l l l
4 5 6
Displacement
075
– 075 cc
l
105
– 105 cc
l
135
– 135 cc
l
165
– 165 cc
l
210
– 210 cc
l
280
– 280 cc
l
7
Mounting Flange
A
– SAE J744 standard
l l l l l l
P
– Plug-in (*d) • •
8
Output Shaft
D
– splined ANSI B92.1 12/24 - 14 teeth
(SAE J744 C)
l l
C
– splined ANSI B92.1 8/16 - 15 teeth
(SAE J744 F)
l l
J
– splined ANSI B92.1 8/16 - 13 teeth
(SAE J744 D&E)
l l
K
– splined ANSI B92.1 16/32 - 21 teeth
l
L
– splined ANSI B92.1 16/32 - 23 teeth
l
M
– splined ANSI B92.1 16/32 - 27 teeth
l l l
N
– splined ANSI B92.1 16/32 - 33 teeth
l
P
– shaft coupling flange size 4 • •
9
Porting
M
– ISO 6149 metric
l l l l
D
– DIN 3852
l l l
10
Auxiliary Mount and Port Locations
1
– Radial ports / without PTO
l l l l l l
2
– Axial ports / without PTO • • • •
11
Attachments to Service Ports
0
– Without
l l l l l l
1
– Crossover relief block 250 bar (*p)
l l l
2
– Crossover relief block 300 bar (*p) • • •
3
– Crossover relief block 380 bar (*p) • • •
4
– Crossover relief block 420 bar (*p)
l l l
12
Motor Operation
A
– Closed loop operation
l l l l l l
B
– Open loop operation
l l l l l l
C
– bi-directional operation (when
position 20,21 is blocked)
l l l l l l
13
Motor Control
P
– pressure regulated
l l l l l l
14
Displacement Override
0
– without
l l l l l l
E
– electric
l l l l l l
H
– hydraulic high pressure (*o)
l l l l l l
L
– hydraulic low pressure (*o)
l l l l l l
15
Regulating Pressure Selection
0
– highest srevice port pressure
l l l l l l
E
– electric (*c)
l l l l l l
B
– through brake valve (*o)
l l l l l
16
Control Solenoids
0
– not applicable
l l l l l l
A
– AMP / 12V
l l l l l l
B
– AMP / 24 V
l l l l l l
C
– DIN / 12 V • • • • • •
D
– DIN / 24 V • • • • • •
E
– Deutsch / 12V • • • • • •
F
– Deutsch / 24V • • • • • •
17
Response Orifices
A
– 0,6 mm • • • • • •
E
– 1,0 mm
l l l l l l
18 19
Crossover Relief Valves Integrated
00
– Without • • • •
l l
AG
– 350 bar (*q) frame sizes 75;165: (*l)
l l l l
AH
– 420 bar (*q) frame sizes 75;165: (*l)
l l l l
20
Purge Relief Vlve
0
– Without purge devices
l l l l
A
– 10 bar standard purge flow
l l l l l l
B
– 14 bar standard purge flow
l l l l l l
C
– 10 bar reduced purge flow • • • • • •
D
– 14 bar reduced purge flow • • • • • •
E
– 10 bar increased purge flow • • • • • •
F
– flow controlled 6 l/min (*o)
l l l l l l
G
– blank plug instead of relief valve • • • • • •
21
Purge Shuttle Valve
0
– Without purge devices
l l l l
1
– Standard shuttle valve
l l l l l l
2
– Damped shuttle valve • • • • • •
3
– Shuttle valve blocked • • • • • •
22
Brake / Counterbalance Valve Preparation
0
– Without brake / counterbalance valve
preparation
l l l l l l
A
– With propel brake valve preparation
(*o)
• • • • •
23 24 25
Minimum Displacement Setting
000
– Catalog Pump Displacement
l l l l l l
value
– 022 - 055 (numeric 3 digit) •
value
– 031 - 075 (numeric 3 digit) •
value
– 041 - 089 (numeric 3 digit) •
value
– 052 - 108 (numeric 3 digit) •
value
– 055 - 150 (numeric 3 digit) •
value
– 085 - 175 (numeric 3 digit) •
26 27 28
Maximum Displacement Setting
000
– Catalog Pump Displacement
l l l l l l
29 30 31
Pressure Override Setting
value
– 190 - 260 bar (numeric 3 digits)
l l l l l l
32 33
Special Requirements
00
– Without (default)
l l l l l l
34
Surface Coating
0
– anti-rust conservation oil (default)
l l l l l l
A
– primer blue
l l l l l l
35
Unit Identification
A
– Eaton
l l l l l l
36
Type Code Release
A
– Revision Level
l l l l l l
75 105 135 165 210 280 75 105 135 165 210 280
HMR 135 A J M 1 0 A P 0 0 0 A 00 A 1 0 000 000 000 00 A A A
1
16
2 3 4
5
6 9 13 17118 10 14 1815
20 21 22 34 35 36
7
12
19
2423 25 3027 2926 3128 32 33
(*c) Closed loop operation only
(*d) DIN porting only (see position 9)
(*l) Axial service ports only (see position 10)
(*m) ISO metric porting only (see position 9)
(*o) Open loop operation only
(*p) Radial service ports only (see position 10)
(*q) Without purging devices only (see position
20 and 21)
(*v) With blocked purge shuttle valve only (see
position 21)
• Available Option l Preferred Option
5EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Blocking the Case Flushing Feature
Set Up
Important
This procedure must
be performed in a clean
environment using clean
Parts, Tools and Lubricants
6 EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Blocking the Case Flushing Feature
Procedure to Disable the Shuttle Valve Assembly
Remove the M22 Plug with the 12mm Allen wrench.
Important
This procedure applies
to HMR Motors with
“Standard” or “Optimized”
Shuttle Valve Assemblies.
For unit with “Dampened”
Shuttle Valve Assembly
please move to “Procedure
to Disable the Purge Valve”
section near the end of this
document.
1
Remove the spring with the needle-nose pliers. The
safest way to remove spools, springs etc. like this is
with a pencil magnet
2
Remove the Washer and Shuttle Spool simultaneously
with the needle-nose pliers making sure the spool is
not damaged. The best way to remove spools like this
is with a pencil magnet, that way the spool doesn't get
damaged..
3
Remove the Washer from the Shuttle Spool.
4
Replace the Original Shuttle Spool with the Disabled
Shuttle Spool
5
7EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Blocking the Case Flushing Feature
Procedure to Disable the Shuttle Valve Assembly (continued)
Important
This procedure applies
to HMR Motors with
“Standard” or “Optimized”
Shuttle Valve Assemblies.
For unit with “Dampened”
Shuttle Valve Assembly
please move to “Procedure
to Disable the Purge Valve”
section near the end of this
document.
Reinstall the Washer onto the Disabled Shuttle Spool.
6
Reinstall the Washer/Disabled Shuttle Spool
subassembly back into the Shuttle Body.
7
Reinstall the spring.
8
Reinstall the M22 Plug. Torque the M22 Plug to
122 N-m (90 ft-lb).
9
8 EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Blocking the Case Flushing Feature
Procedure to Disable the Purge Valve
Remove the purge valve.
Important
This procedure applies to
HMR Motors with Standard,
Optimized or Dampened
Shuttle Valve Assemblies.
1
Replace the existing purge valve with the blocked
purge valve
2
Install the blocked purge valve back into the motor and
torque it to 15 N-m (11 ft-lb)
3
9EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Closed Loop
Purge Valve
Open Loop
Purge Valve
Exchanging Purge Valves
Set Up and Procedure
Procedure to Exchange a Closed Loop Purge Valve
with an Open Loop Purge Valve
Remove the Closed Loop Purge Valve
with the 13mm wrench.
Install the Open Loop Purge Valve and tighten it with
the 17mm wrench. Torque it to 15 N-m (11 ft-lb).
Procedure to Exchange an Open Loop Purge Valve
with a Closed Loop Purge Valve
Remove the Open Loop Purge Valve
with the 17mm wrench.
Install the Closed Loop Purge Valve and tighten it with
the 13mm wrench. Torque it to 15 N-m (11 ft-lb).
1
2
1
2
Note:
The open loop purge valve
is slightly longer than the
closed loop purge valve.
10 EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Exchanging Shuttle Valve Assemblies
Set Up
Important
Although these locations
may differ from one unit
type to the other, the
internal parts are the same.
This procedure must
be performed in a clean
environment using clean
Parts, Tools and Lubricants.
Important
The following image
illustrates the different types
of shuttle valve assemblies
used on Eaton Hydraulics
H** motors:
HMF75
HMR75
HMV75
11EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Exchanging Shuttle Valve Assemblies
Disassembly Procedure
Remove the plug from the shuttle valve assembly as
shown here.
Note
An HMV motor is used to
show the necessary steps
throughout this document.
The same process can be
used for HMR motors.
1
In order to break loose the Loctite used to keep the
shuttle body in place, heat the area directly above the
shuttle assembly as shown here.
3
Remove the first set of shuttle spool, spring and shim
combination.
2
Use the special Eaton tool to remove the shuttle body.
4
Remove the remaining shuttle spool, spring and shim
combination.
5
Important
There are three types of shuttle valve assemblies used on
Eaton units and there are two different types of tools used
to remove the shuttle bodies.
A better look at the shuttle valve assembly is shown below.
New Tool 600.880.0001
12 EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Exchanging Shuttle Valve Assemblies
Assembly Procedure
Apply Green Loctite 648 on the threads inside the rear
head where the shuttle body will be installed.
Assemble the first set of shuttle spool/shim/spring into
the shuttle body as shown during the training.
Insert the whole set into the shuttle cavity on the rear
head and torque it using the special Eaton tool (refer to
the torque chart at the bottom of this page)
Note
An HMV motor is used to
show the necessary steps
throughout this document.
The same process can be
used for HMR motors.
1
Install the plug and torque it (refer to the torque chart at
the bottom of this page).
5
2
3
Insert the second set of shuttle spool/shim/spring into
the shuttle body.
4
Item Description Torque Value ft-lb (N-m)
Standard shuttle body 100
+7
(136
+9
)
Dampened shuttle body 44
+7
(60
+9
)
Optimized shuttle body 44
+7
(60
+9
)
Shuttle cavity plug 90
+7
(122
+9
)
Torque Chart
13EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Position of
Displacement
Overide Bloack
Electric DOR
Pneumatic DOR
High Pressure DOR
S.H.C.S.
(Typical)
O-Ring
(Typical)
Low Pressure DOR
Spring
Spool
Spool
Exchange Displacement Override Blocks
Set Up and Procedure
Procedure to Exchange a Displacement Override
(DOR) Block
Note
For the High-Pressure Hydraulic DOR configuration, there is
a spool in the DOR housing. This spool should be kept with
this DOR block. For the Pneumatic DOR configuration, there
will be a spool and a spring in the DOR housing. This spool
and spring should be kept with this DOR block.
Remove the four S.H.C.S. bolts from the existing DOR
block with the 3mm Allen wrench. Keep the S.H.C.S.
with the DOR being removed; Do NOT reused them
with the new DOR block.
Remove the existing DOR block from the motor
control. Make sure that the O-Ring is removed with
the DOR block.
3
Prior to installing the new DOR block, check:
a Make sure that the O-Ring is in good condition (i.e.
not damaged) and is resting properly in the o-ring
groove.
b If the new DOR block is the High-Pressure Hydraulic
DOR configuration, make sure that the Spool is
there.
c If the new DOR block is the Pneumatic DOR con-
figuration, make sure that the Spool and spring are
there.
4
Install the new DOR block and fasten it with the four
new S.H.C.S.; tighten the S.H.C.S. with the 3mm
Allen wrench and torque each one to:
• 3.8 N-m (2.8 ft-lb) [For the Low-Pressure Hydraulic,
High-Pressure Hydraulic, and Pneumatic DOR]
• 2.7 N-m (2.0 ft-lb) [For the Electric DOR].
1
2
14 EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
HMR Motor Control
with Pressure Compensator,
Electric DOR, and Brake
Pressure Shut-off
S.H.C.S.
(2 Places)
O-Ring
(5 Places)
Standard HMR Motor
Control with Pressure
Compensator and DOR
Exchange Controls
Set Up and Procedure
Procedure to Exchange Motor Controls
Note This procedure must be performed in a
clean environment using clean Parts, Tools and
Lubricants
Remove the existing motor control by removing the
two S.H.C.S. with the 6mm Allen wrench. Keep the
two S.H.C.S. for reuse.
Make sure to remove the five O-Rings with the
existing control.
Prior to installing the new motor control, verify
that the five O-Rings are in good condition (i.e not
damaged) and are properly positioned in the O-Ring
grooves.
Install the new motor control and fasten it with the
two S.H.C.S. from step #1.
Tighten the S.H.C.S. with the 6mm Allen wrench and
torque each one to 32 N-m (24 ft-lb).
1
2
3
4
5
15EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Important
This procedure must
be performed in a clean
environment using clean
Parts, Tools and Lubricants.
Exchanging Response Orifices
on HMR Motors
Set Up and Procedure
Remove the four bolts that secure the control block
as shown here.
1
Remove the control block as shown here.
2
Note
Often, the o-rings from the bottom of the control
block remain on the motor’s rear head. Make
sure that all o-rings are removed from the rear
head and installed on the control block.
16 EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Remove the existing response orifices as shown
here.
4
Response orifices are located at the bottom of the
control block in the positions shown here.
3
Install the new response orifices into the control block
as shown here.
5
Position the control block on the motors rear head as
shown here.
6
Exchanging Response Orifices
on HMR Motors (continued)
Set Up and Procedure
Important
Inspect all o-ring on the bottom of the control block;
if necessary use petroleum jelly to secure them in
position.
Install the mounting bolts and torque them to
32 N-m (24 ft-lb).
6
Important
Make sure to orient the control correctly so that all
ports align with each other.
17EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Rear-Ported
HMR
Side-Ported
HMR
Maximum
Displacement
Adjustment
(see note #1)
Adjustment
Stud (Typical)
Seal Nut
(Typical)
Maximum
Displacement
Adjustment
(see note #1)
Maximum Displacement
Adjustment Procedure
Set Up and Procedure
Procedure for Adjusting the HMR Maximum
Displacement
Start the prime mover and adjust it to operating
speed.
Actuate the HMR per the requirements stated in
"Note #3".
To Adjust the Motor Maximum Displacement:
a. Hold the adjustment stud stationary with the 6mm
Allen Wrench.
b. Loosen the seal nut with the 19mm wrench.
c. Turn the adjustment stud IN to decrease the
maximum displacement or turn it OUT to increase
the maximum displacement.
d. Once the desired maximum displacement has been
acquired, hold the adjustment stud stationary with
the 6mm Allen wrench and tighten the seal nut
with the 19mm wrench. The proper torque for the
seal nut is 60 N-m (44 ft-lb).
1
2
3
Note #1
All "side-ported" HMR
motors have a maximum
displacement adjustment.
But NOT all "rear-ported"
HMR motors have a
maximum displacement
adjustment. Depending on
the specific configuration
of your motor, it may or
may not have a maximum
displacement adjustment.
For those HMR motors
without a maximum
displacement adjustment,
please ignore this document.
Note #3
The HMR motors auto-
matically default to minimum
displacement unless:
• The motor is loaded beyond
the regulation begin setting
in which case the motor
automatically shifts to
maximum displacement
then de-strokes to
a displacement to
accommodate the torque
requirement (i.e. as the
load pressure drops).
• Control pressure is supplied
into the displacement
override port thus forcing
the HMR to maximum
displacement.
Prior to adjusting the HMR
maximum displacement, you
must either:
• Provide means to supply
control pressure into the
displacement override port.
• Load the motor to create
and maintain a pressure
greater than the regulation
begin setting being careful
NOT to open the cross-over
relief valves (if available).
Size 55 75 105 135 165
Max Displacement 54.8 75.9 105.0 135.6 165.0
Limit (CC)
Continuous Max Speed at Max
Speed Displacement 4100 3800 3500 3200 3100
(RPM) Continuous Max Speed at Min
Displacement 4700 4400 4100 3700 3500
Note #2
The following table illustrates the maximum displacement limits and the maximum
allowable rotational speeds for Both Max. and Min. displacements.
18 EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Rear-Ported
HMR
Side-Ported
HMR
Minimum
Displacement
Adjustment
Adjustment
Stud (Typical)
Seal Nut
(Typical)
Minimum
Displacement
Adjustment
Minimum Displacement
Adjustment Procedure
Set Up and Procedure
Procedure for Adjusting the HMR Minimum
Displacement
Note
To properly adjust the minimum displacement of the HMR
motor, it is preferable that the motor free-spin while making
the adjustment - This would insure that the motor was at
minimum displacement.If this is not possible, then the HMR
must be completely unloaded when making the minimum
displacement adjustment to insure that it is at minimum
displacement.
Start the prime mover and adjust it to operating
speed.
Actuate the HMR motor under no load to insure it is
at minimum displacement.
Note
The HMR motor automatically defaults to minimum
displacement unless:
• The motor is loaded beyond the regulation begin setting in
which case the motor automatically shifts to a displacement
to accommodate the torque requirement.
• Control pressure is supplied into the displacement override
port thus forcing the HMR to maximum displacement.
To Adjust the Motor Minimum Displacement:
a. Hold the adjustment stud stationary with the 6mm
Allen Wrench.
b. Loosen the seal nut with the 19mm wrench.
c. Turn the adjustment stud IN to increase the
minimum displacement or turn it OUT to decrease
the minimum displacement.
d. Once the desired minimum displacement has been
acquired, hold the adjustment stud stationary with
the 6mm Allen wrench and tighten the seal nut
with the 19mm wrench. The proper torque for the
seal nut is 60 N-m (44 ft-lb).
Note
The following table illustrates
the recommended minimum
displacements and allowable
rotational speeds for both Max.
and Min. displacement. The
HMR motors should NOT be
operated at higher speeds if the
recommended displacements
are used, unless specifically
approved by Eaton Engineering.
If higher rotational speeds are
required for your application, you
must consult Eaton Engineering
for the required minimum
displacement setting.
1
2
3
Size 55 75 105 135 165
Max Displacement 18.3 25.3 35.0 45.2 55.2
Limit (CC)
Continuous Max Speed at Max
Speed Displacement 4100 3800 3500 3200 3100
(RPM) Continuous Max Speed at Min
Displacement 4700 4400 4100 3700 3500
19EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Procedure to Adjust
Crossover Relief Valves
Set Up and Procedure
Procedure to Adjust Crossover Relief Valves
Important
All supplemental relief valves used in the same circuit as
the Single-Setting Relief Valves must be set higher than the
desired setting for the relief valves. This must be done prior
to performing the steps in this Service Bulletin.
Install the pressure gauge or transducer to measure
the pressure at Workport "A".
The function that the HMR motor actuates must
be locked as to prevent the HMR- 02 motor from
rotating. This will force oil to pass over the relief valve
once oil is supplied to the HMR motor.
Supply flow to Workport "A". Only supply the
maximum flow that the motor will receive during
normal operation.
Important
When pushing oil past the relief valve as described in step
#3, the hydraulic oil and relief valve will heat up rapidly.
Therefore, limit the timing in step #3 to 30 seconds or less.
You should monitor the temperature of the hydraulic oil and
HMR motor to ensure that they do NOT exceed 194°F (90°C).
If the temperature of either reaches this maximum limit, stop
all testing until the temperature cools off.
While supplying flow to Workport “A”, read the
pressure on the gauge - This is the setting for the
Workport "A" Relief Valve.
To adjust the Workport "A" Relief Valve pressure
setting:
a. Refer to the illustrations on page 1 to make sure
you are working on the correct relief valve.
b. Hold the Adjustment Stud stationary with the 5mm
Allen wrench, and loosen the Seal Nut with the
17mm wrench.
c. Turn the Adjustment Stud IN to increase the relief
valve pressure setting or OUT to decrease the relief
valve pressure setting.
d. Once the desired pressure setting has been
acquired, hold the Adjustment Stud stationary and
tighten the Seal Nut. The proper torque for the Seal
Nut is 60 N-m (44 ft-lb).
Then repeat steps #1 through #5 for Workport "B".
1
2
3
4
5
6
Workport “B”
Workport “B”
Workport “A”
Workport “A”
Workport “B”
Relief Valve
VD20-04 Single Setting
Relief Valves
VD20-04 Single Setting
Relief Valves
Workport “A”
Relief Valve
Workport “B”
Relief Valve
Workport “A”
Relief Valve
Adjustment Stud
Adjustment Stud
Seal Nut
Seal Nut
Workport “B”
Workport “B”
Workport “A”
Workport “A”
Workport “B”
Relief Valve
VD20-04 Single Setting
Relief Valves
VD20-04 Single Setting
Relief Valves
Workport “A”
Relief Valve
Workport “B”
Relief Valve
Workport “A”
Relief Valve
Adjustment Stud
Adjustment Stud
Seal Nut
Seal Nut
20 EATON Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Operational Parameters
Lifetime Recommendations
Eaton high pressure units are designed for excellent
reliability and long service life. The actual service life of a
hydraulic unit is determined by numerous factors. It can be
extended significantly through proper maintenance of the
hydraulic system and by using high-quality hydraulic fluid.
Beneficial Conditions For Long Service Life
Speed Lower continuous maximum speed
Operating Pressure Less than 300 bar Δp on average
Maximum Pressure Only at reduced displacement
Viscosity 15 ... 30 cSt
Power Continuous power or lower
Purity of Fluid 18/16/13 in accordance with ISO 4406 or better
Adverse Factors Affecting Service Life
Speed Between continuous maximum speed and intermittent
maximum speed
Operating Pressure More than 300 bar Δp on average
Viscosity Less than 10 cSt
Power Continuous operation close to maximum power
Purity of Fluid Lower than 18/ 16/ 13 in accordance with ISO 4406
Filtration
For Reliable Proper Function and Long Service Life 18/16/13 in accordance with ISO 4406 or better
Minimum Requirements 20/18/15 in accordance with ISO 4406
Commissioning The minimum purity requirement for the hydraulic oil is based on the most sensitive
system component. For commissioning we recommend a filtration in order to achieve
the required purity.
Filing in Operation of Hydraulic Systems The required purity of the hydraulic oil must be ensured during filling or topping up.
When
drums, canisters or large-capacity tanks are used the oil generally has to be filtered.
We recommend the implementation of suitable measures (e.g. filters) to ensure that
the required minimum purity of the oil is also achieved during operation
International Standard Code number according to ISO 4406 purity class according to
SAE AS 4059
18/16/13 corresponds to 8A/7B/7C
20/18/15 9A/8B/8C
Operational parameters.
Filtration
In order to guarantee
long-term proper function
and high efficiency of
the hydraulic pumps the
cleanliness level of the
lubricant must comply
with the following
criteria according to
Eaton Hydraulic Fluid
Recommendation 03-401-
2010. Maintaining the
recommended cleanliness
level can extend the
service life of the hydraulic
system significantly.
For reliable proper function and long service life
18/16/13 in accordance with ISO 4406 or better
Commissioning
The minimum cleanliness level requirement for the
hydraulic oil is based on the most sensitive component.
For commissioning we recommend a filtration in order to
achieve the required cleanliness level.
Filling and operation of hydraulic systems
The required cleanliness level of the hydraulic oil
must be ensured during filling or topping up. When
drums, canisters, or large-capacity tanks are used the
oil generally has to be filtered. We recommend the
implementation of suitable filters to ensure that the
required cleanliness level of the oil is achieved and
maintained during operation.
International standard
Code number according to ISO 4406
18/16/13
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