Danfoss MCV109A Manual Download Page 10

Page: 10 / 11

PARTS LOCATION DRAWING

Location of Parts When Installing a New Link and Ball Assembly. Separate
Assembly Parts Shown for Information Only; Do Not Attempt to Disassemble.

1858

SWASHPLATE FEEDBACK
SHAFT HOLE

RETAINING
RING

BUSHING

CROSSLINK
BALL
CAVITY

OPTIONAL ORIFICES (2)

LINKAGE
ASSEMBLY

1237B

MOTOR NEUTRAL ADJUSTMENT

Each MCV109 is factory calibrated so that the motor will

begin to destroke from 18

at the specified threshold input

current (see Technical Data section) to 6

which is full

destroke. This setting should not require adjustment.

If for some reason adjustment of neutral is necessary, a turn

of the null adjustment screw will vary the current/swashplate

angle curve (see Performance Curve diagram) vertically. A

clockwise turn will reduce the angle at which the swashplate

begins to destroke from 18

to a smaller angle. Physical

stops prevent the motor from destroking below 6

. A counter-

clockwise turn increases the fully-destroked angle above 6

Physical stops prevent the swashplate from exceeding 18

MOTOR THRESHOLD ADJUSTMENT

Use the following procedure to bring the hydraulic motor to a

threshold setting. The procedure describes "stages" of the

transmission, so that the motor starts to destroke just as the

pump reaches full stroke. This ensures a smooth, continuous

rise in motor shaft speed as command increases.

If a tachometer is unavailable, or if for some other reason the

following procedure is impractical, similar results can be

obtained by running the machine at different MCV109A

threshold adjustments. There should be no "dead spots" in

which increased command gives no increased speed. Nor

should there be spots in which increased command gives a

faster rise in speed than at high and low command extremes.

1. Disconnect the wires connecting the EDC pilot of the

MCV109 EDC-MV on the motor.

2. Install a mechanical or photoelectric tachometer on the

output shaft of the hydraulic motor.

3. Run the EDC electrical (or HDC-PV hydraulic) com-

mand source to maximum.

4. Slowly reduce the command source until the motor shaft

starts to decrease speed as shown by the tachometer.

This point represents full pump output. Note the RPM

indication level on the tachometer. Note the command

source position and the engine speed.

5. Reconnect the wires to the EDC-MV. Re-start the hydro-

static transmission. Using a 9/16-inch wrench, loosen

the hex lock nut on the null adjustment screw.

6. Using a 3/16 inch internal hex wrench, slowly turn the

null adjustment screw counterclockwise until the ta-

chometer indicates the full pump output from Step 4.

(Note: Clockwise null adjust rotation increases shaft

output speed.) Then turn the screw clockwise until shaft

speed just starts to increase.

7. Hold the adjustment screw and securely tighten the hex

lock nut on the adjustment screw to 14-18 foot-pounds.

8. Run the system briefly to ensure that it operates propor-

tionally. Swashplate movement can be verified by watch-

ing movement of the swashplate feedback shaft, shown

in Parts Location Drawing.

123456789012345678901234567890121234567890123

WARNING

To adjust neutral requires operating the pump. Take the

necessary safety precautions such as having unneces-

sary personnel stand away from the machine. Maximum

system pressure may occur upon start up, and the

machine may move. Ensure that the operator is not in

a position to be injured should the machine move.

Summary of Contents for MCV109A

Page 1: ... and second stages can be individually replaced Swashplate movement can be visually detected Single or dual coil torque motor ORDERING INFORMATION MCV109s are ordered for the particular motor on which they are to be mounted Link Installation Kits as ordered in the table below include orifices retaining ring drag link spacer plate swashplate pin link and ball assembly hex screws O rings and gaskets...

Page 2: ...K03377 Device Connector 2 Pin Unassembled 15 K07163 Spacer Size 20 K03378 Device Connector 4 Pin Unassembled 16 K07164 Spacer Size 26 3 K01314 Device MS Connector 17 K07128 3 Port Screens 4 K08106 Mating MS Connector 90 18 K07136 2 052 Orifices 5 K07055 10 32 X 5 8 Socket Head Cap Screw 19 K07006 3 O Ring For Ports 6 K01291 2 Plugs 20 K07182 EDC Gasket 7 K07612 Filter Assembly 21 K07160 Linkage Bu...

Page 3: ...90123 123456789012345678901234567890121234567890123 WARNING When using a pulse width modulated valve driver do not use a carrier frequency between 200 and 600 Hz If these frequencies cannot be avoided consult the fac tory Do not use a pulse current of more than 120 of that required for full output Failure to meet the above conditions can cause severe damage to the valve which will result in improp...

Page 4: ...44 A B A B C D A B C D A B C D Single coil 140 mA with 3 3 Vdc input at full destroke Using one of the two dual coils 185 mA with 2 8 Vdc C D or 3 6 Vdc A B input at full destroke Dual coils in series 72 mA with 4 4 Vdc input at full destroke Dual coils in parallel 185 mA with 1 4 Vdc input at full destroke V GROUND MCH CONTROL HANDLE MCV104 EDC PV MV MCV109 EDC A B A B SWASHPLATE ANGLE DEGREES OU...

Page 5: ... the flapper back towards null When the torque output from the motor equals the torque output from the pressure feedback the pilot system is in equilibrium It is this pressure feedback that makes the pilot a stand alone closed loop pressure control valve The second stage s null adjust is set with the modulating spring compressed to the equivalent of 95 psi which is the amount of differential press...

Page 6: ...y HUMIDITY After being placed in a controlled atmosphere of 95 humidity at 49 C 120 F for 10 days the EDC will perform within specification limits DIMENSIONS See Dimension drawing WIRING Twowiringstylesareavailable MSandPackardconnectors The MS connector is Part Number K01314 MS3102C14S 2P and has four pins only two of which are used A and B for single coil devices See Wiring Schemes diagram for p...

Page 7: ...rs See Distance Packard Connector diagram 6 Manually insert the assembled wires into the back end large hole of the plastic housing Push until the wire detents with an audible click then pull back slightly to ensure proper seating Observe the proper phasing of the wires when installing black wire to A hole red to B black to C and red to D Terminals may be removed from the connector bodies with a P...

Page 8: ...rau lic Displacement Control HDC must be retrofitted with the appropriate drag link press fit pin and retaining ring replac ing the slip fit headless pin and E rings used to attach the original drag link Series 20 and 26 models require a spacer plate between the control and the motor housing Series 3X motors with Serial Number of 82 34 00000 or greater will accept the EDC without modification of t...

Page 9: ...e the bushing over the shaft Torque to the body 10 15 foot pounds so that the feedback shaft extends through the bushing D Install the retaining ring in the groove on the shaft 2 Align one end of the replacement swashplate drag link with the holes in the swashplate link arms 3 Insert the press fit pin through the case drain port to trap thedraglinkintheswashplateclevis Itwillbenecessary to tap the...

Page 10: ...high and low command extremes 1 Disconnect the wires connecting the EDC pilot of the MCV109 EDC MV on the motor 2 Install a mechanical or photoelectric tachometer on the output shaft of the hydraulic motor 3 Run the EDC electrical or HDC PV hydraulic com mand source to maximum 4 Slowlyreducethecommandsourceuntilthemotorshaft starts to decrease speed as shown by the tachometer This point represents...

Page 11: ...n need of repair include a description of the problem a copy of the purchase order and your name address and telephone number RETURN TO Danfoss US Company Return Goods Department 3500 Annapolis Lane North Minneapolis Minnesota 55447 EUROPE ORDER FROM Danfoss Neumünster GmbH Co Customer Service Department Krokamp 35 Postfach 2460 D 24531 Neumünster Germany Telephone 49 4321 8710 Fax 49 4321 871 284...

Search results

Summary of Contents for MCV109A

Reviews:

Danfoss MCV109A, Manual, Page: 10 / 11

Search results

Summary of Contents for MCV109A

Reviews: