E1, E2, F1, F2 Controls; Operation; Functional Description; Repair - Danfoss 51 Series Service Manual

Service Manual

E1, E2, F1, F2 Controls

Operation

Schematic diagram
T4
T5
U6
U7
T6
XB
XA
PCOR option
with brake
pressure defeat

Repair

32
Series 51 Two Position Controls Service Manual

Functional Description

The E* and F* two-position controls consist of a ported housing containing a cartridge style, 3-way, two-
position, solenoid valve. The control housing mounts to the multifunction block containing the double-
resolver spool.
The resolver spool takes high pressure (system A or system B) and routes it to the four-way valve as servo
supply, and sends low-loop pressure to the solenoid valve to operate the four-way valve. The solenoid
valve, when energized, sends pilot pressure (low loop pressure) to the end of the four-way valve, to shift
the motor's displacement.
E* controls use the standard logic sleeve. F* controls use the reverse logic sleeve. Optional orifices T1, T2,
T3, T7, and T8 control shift speeds. This table shows control logic, input voltage, and connector options
for each control type. E* and F* controls have the option of PCOR.
Control logic, voltage, and connector type
Type Sol. on
E 1 min.
2 min.
5 min.
F 1 max.
2 max.
T5
U6
U7
PCOR option
M8
without brake
pressure defeat Multifunction block

Disassembly

Solenoid valve (M1) is available as a complete assembly only.
1. Using a 7/8 inch wrench, remove the cartridge (M1) from the control housing.
11009442 • Rev CA • January 2015
Sol. off
max.
max.
max.
min.
min.
L2
X
A
T4
A1
B1
T6
L1
U5
B
E1 / E2
X X
M7
Volts Connector
12 DIN 46350
24 DIN 46350
12 Packard
12 DIN 46350
24 DIN 46350
M4 M3
X X
M1
X
max.
disp
T3
)( )(
T2
)(
T7
X3
T1
T8
)(
(M5)
X
M2
F1 / F2
P101 207E