Installation - Danfoss MCV109A Manual

INSTALLATION

A highly reliable connection between the swashplate and the
drag link is necessary for safe operation. An unreliable
connection may result in loss of feedback with a resulting loss
of control. Series 3X motors meet this requirement, but all
Series 2X units not already equipped with an EDC or Hydrau-
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 the motor.
These units have a clearance notch cast into the swashplate
that provides additional room for link movement. Series 3X
motors with Serial Numbers of less than 82-33-99999 may
not be fitted with the EDC without modification of the
swashplate by .
Prior to mounting any control on a motor, ensure that both the
control and the control feedback link are correct for the motor
as evidenced by the series number stamped on the link and
the part number labeled on the control body. See Table C
and Warning.
MOUNTING
Follow the procedure outlined below to attach the EDC to the
motor.
REMOVING THE OLD HARDWARE
1. Thoroughly clean all external surfaces of the motor and
control with steam or solvent. Blow dry.
2. Remove the existing control from the motor by removing
the nine hex head screws from the housing. Slip the pin
on the control linkage out of the end of the swashplate
drag link. See Swashplate Drag Link diagram.
3. Remove the case drain fitting from the side of the motor
on which the control was mounted.
4. Remove the E-ring from the inside end of the connecting
pin. Use caution not to drop the E-ring into the housing
during the removal. See Pin Connection diagram.
5. Remove the pin from the swashplate drag link and
swashplate through the case drain port using a magnet
or other tool. Remove the drag link. On some models
it may be necessary to hold the swashplate off neutral to
align it with the case drain hole.
Assembly diagram.
BLN-95-8985-1
TABLE C. THE FOLLOWING TABLE CORRELATES THE
MOTOR SERIES NUMBER WITH THE SERIES NUMBER
STAMPED ON THE SIDE OF THE CONTROL FEEDBACK
LINK PROTRUDING FROM THE CONTROL.
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1
Exercise care when placing the valve on a surface before
mounting on a transmission. Dropping or otherwise
forcefully setting the valve with the linkage down may
break the crosslink, resulting in a lack of response to
command.
SWASHPLATE DRAG LINK
See Swashplate
Swashplate Drag Link/Control Feedback Link
Connection Between Original Control and Motor.
8
SERIES LINK MARKING
20,
21, 22
23
24
25
26 26 (1 1/2 spacer)
27
33, 34, 36
WARNING
20 (1/4 spacer)
21, 22
23
24
25
27
33, 34, 36
1124B