Danfoss MCV104A Manual Download Page 2

ORDERING INFORMATION (continued)

DEVICE IDENTITY

This is the basic EDC.  The model code is MCV104A.

CONFIGURATION

MODEL

CODE

PRESSURE
OVERRIDE

HIGH

RESPONSE

SERVO
PORTS

1
2
3
4
5
6
7
8

Yes
Yes

No

Yes
Yes

Yes

Yes

No

Yes

Yes

Yes
Yes
Yes
Yes

No

from  condensing  on  the  inside  during  extreme  temperature 
changes. Dual coil valves have all four pin connections active. 
See the Wiring section. 

TABLE  B.  INFORMATION  NECESSARY  TO  SPECIFY  THE  KIT  AS-
SEMBLY.

The  pressure  override  and  pressure  limiter  accomplish  the 
same function - they shift the pump swashplate toward neutral 
when system pressure exceeds a preset threshold.  They thus 
limit maximum system pressure, protect components from heat 

-

power.  Pressure override is available only for Series 2X pumps, 
and pressure limiting is available only for 3X pumps.  Pressure 
limiting  and  annular  control  are  not  available  together.  If  the 
model code chosen indicates that pressure override function is 

-

ration parameter, above).  The pressure override valve must be 
obtained through Sauer-Danfoss, Ames, IA.  The pressure limiting 
feature is inherent in the design of the MCV104 when applied 
with the 3X pump.

SERIES

DESCRIPTION

9

Any Pump, Less Linkage

MODEL

The model code is “9”.

PILOT STYLE

MODEL

DESCRIPTION

22

23

26

27

(4-20 mA)

40

It may be preferred to apply the dual coil versus the single coil 
EDC. The dual coil allows two command sources to be combined 
at the torque motor, the resulting signal being the 

erence be-

tween the two. Dual coil models can be connected in parallel or 

04

PRODUCT TYPE

KIT TYPE

PUMP SERIES

KK  

XX

X

ring, drag link, spacer plate, swashplate pin, link and ball assem-
bly, hex screws, O-rings and gaskets.  In some cases not all the 
above are necessary for installation and they are not included 
in the kit.

Several  Sauer-Danfoss  variable  pumps  come  without  pre-
mounted controls.  These pumps will need additional mounting 
hardware that generally accompanies the control in order to 
accomodate the EDC.  The pump numbers are:  34-2035, 34-2060, 
34-2080, 36-2047, 36-2056, 36-2081, 36-2082.

If you wish to mount an EDC on one of these pumps, order a 
K07015  (9004700-1212)  roll  pin,  a  9004875-0020  straight  pin 
and a 9340301 (for Series 34 pumps) or 9360354 (for Series 36 
pumps) drag link.

SPARE PARTS

See the Spare Parts Section of this book for a list of spare parts 
available for the MCV104.  Other non-standard spare parts, such 

Order  Sauer-Danfoss  Pressure  Override  Valve  through 
Sauer-Danfoss,  Ames,  IA    (515)  239-6000  or  Sauer-Danfoss 
Distributors.

Order the EDC either factory installed on pumps or as an indi-
vidual control.

PRODUCT TYPE

         The model code is "04".

  

         

PUMP SERIES

         20 - 27, 33, 34, or 36.

KIT TYPE

        MODEL CODE

DESCRIPTION

Standard EDC

EDC with POR

* Pressure Override Only

© Danfoss, 2013

K07116

 •

 Rev A

B

 • September 2013

2

Summary of Contents for MCV104A

Page 1: ...l DEVICE IDENTITY CONFIGURATION SERIES PILOT STYLE MCV104A X 9 XX FEATURES Servo control deadband independent of signal null dead band offers safety combined with accurate and responsive control inter...

Page 2: ...preferred to apply the dual coil versus the single coil EDC Thedualcoilallowstwocommandsourcestobecombined atthetorquemotor theresultingsignalbeingthe erencebe tween the two Dual coil models can be c...

Page 3: ...p Screw 27 K07159 1 Plug 7 K01291 2 Plug 28 K07010 1 O Ring for Item 27 8 K22582 1 Filter Assembly 29 CAUTIO N 4 Do Not Remove Cover Screws 9 K07034 2 Screw Neutral Adjust Cover 30 K02361 1 Piston Pac...

Page 4: ...r Screws 4 K26275 1 3 8 24 PCP Null Access Screw K00920 1 1 4 28 PCP Null Access Screw 5 K28475 1 PCP Cover Kit 6 K21436 1 Silicone Oil Kit 4000 cs 7 K04790 1 Connector O ring 8 K08687 4 Connector Scr...

Page 5: ...used 24 Vdc for low curent models The EDC is designed to be controlled from a dc current source or voltage source Pulse width modulation PWM is not required But if a PWM signal is used avoid a carrie...

Page 6: ...1 4 LG 1 4 20 X 3 LG 1 4 20 X 2 1 2 LG 1 4 20 X 2 1 4 LG 2 5 3 4 2 5 4 3 2 5 3 4 2 5 3 4 2 5 4 3 2 5 Dimensions of the MCV104A in Millimeters Inches Table of Mounting Bolt Dimensions Quantity and Par...

Page 7: ...mount of erential pressure required to move the actuator spool one d e g n a h c e b t o n n a c d n a d n a b d a e d l o o p s r o t a u t c a e h t f o h t d i w band is moved toward or away from t...

Page 8: ...Step Input EDCs Run Into 1000 PSI Load PERFORMANCE Schematic of the Internal Workings of the MCV104A Without Optional Pressure Override Valve Oil Paths Shown Externally For Clarity TIME VS SWASHPLATE...

Page 9: ...ameter 5 2 or 4 gray cable seals accept 2 81 3 49 mm wire diameter 6 2 or 4 blue cable seals accept 3 50 4 21 mm wire diameter See Ordering Information To assemble the female tower connector use the f...

Page 10: ...g the holder down into the detented position to trap the wires in the housing The third rib should be sealed into the housing 8 Plug the shroud connector from the valve into the tower connector just c...

Page 11: ...theproperminimum erential pressure psid level replace the PCP 4 To restore the PCP null requires the hydraulic system to be running and a gage in each control port Locate and remove the null access sc...

Page 12: ...l o r t n o c f o s s o l g n i t l u s e r a h t i w k c a b d e e f f o s s o l n i t l u s e r y a m n o i t Series 3X pumps meet this requirement but all Series 2X units not already equipped with...

Page 13: ...spacer is one quarter inch thick if it is a 26 Series the spacer is 1 1 2 inch thick Other series do not require a spacer One gasket and 3 O rings must be installed on the under side of the spacer 6...

Page 14: ...ge pressure begins to decrease Then slowly turn the adjustment screw coun terclockwise observing the angle of rotation until charge pressuredecreasesagain chargepressurewillriseapproxi mately20psiinne...

Page 15: ...al Coil Packard MCV104A 1 or 5 0 thru 9 0 3 or 4 MCV104A 5 9 2 6 Single Coil MS MCV104A 1 or 5 0 thru 9 0 5 or 6 MCV104A 5 9 2 7 Dual Coil MS MCV104A 1 or 5 0 thru 9 0 7 or 8 MCV104A 6 9 2 2 Single Co...

Page 16: ...MCV104A7927 Pressure Override 5 62 507B MCV104A1927 Servo Ports 6 62 509B MCV104A3927 Pressure Override Servo Ports 7 62K518 MCV104A5932 Intrinsically Safe with FM approval 8 62 522B MCV104A4927 Pres...

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