Danfoss MMF044D, MMV044D Service guide
Parts Manual
Series 40 MMF044D and MMV044D
Axial Piston Motors
www.danfoss.com
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Revision history Table of revisions
Date Changed Rev
June 2019 Updated end cap part numbers 0203
March 2018 Update to Engineerin Tomorrow design 0202
2 | © Danfoss | June 2019 AX00000065en-000203
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Contents
General information
Service Parts Identification............................................................................................................................................................4
Nameplate...........................................................................................................................................................................................4
Date code............................................................................................................................................................................................ 5
About service bulletins...................................................................................................................................................................5
Procedure to identify a part..........................................................................................................................................................6
Regional part numbers............................................................................................................................................................. 6
Example of a part identification (M44 motor)...................................................................................................................6
Adobe Acrobat 2-page viewing..................................................................................................................................................7
Order code, fixed displacement..................................................................................................................................................8
Order code, variable displacement............................................................................................................................................9
Fixed displacement
Common parts and special hardware.................................................................................................................................... 10
Common parts...........................................................................................................................................................................10
Special hardware NBC-NBY...................................................................................................................................................12
Special hardware NCD-NCJ...................................................................................................................................................14
Special hardware NCK-XXX...................................................................................................................................................18
Shaft and shaft seal....................................................................................................................................................................... 22
Shaft seal......................................................................................................................................................................................22
Shaft 1-D...................................................................................................................................................................................... 24
Shaft N, S......................................................................................................................................................................................28
End cap.............................................................................................................................................................................................. 30
End cap 1, 2.................................................................................................................................................................................30
End cap 5, 8, 9............................................................................................................................................................................ 32
End cap D-G................................................................................................................................................................................36
End cap H, I, J..............................................................................................................................................................................38
End cap K-U.................................................................................................................................................................................42
End cap W, Y............................................................................................................................................................................... 46
Cylinder block kit............................................................................................................................................................................48
Housing B-U..................................................................................................................................................................................... 50
Overhaul seal kit.............................................................................................................................................................................54
Notes...................................................................................................................................................................................................55
Variable displacement
Common parts and special hardware.................................................................................................................................... 56
Shaft and shaft seal....................................................................................................................................................................... 58
Swashplate, displacement and control features................................................................................................................ 60
MMV044D housing/end cap......................................................................................................................................................62
MMV044D seal kit.......................................................................................................................................................................... 63
Service bulletin
SB-1998-008.....................................................................................................................................................................................64
SB-1998-092.....................................................................................................................................................................................65
SB-1999-058.....................................................................................................................................................................................67
SB-2000-026A..................................................................................................................................................................................68
SB-2002-021.....................................................................................................................................................................................69
SB-2005-015.....................................................................................................................................................................................71
SB-2017-012.....................................................................................................................................................................................72
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MADE IN U.S.A.
Serial No. Fabr- Nr
A-16-36-23456
Model Code Typ
Model No.
MMF-044-D-AF-M-A-B-NNS
4443026
Ident-Nr
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
General information
Service Parts Identification
The following information and procedure is used to identify the module group, item number,
manufacture date, part number, and part name of the parts included in the .
The parts listed include all parts which may be used when performing either “Minor Repairs”, “Major
Repairs” or “Conversions” on the .
Nameplate
Each unit will have a nameplate affixed to the housing. The nameplate will include the following
information:
Model Code
The Danfoss model code completely defines the specific unit and must be used when ordering parts to
service this product.
Model Number
The Danfoss model number is used by the factory in manufacturing. On repeat orders, a complete unit
can be ordered by the model number.
Serial Number
The Danfoss serial number is used to identify the manufacture date and the unit sequence in the build.
The serial number is also used to identify the units warranty time period.
The letter code indicates the location of original manufacture (assembly).
The first number (2 digits) indicates the year of manufacture. The second number (2 digits) indicates the
calendar week of manufacture.
The third number (5 digits) is a sequential number used to identify a specific unit.
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Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
General information
Date code
The date code is defined as the year and week of manufacture. The same item number may list more than
one part number. This indicates that there is more than one configuration for that item number. You will
see that there are different date codes for the different part numbers. Find the date code of your unit
from the nameplate to determine which service part number you need to order.
Example: The service part desired is item G30
Order Code Item Date Begin Date End Part Number Part Name Qty. per
80 G30 89-17 8000243 End cap gasket 1
G30 89-16 8000151 End cap gasket
All units using this order code with a date code prior to 89-17 must use part number “8000151.” All units
with a date code of 89-17 and newer must use part number “8000243.”
About service bulletins
A Service Bulletin Number (SB-_ _ _ _ - _ _ _) may follow the “Part Name” of the part you desire. You must
read that Service Bulletin prior to ordering that part. The information contained in these Service Bulletins,
as of the print date of this bulletin, are included at the end of this manual. Service Bulletins contain more
detailed information such as interchangeability, what additional parts are involved, etc. It is suggested
that you add additional Service Bulletins to this manual as you receive them.
Model/Kit
1
(SB-1995-006)
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Danfoss | June 2019 AX00000065en-000203 | 5
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
General information
Procedure to identify a part
The modular design of this product results in a simplified service parts list and part number identification
procedure.
The same item numbers are used for same part names on all units within a product type. A part number
that has another number following it in parentheses is done to make this a world wide manual.
Regional part numbers
Some part numbers are region specific and should be ordered accordingly.
As an example, the part number (example: 314583 (9008000-0118) will be used. The first number is sold
in Germany. The number in parentheses is sold in the United States. Customers would order
9008000-0118 if ordering the part in the United States.
Example of a part identification (M44 motor)
The nameplate on a Series 40 motor has an order code of MMF044 D A F M A B NNS. Use the following
procedure to identify the drive shaft part number.
1. Referring to the input shaft module in the Order code, fixed displacement, the output shaft option for
this motor is identified by the code F.(MMF044 D A FMA B NNS).
2. Referring to the Service Parts List, find the shaft group.
3. Find the order code that relates to this unit, which isF.
4. Follow along shaft item D01 to find the part number.
The part number found is 4350427.
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Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
General information
Adobe Acrobat 2-page viewing
While viewing manual in Adobe Acrobat, the following settings need to be applied to ensure proper
page display.
1. Select “View” → “Page Display” → “Two Page View”
2. Select “View” → “Page Display” → “Show Cover Page in Two Page View”
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Danfoss | June 2019 AX00000065en-000203 | 7
MM
Product
Frame size
Type
Seal group
Output shaft
End cap
Housing
Cylinder block
F 0 4 4 D
A F M A B
N N S
Special hardware
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
General information
Order code
8 | © Danfoss | June 2019 AX00000065en-000203
MM
Product
Frame size
Type
Seal group
Output shaft
Minimum Displacement
Housing/end cap
Control features
V 0 4 4 D
A A D L R
N N N
Special hardware
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
General information
Order code, variable displacement
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Danfoss | June 2019 AX00000065en-000203 | 9
*B37
T01
B21
T02
B40
B45
B51
B40
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Fixed displacement
Common parts and special hardware
S40 MMF common parts
Parts configuration
* Included in overhaul seal kit Q210
10 | © Danfoss | June 2019 AX00000065en-000203
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Fixed displacement
Common parts
Item Date Begin Date End Part Number Part Name Qty. per
B21 95-42 4350148 Thrust plate 1
B37 95-42 4350089 End cap gasket 1
B40 95-42 9004875-0100 Spring pin 2
B45 95-42 315325 (9005110-8700) Plug assembly 1
B51 95-42 315325 (9005110-8700) Plug assembly 1
T01 95-42 4350754 Motor valve plate (SB-1999-058 on page 67) 1
T02 95-42 9004700-1910 Slotted pin 1
Model/Kit
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T04
T03
T04
(NBY)
(NBC, NBJ, NBO)
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Fixed displacement
S40 MMF special hardware NBC-NBY
Parts configuration
12 | © Danfoss | June 2019 AX00000065en-000203
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Fixed displacement
Order code: NBC
Item Date Begin Date End Part Number Part Name Qty. per
T03 14-05 9006200-0281 Retaining ring 1
T04 14-05 5000731 Ball bearing 1
Order code: NBJ
T03 06-10 9006200-0281 Retaining ring 1
T04 06-10 5000731 Ball bearing 1
Order code: NBO
T03 12-13 9006200-0281 Retaining ring 1
T04 12-13 5000731 Ball bearing 1
Order code: NBY
T03 12-36 9006200-0281 Retaining ring 1
T04 12-36 357616 Roller bearing 1
Model/Kit
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T04
T03
T04
E06
E26
*E063
E06
E07
E09
E29
E27
*E063
E26
T04
T03
T04
*E063
*E063
(NJC)
(NCD & NCF)
(NCH)
(NCE & NCG)
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Fixed displacement
S40 MMF special hardware NCD-NCJ
Parts configuration
* Included in overhaul seal kit Q210
14 | © Danfoss | June 2019 AX00000065en-000203
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Fixed displacement
Order code: NCD
Item Date Begin Date End Part Number Part Name Qty. per
E06 13-09 11126727 SCR plug assembly 1
E07 13-09 4800661 Spring 1
E09 13-09 3103375-0345 SCR valve, 345 bar 1
E26 13-09 9005110-7500 Plug assembly 1
E063 13-09 001131 (9004201-5000) O-ring 2
T03 13-09 9006200-0281 Retaining ring 1
T04 13-09 5000731 Ball bearing 1
Order code: NCE
E06 13-09 9005110-7500 Plug assembly 1
E26 13-09 11126727 SCR plug assembly 1
E27 13-09 4800661 Spring 1
E29 13-09 3103375-0345 SCR valve, 345 bar 1
E063 13-09 001131 (9004201-5000) O-ring 2
T03 13-09 9006200-0281 Retaining ring 1
T04 13-09 5000731 Ball bearing 1
Model/Kit
Order code: NCF
E06 13-09 11126727 SCR plug assembly 1
E07 13-09 4800661 Spring 1
E09 13-09 3103375-0280 SCR valve, 280 bar 1
E26 13-09 9005110-7500 Plug assembly 1
E063 13-09 001131 (9004201-5000) O-ring 2
T03 13-09 9006200-0281 Retaining ring 1
T04 13-09 5000731 Ball bearing 1
Order code: NCG
E06 13-09 9005110-7500 Plug assembly 1
E26 13-09 11126727 SCR plug assembly 1
E27 13-09 4800661 Spring 1
E29 13-09 3103375-0280 SCR valve, 280 bar 1
E063 13-09 001131 (9004201-5000) O-ring 2
T03 13-09 9006200-0281 Retaining ring 1
T04 13-09 5000731 Ball bearing 1
Parts continue to the next 2 pages.
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T04
T03
T04
E06
E26
*E063
E06
E07
E09
E29
E27
*E063
E26
T04
T03
T04
*E063
*E063
(NJC)
(NCD & NCF)
(NCH)
(NCE & NCG)
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Fixed displacement
Parts configuration
* Included in overhaul seal kit Q210
16 | © Danfoss | June 2019 AX00000065en-000203
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Fixed displacement
Order code: NCH
Item Date Begin Date End Part Number Part Name Qty. per
E06 14-15 9005110-7500 Plug assembly 1
E26 14-15 11126727 SCR plug assembly 1
E27 14-15 4800661 Spring 1
E29 14-15 3103375-0280 SCR valve, 280 bar 1
E063 14-15 001131 (9004201-5000) O-ring 2
T03 14-15 9006200-0281 Retaining ring 1
T04 13-09 357616 Roller bearing 1
Order code: NCJ
E06 14-46 11126727 SCR plug assembly 1
E07 14-46 4800661 Spring 1
E09 14-46 3103375-0280 SCR valve, 280 bar 1
E26 14-46 9005110-7500 Plug assembly 1
E063 14-46 001131 (9004201-5000) O-ring 2
T03 14-46 9006200-0281 Retaining ring 1
T04 14-46 357616 Roller bearing 1
Model/Kit
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Danfoss | June 2019 AX00000065en-000203 | 17
T04
T03
T04
E29
E27
*E063
E26
T04
T03
E06
*E063
T04
T03
*E063
E06
E07
E09
E26
*E063
(NCK)(NCK)
(NCL)
(NNB, NNF, NNQ, NNR
NNS, NNY, NRB)
(NDD, NDQ, NGA, NNN
NNW, NYJ, XXX)
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Fixed displacement
S40 MMF special hardware NCK-NYJ
Parts configuration
* Included in overhaul seal kit Q210
18 | © Danfoss | June 2019 AX00000065en-000203
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Fixed displacement
Order code: NCK
Item Date Begin Date End Part Number Part Name Qty. per
E06 14-46 11126727 SCR plug assembly 1
E07 14-46 4800661 Spring 1
E09 14-46 3103375-0345 SCR valve, 345 bar 1
E26 14-46 9005110-7500 Plug assembly 1
E063 14-46 001131 (9004201-5000) O-ring 1
T03 14-46 9006200-0281 Retaining ring 1
T04 14-46 357616 Roller bearing 1
Order code: NCL
E06 14-46 9005110-7500 Plug assembly 1
E26 14-46 11126727 SCR plug assembly 1
E27 14-46 4800661 Spring 1
E29 14-46 3103375-0345 SCR valve, 345 bar 1
E063 14-46 001131 (9004201-5000) O-ring 2
T03 14-46 9006200-0281 Retaining ring 1
T04 14-46 357616 Roller bearing 1
Model/Kit
Order code: NDD
T03 06-10 9006200-0281 Retaining ring 1
T04 06-10 5000731 Ball bearing 1
Order code: NDQ
T03 12-24 9006200-0281 Retaining ring 1
T04 12-24 5000731 Ball bearing 1
Order code: NGA
T03 06-10 9006200-0281 Retaining ring 1
T04 06-10 5000731 Ball bearing 1
Order code: NNB
T03 06-10 9006200-0281 Retaining ring 1
T04 06-10 357616 Roller bearing 1
Order code: NNF
T03 06-10 9006200-0281 Retaining ring 1
T04 06-10 357616 Roller bearing 1
Order code: NNN
T03 95-42 9006200-0281 Retaining ring 1
T04 95-42 5000731 Ball bearing 1
Parts continue to the next 2 pages.
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Danfoss | June 2019 AX00000065en-000203 | 19
T04
T03
T04
E29
E27
*E063
E26
T04
T03
E06
*E063
T04
T03
*E063
E06
E07
E09
E26
*E063
(NCK)(NCK)
(NCL)
(NNB, NNF, NNQ, NNR
NNS, NNY, NRB)
(NDD, NDQ, NGA, NNN
NNW, NYJ, XXX)
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Fixed displacement
Parts configuration
* Included in overhaul seal kit Q210
20 | © Danfoss | June 2019 AX00000065en-000203
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Fixed displacement
Order code: NNQ
Item Date Begin Date End Part Number Part Name Qty. per
T03 09-22 9006200-0281 Retaining ring 1
T04 09-22 357616 Roller bearing (SB-1998-008 on page 64) 1
Order code: NNR
T03 95-42 9006200-0281 Retaining ring 1
T04 95-42 357616 Roller bearing (SB-1998-008 on page 64) 1
Order code: NNS
T03 95-42 9006200-0281 Retaining ring 1
T04 95-42 357616 Roller bearing (SB-1998-008 on page 64) 1
Order code: NNY
T03 06-10 9006200-0281 Retaining ring 1
T04 06-10 357616 Roller bearing (SB-1998-008 on page 64) 1
Model/Kit
Order code: NRB
T03 06-16 9006200-0281 Retaining ring 1
T04 06-16 357616 Roller bearing 1
Order code: NYJ
T03 06-16 9006200-0281 Retaining ring 1
T04 06-16 5000731 Ball bearing 1
Order code: XXX
T03 06-16 9006200-0281 Retaining ring 1
T04 06-16 5000731 Ball bearing 1
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Danfoss | June 2019 AX00000065en-000203 | 21
*C01
C02
C03
C05
*C04
*C01
C02
C03
C05
*C04
(A)
(B)
(C)
Parts Manual
Series 40 MMF044D and MMV044D Axial Piston Motors
Fixed displacement
Shaft and shaft seal
S40 MMF shaft seal
Parts configuration
22 | © Danfoss | June 2019 AX00000065en-000203
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