Danfoss MCV108C Installation guide

DESCRIPTION

The MCV108C Variable Pump Hydraulic Displacement Con­trol is a single stage hydraulic pump stroke control using
mechanical feedback to establish closed loop swashplate
angle control of Danfoss 46 cc medium duty pumps.

The MCV108C uses a differential hydraulic input pressure to
drive its piston and rotary valve arrangement and port oil to
the pump servo cylinders. The rotary spool configuration
allows a null deadband (for machine safety) in the pump's
output while maintaining optimum dynamic response to
control commands.

FEATURES

MCV108C

Hydraulic Displacement Control-PV

BLN-95-8994-3 Issued: August 1999

• Servo control deadband independent of signal null
deadband: offers safety combined with accurate and re­sponsive control.

• Withstands rugged environmental testing.

ORDERING INFORMATION

Order your HDC-PV by choosing the input pressure from the
control source using the information in Table A.

TABLE A. INFORMATION NECESSARY TO SPECIFY
THE HDC-PV.

MCV108C30 XX

STANDARD CASTING

PRESSURE RANGE

MCV108C replaces MCV108A and MCV108B.

• Minimum long term shift.

• Configured to accept most hydraulic input signals.

INPUT PRESSURE RANGE DESCRIPTION

11 19-170 psid nominal

14 44-200 psid nominal

15 70-220 psid nominal

Order MCV108s factory installed on pumps from
Danfoss Ames, Iowa or as a separate component from
Danfoss Minneapolis, Minnesota.

SPARE PARTS

Danfoss provides spare parts for the MCV108C.
See the Spare Parts drawing.

TECHNICAL DATA

OPERATING CHARGE PRESSURE

150-500 PSI above case pressure

OIL VISCOSITY

40-6000 SSU

FILTRATION

The system hydraulics will have a filtration rating of beta
sub 10 = 2 or better.

© Danfoss, 2013-09 BLN-95-8994-3 1

FLUID TEMPERATURE

The valve will be functional and undamaged at oil

temperatures of -40° to 121° C (-40° to 250° F).

The valve will meet performance specifications with a

fluid temperature of 21° to 82° C (70° to 180° F).

FLUID

Automatic transmission fluid or hydraulic oil such as
Mobil DTE 24 or equivalent.

TECHNICAL DATA (continued)

THRESHOLD

19±7 psi/side (38±14 psi total) (Model 01)
44±14 psi/side (88±28 psi total) (Model 04)
70±10 psi/side (140±20 psi total) (Model 05)

RATED MODULATING PRESSURE

170±16 psi (Model 01)
200±20 psi (Model 04)
220±20 psi (Model 05)

SPARE PARTS

SENSITIVITY

A 1% of modulating range change in input delta pressure
will cause a detectable output change.

MAXIMUM HYSTERESIS

25 psi when cycled at .01 Hz

NEUTRAL LEAKAGE

.10 gpm maximum across the valve with oil of 145-160

SUS at 100° F.

ITEM PART

NUMBER NUMBER QTY DESCRIPTION

1 K13340 1 LINK COVER
2 K13341 1 COVER GASKET
3 K07006 2 O-RING (.49 I.D. X .07)
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 NUT (5/16 - 24)
7 K10057 1 SOCKET SET SCREW (5/16 - 24 X .875)
8 K08131 1 NULL ADJUST GASKET

9 K00944 1 NULL ADJUST COVER
10 K09305 4 SOC. HD CAP SCREW (10 - 32 X .31)
11 K08388 1 SEAL WASHER
12 9009625-0163 1 WASHER *
13 K22539 1 SLEEVE WITH SNAP RING

** KK05602 1 MOUNTING HARDWARE BAG ASSY

*** KK05601 1 MOUNTING HARDWARE BAG ASSY

* Purchase from Danfoss Ames, Iowa
** Bag assembly includes items 4, 13 and mounting screws
*** Bag assembly for MCV108A and MCV108B

BLN-95-8994-3

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1452B