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Items referenced in Table D - Service Parts, page 4.

(1) Item 4.

(2) Items 4, 6, 8, 9, 10, 11, 13, 14. 

The following steps are

recommended when servicing those service parts listed
in Table D - Service Parts, page 4.

Preferred service tools are:

• Screw driver TX 15 and TX 10
• Solder SN62
• Needle nose pliers, small tip
• Solder iron, electronic type
• Volt/ohm meter (VOM)
• Cleaning solvent, Chemtronics 2000 ES 1601
• Torque wrench, 0-50 in•lb (0-66 N•m)

REPLACING COVER AND/OR
ELECTRICAL CONNECTOR

1.

Wipe  down  external  surface  to  ensure  that  loose

contaminants will not fall inside the housing.

2.

Place the valve in a firm position at 45° with the electrical

connector tilted upwards (PCPs built after 1988 are filled
with a silicon oil).  Locate and remove the four connector
screws (Item 9 if MS connector, or Item 11 if Packard
connector).

3.

Hold the electrical connector and untwist wires by rotating

the connector CCW two turns while gently pulling away
from the housing.

4.

Clean the solder connections inside connection of the

electrical connector with degreaser.  Unsolder the wires,
noting which pin goes to which wire color (i.e., Pin A to
black,  Pin  B  to  red,  Pin  C  to  brown,  etc.).  With  the
connector held firmly, place the solder iron against the
base solder cup if MS, and pin if Packard, until the wires
can be gently pulled away.

5.

The cover can now be removed and replaced if required.

Be sure the cover gasket (Item  3) is firmly seated into the
cover  base  and  is  in  good  condition  before  cover  is
installed.  Torque  cover  screws  to  12-15  in•lb  (16-20
N•m).

6.

Verify that wire to pin connections are correct before

soldering wires.  Also ensure that the connector gasket
(see Table D - Service Parts, Item 3, page 4) is in place
before soldering.

7a. For the MS style connector, ensure that the cups have

sufficient  solder  (approximately  level).  If  additional
solder is required, place solder iron against the base of
the cup and add solder.  While solder is still liquid, place
wire  in  the  cup,  remove  iron  and  let  cool  for  several
seconds while holding wire firmly.

SERVICE PARTS 

(continued)

DO NOT Remove Cover Screws, unless replacing cover.

WARNING

7b. For the Packard style connector, the wire should extend

around and contact the terminal post for at least 180° (1/
2 wrap to a maximum of 270°).  When ready to solder,
heat the terminal and add solder, remove iron, and let
cool for several seconds while holding wire firmly.

8.

After soldering, ensure that terminals and wires do not

contact one another.

9.

If silicone oil is to be added, do so at this step with the

connector not yet attached to cover.  Tilt cover upward
and add 45-cc of oil from container.  The container (P/N
K21436) holds enough for 3 fills.

10.  Before  attaching  the  connector  to  the  cover,  rotate

connector  CW  two  turns.  This  will  bundle  the  wires
together, finishing with the notch up when viewed from
the outward side of the MS connector, and lead wires
down  for  Packard  connector  (see  MS  Connector  Pin
Orientation,  page  9).  Insert  connector  screws  and
torque to 8-10 in•lb (11-13 N•m).

11. With a VOM, check for proper coil resistance between

terminals A and B, and between C and D if PCP is a dual
coil.

© Danfoss, 2014-05 

11152452 • Rev AA • May 2014

5

Summary of Contents for MCV105C

Page 1: ...ly replaced in the field Single or dual coil torque motor FEATURES The standard EDC is a single coil one input to the torque motor Packard connector device The first option is a dual coil which allows two command sources to be compared at thetorquemotor theresultingsignalbeingthealgebraicsum between the two Connectors are the second connector option available Dual pilot coils are available with bo...

Page 2: ... drive the pilot to full stroke Table B SuggestedVoltageDrives below demonstratesthis relationship and lists the suggested voltage drives for two coil temperatures MAXIMUM CONTINUOUS VOLTAGE THAT WILL NOT DAMAGE THE DEVICE 6 0 Vdc 200 F 93 3 C dual coil 7 5 Vdc 200 F 93 3 C single coil 23 ohm 30 Vdc 200 F 93 3 C single coil 643 ohm COIL INDUCTANCE 0 085 Henries single coil 23 ohm 0 062 Henries A B...

Page 3: ...umber K21436 which includes instructions ITEM PART 1 MCV116A3102 1 PILOT STYLE 22 1 MCV116A3204 1 PILOT STYLE 23 1 MCV116A3101 1 PILOT STYLE 26 1 MCV116A3201 1 PILOT STYLE 27 1 MCV116A3501 1 PILOT STYLE 46 2 K13340 1 LINK COVER 3 K13341 1 COVER GASKET 4 9004101 1190 1 O RING 93 I D X 103 5 K07057 2 SOC HD CAP SCREW 1 4 20 X 5 8 6 K11615 1 HEX SEAL NUT 5 16 24 7 K04064 4 SOC HD CAP SCREW 10 32 X 5 ...

Page 4: ... Silicone Oil Kit 4000 cs 8 K04196 1 Connector Gasket 9 K08687 4 Connector Screw for MS 10 K01314 1 Connector MS 11 K08688 4 Connector Screw for Packard 12 K08106 1 Mating Electrical Connector MS 13 K08014 1 Feed Through Assy Cover Plate 14 K07533 1 Feed Through Assy 4 pin Packard W P 15 K03384 1 Mating Electrical Packard W P 16 K00829 2 O ring control port 17 K00830 1 O ring return port 18 K08573...

Page 5: ...s to 12 15 in lb 16 20 N m 6 Verify that wire to pin connections are correct before soldering wires Also ensure that the connector gasket see Table D Service Parts Item 3 page 4 is in place before soldering 7a For the MS style connector ensure that the cups have sufficient solder approximately level If additional solder is required place solder iron against the base of thecupandaddsolder Whilesold...

Page 6: ...DIA HOLES 002 DRILLED THROUGH 90 APART 5625 18 SAE STR THD O RING BOSS SYSTEM PRESSURE GAUGE PORT A 5625 18 SAE STR THDO RINGBOSS CHARGE PRESSURE GAUGEPORT 5625 18 SAE STR THD O RING BOSS SYSTEM PRESSURE GAUGE PORT B 273 05 10 75 9 65 0 38 72 64 2 86 101 60 4 0 78 23 3 08 79 76 3 14 CAUTION DO NOT ADJUST NULL ON PILOT STAGE USE SECOND STAGE NULL ADJUST DIMENSIONS Dimensions of the MCV105C EDC in m...

Page 7: ... the pilot a stand alone closed loop pressure control valve The second stage of the EDC uses a piston and rotary valve arrangementthatservestoseparatethenulldeadbandfrom the feedback giving both safety against null drift and quick dynamic response to command changes The second stage s null adjust is set with the modulating spring compressed to the equivalent of 12 psi which is the amountofdifferen...

Page 8: ...sed A and B for single coil devices Note device MS connector is not field replaceable Its mate is part number K08106 bag assembly MS3106E 14S 2S See MS Con nectorPinOrientation page9 forproperpinlocations With both designs phasing is such that a positive voltage on the Red wire Pin B will cause a pressure rise at the C2 port for single coil valves The mating Packard connector is part number K03383...

Page 9: ...Crimp location and distance from tang to third rib of Packard Weather Pack Connector Packard Weather Pack interlocked connector halves with parts identified Two wire connector shown CABLE SEALS SIDE B RED BLACK SHROUD CONNECTOR SIDE A DOUBLE PLUG SEAL TOWER CONNECTOR MOUNTING Danfoss Danfoss If there isamanual control mountedonthe pump it must be removed before the MCV105B is mounted To do so Danf...

Page 10: ...uce erratic results 5 Putthe2shortscrews 1 4 20x3 4 throughthebosses onthesideofthevalve Putthetwolongscrews 1 4 20 x 2 5 through the valve body See Dimensions page 6 Torquethefourscrews inacrosspatternstartingwith the bolt closest to the pilot to 10 11 ft lbs Note Impropertorqueingmaycausecontroltobindand produce erratic results 6 If needed install control orifices under both servo covers SLEEVE ...

Page 11: ...lure mode is likely to be one of the following six 1357 Location of one of the servo gauge ports on the pump WARNING Electrical actuation of the valve and or hydraulic jogging of the valve may cause pump output and movement by the driven machine Take precautions to ensure that no personnel are in a position to be injured by the machine if it should move TROUBLESHOOTING FAILURE MODES A NO PUMP OUTP...

Page 12: ...current drive is high enough jog the manual operator on the pilot If full output is attained replacethepilot Ifpumpoutputislowonbothsides ofnull thefiltermaybepluggedinthesecondstage Ifthepumpoutputisfullononesideandlowonthe other replace the pilot F PUMP NULL DEADBAND IS ASYMMETRICAL 1 Adjust the second stage null using the null adjust procedure described previously 2 Iftheproblempersistsandtheno...

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