Claas UNIWRAP Service Manual

UNIWRAP
Technical Systems
Hydraulic System
TIC UNIWRAP Hydraulic System

Contents

1 Hydraulic circuit diagram................................................5
2 Pre-conditions for use ................................................... 27
3 Valve block .....................................................................31
4 Individual components .................................................. 41
11/04 UNI-h 3
Hydraulic System UNIWRAP TIC
4 UNI-h 11/04
TIC UNIWRAP Hydraulic System
1

Hydraulic circuit diagram

1.1 Hydraulic circuit diagram up to serial no.: 72600130 ........................8
1.2 Hydraulic circuit diagram from machine no.: 72600131,
with tipping cradle service shut-off valve (631) ...............................12
1.3 Hydraulic circuit diagram from machine no.: 72600531,
with film clamping cutters flow divider (769)....................................16
1.4 Hydraulic circuit diagram from serial no.: 72601047, with valve combination (630, 706, 769),
without 3-stage restrictor (645) .......................................................20
1.5 Hydraulic circuit diagram from serial no.: 72601047, with valve combination (630, 706, 769),
with 3-stage restrictor (645) ............................................................24
11/04 UNI-h-Kap1 5
Hydraulic System UNIWRAP TIC
6 UNI-h-Kap1 11/04
- up to serial no.: 72600130
1.1
Hydraulic circuit diagram
Hydraulic System UNIWRAP TIC
1.1 Hydraulic circuit diagram up to serial no.: 72600130
Key to diagram:
1 Feed line 2 Return line 3 Valve block 3a Plate 4 Valve block 5 Valve block 6 Disc brake
234 Wrapping arm motor 235 Wrapping table motor
374 Film clamping cutters hydraulic cylinder 375 Tipping cradle hydraulic cylinder 376 Wrapping table hydraulic cylinder
406 Orifice plate Ø 0.8 mm 410 Orifice plate Ø 1.5 mm
630 Wrapping table flow control valve
706 Pressure relief valve 732-1 Non-return valve 732-2 Non-return valve 732-3 Non-return valve 732-4 Non-return valve 734 Lock-up valve unit 763 Input pressure balance 764 Pressure relief valve (left) 115 765 Pressure relief valve (right) 115 766 Lower brake valve 767 Wrapping arm motor flow controller 768 LS signal shuttle valves
Y77 Master valve solenoid valve Y133 Wrapping arm motor forward solenoid valve Y134 Wrapping arm motor reverse solenoid valve Y135 Lower tipping cradle solenoid valve Y136 Raise tipping cradle solenoid valve Y137 Lower wrapping table solenoid valve Y138 Raise wrapping table solenoid valve Y139 Open film cutters solenoid valve Y140 Close film cutters solenoid valve
+10
+10
bar
bar
8 UNI-h-Kap1 11/04
TIC UNIWRAP Hydraulic System
Description of function:
Orifice plate (406) Ø 0.8 mm
The orifice plate (406) Ø 0.8 mm avoids pressure build-up and
consequently uncontrolled movements of the wrapping arm motor (234).
Wrapping table flow control valve (630)
The wrapping table flow control valve supplies the hydraulic motor (235)
via output (A). This volume flow can be adjusted and changes the wrapping table motor / wrapping arm motor speed ratio and consequently the film layer overlaps.
Pressure relief valve (706) The pressure relief valve limits the pressure to 70 bar when lowering the
tipping cradle hydraulic cylinders.
Non-return valve (732-3) The non-return valve avoids faulty functions of the film clamping cutters
by building up pressure in the T line.
Input pressure balance (763)
The input pressure balance keeps the connection from P to T open when
no control unit is actuated in valve block 3. It is closed by LS pressure. The LS pressure is built up when the master valve (Y77-2) or a control unit in valve block 3 is actuated.
Pressure relief valve (764) The pressure relief valve limits the oil pressure to the wrapping arm motor
(234) and the wrapping table motor (drive) connected in series to
+10
115
bar.
Pressure relief valve (765) The pressure relief valve limits the oil pressure of the wrapping arm motor
(234) to 115
+10
bar when decelerating.
Lower brake valve (766) The non-return valves 732-1/ 732-2 and the lower brake valve (766)
decelerate the wrapping arm motor (234) hydraulically on both sides if the wrapping arm forward solenoid valve (Y133) is not energized.
Wrapping arm motor flow controller (767)
The flow controller keeps the volume flow to the wrapping arm motor
(234) constant. Maximum wrapping speed (approx. 20 l/min.) with SAM wrapping arm motor. Maximum wrapping speed (approx. 31 l/min.) with Danfoss wrapping arm motor.
LS signal shuttle valves (768)
When operating the control valves in parallel mode, the shuttle valves
allow sending the highest load pressure to the input pressure balance (763) in each case.
Master valve solenoid valve (Y77)
The master valve solenoid valve is actuated automatically when a hydraulic function is to be carried out on the baler. Now the pump flow is directed into the LS line so that the pressure that builds up closes the pressure balance (763).
11/04 UNI-h-Kap1 9
Hydraulic System UNIWRAP TIC
Description of function:
Wrapping arm forward solenoid valve (Y133)
The solenoid valve controls the wrapping arm hydraulic motor.
A wrapping arm motor flow controller 767 is provided in the volume flow input and keeps the volume flow constant. When the control unit is activated, this volume flow is pumped to the hydraulic motor (234) which drives the wrapping arm with 28 ... 30 rpm max. The flow controller may be accessed via the screw plug at the bottom of the control unit. The rotational speed of the wrapping arm of 27 rpm ensures that the wrapping process is shorter than the time required for producing the bale.
Wrapping arm reverse solenoid valve (Y134)
The solenoid valve changes the direction of oil flow to the wrapping arm
motor (234) and consequently its sense of rotation.
Lower tipping cradle
The solenoid valve lowers the tipping cradle.
solenoid valve (Y135)
Raise tipping cradle solenoid valve (Y136)
The solenoid valve raises the tipping cradle. The lock-up valve unit 734
avoids lowering of the raised tipping cradle.
Lower wrapping table solenoid valve (Y137)
The solenoid valve lowers the wrapping table. The lock-up valve unit 734
in the cylinder line avoids lowering of the loaded wrapping table.
Raise wrapping table
The solenoid valve raises the wrapping table.
solenoid valve (Y138)
Open film cutters solenoid valve (Y139)
The solenoid valve opens both film cutters.
The wrapping table raise solenoid coil (Y138) is actuated simultaneously with solenoid coils (Y139). This is necessary in order to build up pressure in the LS line to make the input pressure balance (763) close.
Close film cutters solenoid valve (Y140)
The solenoid valve closes both film cutters.
The wrapping table raise solenoid coil (Y138) is actuated simultaneously with solenoid coils (Y139). This is necessary in order to build up pressure in the LS line to make the input pressure balance (763) close.
10 UNI-h-Kap1 11/04
1.2
Hydraulic circuit diagram
- from machine no.: 72600131
- with tipping cradle service shut-off valve (631)
Hydraulic System UNIWRAP TIC
1.2 Hydraulic circuit diagram from machine no.: 72600131, with tipping cradle service shut-off valve (631)
Key to diagram::
1 Feed line 2 Return line 3 Valve block 3a Plate 4 Clamping cutters valve block 5 Wrapping arm motor valve block 6 Disc brake
234 Wrapping arm motor 235 Wrapping table motor
374 Film clamping cutters hydraulic cylinder 375 Tipping cradle hydraulic cylinder 376 Wrapping table hydraulic cylinder
406 Orifice plate Ø 0.8 mm 410 Orifice plate Ø 1.5 mm
630 Wrapping table flow control valve 631 Tipping cradle shut-off valve
706 Pressure relief valve 732-1 Non-return valve 732-2 Non-return valve 732-3 Non-return valve 732-4 Non-return valve 734 Lock-up valve unit 763 Input pressure balance 764 Pressure relief valve (left) 115 765 Pressure relief valve (right) 115 766 Lower brake valve 767 Wrapping arm motor flow controller 768 LS signal shuttle valves
Y77 Master valve solenoid valve Y133 Wrapping arm motor forward solenoid valve Y134 Wrapping arm motor reverse solenoid valve Y135 Lower tipping cradle solenoid valve Y136 Raise tipping cradle solenoid valve Y137 Lower wrapping table solenoid valve Y138 Raise wrapping table solenoid valve Y139 Open film cutters solenoid valve Y140 Close film cutters solenoid valve
+10
+10
bar
bar
12 UNI-h-Kap1 11/04
TIC UNIWRAP Hydraulic System
Description of function:
Orifice plate (406) Ø 0.8 mm
The orifice plate (406) Ø 0.8 mm avoids pressure build-up and
consequently uncontrolled movements of the wrapping arm motor (234).
Wrapping table flow control valve (630)
The wrapping table flow control valve supplies the hydraulic motor (235)
via output (A). This volume flow can be adjusted and changes the wrapping table motor / wrapping arm motor speed ratio and consequently the film layer overlaps.
Tipping cradle shut-off valve (631)
During service work, the tipping cradle shut-off valve shuts off the oil flow
from the hydraulic cylinders 375.
Pressure relief valve (706) The pressure relief valve limits the pressure to 70 bar when lowering the
tipping cradle hydraulic cylinders.
Non-return valve (732-3) The non-return valve avoids faulty functions of the film clamping cutters
by building up pressure in the T line.
Input pressure balance (763)
The input pressure balance keeps the connection from P to T open when
no control unit is actuated in valve block 3. It is closed by LS pressure. The LS pressure is built up when the master valve (Y77-2) or a control unit in valve block 3 is actuated.
Pressure relief valve (764) The pressure relief valve limits the oil pressure to the wrapping arm motor
(234) and the wrapping table motor (drive) connected in series to
+10
115
bar.
Pressure relief valve (765) The pressure relief valve limits the oil pressure of the wrapping arm motor
(234) to 115
+10
bar when decelerating.
Lower brake valve (766) The non-return valves 732-1/ 732-2 and the lower brake valve (766)
decelerate the wrapping arm motor (234) hydraulically on both sides if the wrapping arm forward solenoid valve (Y133) is not energized.
Wrapping arm motor flow controller (767)
The flow controller keeps the volume flow to the wrapping arm motor
(234) constant. Maximum wrapping speed (approx. 20 l/min.) with SAM wrapping arm motor. Maximum wrapping speed (approx. 31 l/min.) with Danfoss wrapping arm motor.
LS signal shuttle valves (768)
When operating the control valves in parallel mode, the shuttle valves
allow sending the highest load pressure to the input pressure balance (763) in each case.
Master valve solenoid valve (Y77)
The master valve solenoid valve is actuated automatically when a hydraulic function is to be carried out on the baler. Now the pump flow is directed into the LS line so that the pressure that builds up closes the pressure balance (763).
11/04 UNI-h-Kap1 13
Hydraulic System UNIWRAP TIC
Description of function:
Wrapping arm forward solenoid valve (Y133)
The solenoid valve controls the wrapping arm hydraulic motor.
A wrapping arm motor flow controller 767 is provided in the volume flow input and keeps the volume flow constant. When the control unit is activated, this volume flow is pumped to the hydraulic motor (234) which drives the wrapping arm with 28 ... 30 rpm max. The flow controller may be accessed via the screw plug at the bottom of the control unit. The rotational speed of the wrapping arm of 27 rpm ensures that the wrapping process is shorter than the time required for producing the bale.
Wrapping arm reverse solenoid valve (Y134)
The solenoid valve changes the direction of oil flow to the wrapping arm
motor (234) and consequently its sense of rotation.
Lower tipping cradle
The solenoid valve lowers the tipping cradle.
solenoid valve (Y135)
Raise tipping cradle solenoid valve (Y136)
The solenoid valve raises the tipping cradle. The lock-up valve unit 734
avoids lowering of the raised tipping cradle.
Lower wrapping table solenoid valve (Y137)
The solenoid valve lowers the wrapping table. The lock-up valve unit 734
in the cylinder line avoids lowering of the loaded wrapping table.
Raise wrapping table
The solenoid valve raises the wrapping table.
solenoid valve (Y138)
Open film cutters solenoid valve (Y139)
The solenoid valve opens both film cutters.
The wrapping table raise solenoid coil (Y138) is actuated simultaneously with solenoid coils (Y139). This is necessary in order to build up pressure in the LS line to make the input pressure balance (763) close.
Close film cutters solenoid valve (Y140)
The solenoid valve closes both film cutters.
The wrapping table raise solenoid coil (Y138) is actuated simultaneously with solenoid coils (Y139). This is necessary in order to build up pressure in the LS line to make the input pressure balance (763) close.
14 UNI-h-Kap1 11/04
1.3
Hydraulic circuit diagram
- from machine no.: 72600531
- with film clamping cutters flow divider (769)
Hydraulic System UNIWRAP TIC
1.3 Hydraulic circuit diagram from machine no.: 72600531, with film clamping cutters flow divider (769)
Key to diagram:
1 Feed line 2 Return line 3 Valve block 3a Plate 4 Clamping cutters valve block 5 Wrapping arm motor valve block 6 Disc brake
234 Wrapping arm motor 235 Wrapping table motor
374 Film clamping cutters hydraulic cylinder 375 Tipping cradle hydraulic cylinder 376 Wrapping table hydraulic cylinder
406 Orifice plate Ø 0.8 mm 410 Orifice plate Ø 1.5 mm
630 Wrapping table flow control valve 631 Tipping cradle shut-off valve
706 Pressure relief valve 732-1 Non-return valve 732-2 Non-return valve 732-3 Non-return valve 732-4 Non-return valve 734 Lock-up valve unit 763 Input pressure balance 764 Pressure relief valve (left) 115 765 Pressure relief valve (right) 766 Lower brake valve 767 Wrapping arm motor flow controller 768 LS signal shuttle valves 769 Film clamping cutters flow divider
Y77 Master valve solenoid valve Y133 Wrapping arm motor forward solenoid valve Y134 Wrapping arm motor reverse solenoid valve Y135 Lower tipping cradle solenoid valve Y136 Raise tipping cradle solenoid valve Y137 Lower wrapping table solenoid valve Y138 Raise wrapping table solenoid valve Y139 Open film cutters solenoid valve Y140 Close film cutters solenoid valve
+10
bar
16 UNI-h-Kap1 11/04
TIC UNIWRAP Hydraulic System
Description of function:
Orifice plate (406) Ø 0.8 mm
The orifice plate (406) Ø 0.8 mm avoids pressure build-up and
consequently uncontrolled movements of the wrapping arm motor (234).
Wrapping table flow control valve (630)
The wrapping table flow control valve supplies the hydraulic motor (235)
via output (A). This volume flow can be adjusted and changes the wrapping table motor / wrapping arm motor speed ratio and consequently the film layer overlaps.
Tipping cradle shut-off valve (631)
During service work, the tipping cradle shut-off valve shuts off the oil flow
from the hydraulic cylinders 375.
Pressure relief valve (706) The pressure relief valve limits the pressure to 70 bar when lowering the
tipping cradle hydraulic cylinders.
Non-return valve (732-3) The non-return valve avoids faulty functions of the film clamping cutters
by building up pressure in the T line.
Input pressure balance (763)
The input pressure balance keeps the connection from P to T open when
no control unit is actuated in valve block 3. It is closed by LS pressure. The LS pressure is built up when the master valve (Y77-2) or a control unit in valve block 3 is actuated.
Pressure relief valve (764) The pressure relief valve limits the oil pressure to the wrapping arm motor
(234) and the wrapping table motor (drive) connected in series to
+10
115
bar.
Pressure relief valve (765) The pressure relief valve limits the oil pressure of the wrapping arm motor
(234) to 115
+10
bar when decelerating.
Lower brake valve (766) The non-return valves 732-1/ 732-2 and the lower brake valve (766)
decelerate the wrapping arm motor (234) hydraulically on both sides if the wrapping arm forward solenoid valve (Y133) is not energized.
Wrapping arm motor flow controller (767)
The flow controller keeps the volume flow to the wrapping arm motor
(234) constant. Maximum wrapping speed (approx. 20 l/min.) with SAM wrapping arm motor. Maximum wrapping speed (approx. 31 l/min.) with Danfoss wrapping arm motor.
LS signal shuttle valves (768)
When operating the control valves in parallel mode, the shuttle valves
allow sending the highest load pressure to the input pressure balance (763) in each case.
Film clamping cutters flow divider (769)
The flow divider divides the oil flows for opening and closing the film
clamping cutters.
Master valve solenoid valve (Y77)
The master valve solenoid valve is actuated automatically when a hydraulic function is to be carried out on the baler. Now the pump flow is directed into the LS line so that the pressure that builds up closes the pressure balance (763).
11/04 UNI-h-Kap1 17
Hydraulic System UNIWRAP TIC
Description of function:
Wrapping arm forward solenoid valve (Y133)
The solenoid valve controls the wrapping arm hydraulic motor.
A wrapping arm motor flow controller 767 is provided in the volume flow input and keeps the volume flow constant. When the control unit is activated, this volume flow is pumped to the hydraulic motor (234) which drives the wrapping arm with 28 … 30 rpm max. The flow controller may be accessed via the screw plug at the bottom of the control unit. The rotational speed of the wrapping arm of 27 rpm ensures that the wrapping process is shorter than the time required for producing the bale.
Wrapping arm reverse solenoid valve (Y134)
The solenoid valve changes the direction of oil flow to the wrapping arm
motor (234) and consequently its sense of rotation.
Lower tipping cradle
The solenoid valve lowers the tipping cradle.
solenoid valve (Y135)
Raise tipping cradle solenoid valve (Y136)
The solenoid valve raises the tipping cradle. The lock-up valve unit 734
avoids lowering of the raised tipping cradle.
Lower wrapping table solenoid valve (Y137)
The solenoid valve lowers the wrapping table. The lock-up valve unit 734
in the cylinder line avoids lowering of the loaded wrapping table.
Raise wrapping table
The solenoid valve raises the wrapping table.
solenoid valve (Y138)
Open film cutters solenoid valve (Y139)
The solenoid valve opens both film cutters.
The wrapping table raise solenoid coil (Y138) is actuated simultaneously with solenoid coils (Y139). This is necessary in order to build up pressure in the LS line to make the input pressure balance (763) close.
Close film cutters solenoid valve (Y140)
The solenoid valve closes both film cutters.
The wrapping table raise solenoid coil (Y138) is actuated simultaneously with solenoid coils (Y139). This is necessary in order to build up pressure in the LS line to make the input pressure balance (763) close.
18 UNI-h-Kap1 11/04
1.4
Hydraulic circuit diagram
- from serial no.: 72601047
- with valve combination (630, 706, 769)
- without 3-stage restrictor (645)
Hydraulic System UNIWRAP TIC
1.4 Hydraulic circuit diagram from serial no.: 72601047, with valve combination (630, 706, 769), without 3-stage restrictor (645)
Key to diagram:
1 Feed line 2 Return line 3 Valve block 4 Valve block 5 Valve block 6 Disc brake 7 Valve combination 8 Manifold
234 Wrapping arm motor 235 Wrapping table motor
374 Film clamping cutters hydraulic cylinder 375 Tipping cradle hydraulic cylinder 376 Wrapping table hydraulic cylinder
406 Orifice plate Ø 0.8 mm 410 Orifice plate Ø 1.5 mm
630 Wrapping table flow control valve 631 Tipping cradle shut-off valve 634 System screw
706 Pressure relief valve 732 Non-return valve 734 Lock-up valve unit 763 Input pressure balance 764 Pressure relief valve (left) 115 765 Pressure relief valve (right) 766 Lower brake valve 767 Wrapping arm motor flow controller 768 LS signal shuttle valves 769 Film clamping cutters flow divider
Y77 Master valve solenoid valve Y133 Wrapping arm motor forward solenoid valve Y134 Wrapping arm motor reverse solenoid valve Y135 Lower tipping cradle solenoid valve Y136 Raise tipping cradle solenoid valve Y137 Lower wrapping table solenoid valve Y138 Raise wrapping table solenoid valve Y139 Open film cutters solenoid valve Y140 Close film cutters solenoid valve
+10
bar
20 UNI-h-Kap1 11/04
TIC UNIWRAP Hydraulic System
Description of function:
Orifice plate (406) Ø 0.8 mm
The orifice plate (406) Ø 0.8 mm avoids pressure build-up and
consequently uncontrolled movements of the wrapping arm motor (234).
Wrapping table flow control valve (630)
The wrapping table flow control valve supplies the hydraulic motor (235)
via output (A). This volume flow can be adjusted and changes the wrapping table motor / wrapping arm motor speed ratio and consequently the film layer overlaps.
Tipping cradle shut-off valve (631)
During service work, the tipping cradle shut-off valve shuts off the oil flow
from the hydraulic cylinders 375.
Pressure relief valve (706) The pressure relief valve limits the pressure to 70 bar when lowering the
tipping cradle hydraulic cylinders.
Non-return valve (732-3) The non-return valve avoids faulty functions of the film clamping cutters
by building up pressure in the T line.
Input pressure balance (763)
The input pressure balance keeps the connection from P to T open when
no control unit is actuated in valve block 3. It is closed by LS pressure. The LS pressure is built up when the master valve (Y77-2) or a control unit in valve block 3 is actuated.
Pressure relief valve (764) The pressure relief valve limits the oil pressure to the wrapping arm motor
(234) and the wrapping table motor (drive) connected in series to
+10
115
bar.
Pressure relief valve (765) The pressure relief valve limits the oil pressure of the wrapping arm motor
(234) when decelerating.
Lower brake valve (766) The non-return valves 732-1/ 732-2 and the lower brake valve (766)
decelerate the wrapping arm motor (234) hydraulically on both sides if the wrapping arm forward solenoid valve (Y133) is not energized.
Wrapping arm motor flow controller (767)
The flow controller keeps the volume flow to the wrapping arm motor
(234) constant. Maximum wrapping speed (approx. 20 l/min.) with SAM wrapping arm motor. Maximum wrapping speed (approx. 31 l/min.) with Danfoss wrapping arm motor.
LS signal shuttle valves (768)
When operating the control valves in parallel mode, the shuttle valves
allow sending the highest load pressure to the input pressure balance (763) in each case.
Film clamping cutters flow divider (769)
The flow divider divides the oil flows for opening and closing the film
clamping cutters.
Master valve solenoid valve Y77
The master valve solenoid valve is actuated automatically when a hydraulic function is to be carried out on the baler. Now the pump flow is directed into the LS line so that the pressure that builds up closes the pressure balance (763).
11/04 UNI-h-Kap1 21
Hydraulic System UNIWRAP TIC
Description of function:
Wrapping arm forward solenoid valve (Y133)
The solenoid valve controls the wrapping arm hydraulic motor.
A wrapping arm motor flow controller (767) is provided in the volume flow input and keeps the volume flow constant. When the control unit is activated, this volume flow is pumped to the hydraulic motor (234) which drives the wrapping arm with 28 … 30 rpm max. The flow controller may be accessed via the screw plug at the bottom of the control unit. The rotational speed of the wrapping arm of 27 rpm ensures that the wrapping process is shorter than the time required for producing the bale.
Wrapping arm reverse solenoid valve (Y134)
The solenoid valve changes the direction of oil flow to the wrapping arm
motor (234) and consequently its sense of rotation.
Lower tipping cradle
The solenoid valve lowers the tipping cradle.
solenoid valve (Y135)
Raise tipping cradle solenoid valve (Y136)
The solenoid valve raises the tipping cradle. The lock-up valve unit (734)
avoids lowering of the raised tipping cradle.
Lower wrapping table solenoid valve (Y137)
The solenoid valve lowers the wrapping table. The lock-up valve unit
(734) in the cylinder line avoids lowering of the loaded wrapping table.
Raise wrapping table
The solenoid valve raises the wrapping table.
solenoid valve (Y138)
Open film cutters solenoid valve (Y139)
The solenoid valve opens both film cutters.
The wrapping table raise solenoid coil (Y138) is actuated simultaneously with solenoid coils (Y139). This is necessary in order to build up pressure in the LS line to make the input pressure balance (763) close.
Close film cutters solenoid valve (Y140)
The solenoid valve closes both film cutters.
The wrapping table raise solenoid coil (Y138) is actuated simultaneously with solenoid coils (Y139). This is necessary in order to build up pressure in the LS line to make the input pressure balance (763) close.
22 UNI-h-Kap1 11/04
1.5
Hydraulic circuit diagram
- from serial no.: 72601047
- with valve combination (630, 706, 769)
- with 3-stage restrictor (645)
Hydraulic System UNIWRAP TIC
1.5 Hydraulic circuit diagram from serial no.: 72601047, with valve combination (630, 706, 769), with 3-stage restrictor (645)
Key to diagram:
1 Feed line 2 Return line 3 Valve block 4 Valve block 5 Valve block 6 Disc brake 7 Valve combination 8 Manifold
234 Wrapping arm motor 235 Wrapping table motor
374 Film clamping cutters hydraulic cylinder 375 Tipping cradle hydraulic cylinder 376 Wrapping table hydraulic cylinder
406 Orifice plate Ø 0.8 mm 410 Orifice plate Ø 1.5 mm
630 Wrapping table flow control valve 631 Tipping cradle shut-off valve 634 System screw 645 3-stage restrictor
706 Pressure relief valve 732 Non-return valve 734 Lock-up valve unit 763 Input pressure balance 764 Pressure relief valve (left) 115
+10
bar 765 Pressure relief valve (right) 766 Lower brake valve 767 Wrapping arm motor flow controller 768 LS signal shuttle valves 769 Film clamping cutters flow divider
Y77 Master valve solenoid valve Y133 Wrapping arm motor forward solenoid valve Y134 Wrapping arm motor reverse solenoid valve Y135 Lower tipping cradle solenoid valve Y136 Raise tipping cradle solenoid valve Y137 Lower wrapping table solenoid valve Y138 Raise wrapping table solenoid valve Y139 Open film cutters solenoid valve Y140 Close film cutters solenoid valve
24 UNI-h-Kap1 11/04
TIC UNIWRAP Hydraulic System
Description of function:
Orifice plate (406) Ø 0.8 mm
The orifice plate (406) Ø 0.8 mm avoids pressure build-up and
consequently uncontrolled movements of the wrapping arm motor (234).
Wrapping table flow control valve (630)
The wrapping table flow control valve supplies the hydraulic motor (235)
via output (A). This volume flow can be adjusted and changes the wrapping table motor / wrapping arm motor speed ratio and consequently the film layer overlaps.
Tipping cradle shut-off valve (631)
During service work, the tipping cradle shut-off valve shuts off the oil flow
from the hydraulic cylinders 375.
Pressure relief valve (706) The pressure relief valve limits the pressure to 70 bar when lowering the
tipping cradle hydraulic cylinders.
Non-return valve (732-3) The non-return valve avoids faulty functions of the film clamping cutters
by building up pressure in the T line.
Input pressure balance (763)
The input pressure balance keeps the connection from P to T open when
no control unit is actuated in valve block 3. It is closed by LS pressure. The LS pressure is built up when the master valve (Y77-2) or a control unit in valve block 3 is actuated.
Pressure relief valve (764) The pressure relief valve limits the oil pressure to the wrapping arm motor
(234) and the wrapping table motor (drive) connected in series to
+10
115
bar.
Pressure relief valve (765) The pressure relief valve limits the oil pressure of the wrapping arm motor
(234) when decelerating.
Lower brake valve (766) The non-return valves 732-1/ 732-2 and the lower brake valve (766)
decelerate the wrapping arm motor (234) hydraulically on both sides if the wrapping arm forward solenoid valve (Y133) is not energized.
Wrapping arm motor flow controller (767)
The flow controller keeps the volume flow to the wrapping arm motor
(234) constant. Maximum wrapping speed (approx. 20 l/min.) with SAM wrapping arm motor. Maximum wrapping speed (approx. 31 l/min.) with Danfoss wrapping arm motor.
LS signal shuttle valves (768)
When operating the control valves in parallel mode, the shuttle valves
allow sending the highest load pressure to the input pressure balance (763) in each case.
Film clamping cutters flow divider (769)
The flow divider divides the oil flows for opening and closing the film
clamping cutters.
Master valve solenoid valve (Y77)
The master valve solenoid valve is actuated automatically when a hydraulic function is to be carried out on the baler. Now the pump flow is directed into the LS line so that the pressure that builds up closes the pressure balance (763).
11/04 UNI-h-Kap1 25
Hydraulic System UNIWRAP TIC
Description of function:
Wrapping arm forward solenoid valve (Y133)
The solenoid valve controls the wrapping arm hydraulic motor.
A wrapping arm motor flow controller (767) is provided in the volume flow input and keeps the volume flow constant. When the control unit is activated, this volume flow is pumped to the hydraulic motor (234) which drives the wrapping arm with 28 … 30 rpm max. The flow controller may be accessed via the screw plug at the bottom of the control unit. The rotational speed of the wrapping arm of 27 rpm ensures that the wrapping process is shorter than the time required for producing the bale.
Wrapping arm reverse solenoid valve (Y134)
The solenoid valve changes the direction of oil flow to the wrapping arm
motor (234) and consequently its sense of rotation.
Lower tipping cradle
The solenoid valve lowers the tipping cradle.
solenoid valve (Y135)
Raise tipping cradle solenoid valve (Y136)
The solenoid valve raises the tipping cradle. The lock-up valve unit (734)
avoids lowering of the raised tipping cradle.
Lower wrapping table solenoid valve (Y137)
The solenoid valve lowers the wrapping table. The lock-up valve unit
(734) in the cylinder line avoids lowering of the loaded wrapping table.
Raise wrapping table
The solenoid valve raises the wrapping table.
solenoid valve (Y138)
Open film cutters solenoid valve (Y139)
The solenoid valve opens both film cutters.
The wrapping table raise solenoid coil (Y138) is actuated simultaneously with solenoid coils (Y139). This is necessary in order to build up pressure in the LS line to make the input pressure balance (763) close.
Close film cutters solenoid valve (Y140)
The solenoid valve closes both film cutters.
The wrapping table raise solenoid coil (Y138) is actuated simultaneously with solenoid coils (Y139). This is necessary in order to build up pressure in the LS line to make the input pressure balance (763) close.
3-stage restrictor (645) To enable raising and lowering the wrapping table at different speeds, the
respective speed may be preselected using the 3-stage restrictor, see chapter 4-15.
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TIC UNIWRAP Hydraulic System
2

Pre-conditions for use

2.1 Blocking the master valve (Y77) .....................................................28
2.2 Connection to tractor hydraulic system...........................................29
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Hydraulic System UNIWRAP TIC
2.1 Blocking the master valve (Y77) From serial no.
Up to machine no.
1 Circulation shut-off valve solenoid coil (Y77-1) Caution: The screw must be turned in. The circulation shut-off valve is now permanently shut off. 2 Hand lever. Horizontally (to the outside) = Working position Vertically (to the bottom) = The tailgate is safeguarded in open position (for service work) P Feed line to UNIWRAP. T Return line from UNIWRAP.
28 UNI-h-Kap1 11/04
1 Tee 2 Circulation shut-off valve solenoid coil (Y77-1) P Feed line to UNIWRAP. T Return line from UNIWRAP.
TIC UNIWRAP Hydraulic System

2.2 Connection to tractor hydraulic system

Description of function: 1/2
The attachment can be connected to any tractor hydraulic system
available on the market.
Connection to tractors with constant-flow hydraulic system
The quick release coupling 1 is connected to a control unit port of the
tractor with adjustable oil flow. This control unit provides oil supply for the attachment and is adjusted to a constant volume flow of Q
The system screw 634 is turned out up to the stop so that the input pressure balance 763 is operative.
The quick release coupling 2 is in general connected to the pressureless return line T of the tractor. If a pressureless return line is not allowed in continuous operation (e.g. because lubrication of the tractor gearbox is not guaranteed), a double­acting control unit can be used for supplying oil to the attachment. In this case, the quick release coupling 1 is connected to port A (feed) and quick release coupling 2 to port B (return) of the corresponding tractor control valve.
Adjust the volume flow to Q tractor's Operating Manual (e.g. "Continuous operation of hydraulic motors").
The LS connection (LS, working hydraulics signal) is not used here.
If the tractor is not provided with a flow-adjustable control unit, the volume flow must not exceed 35 to 50 l/min.
Connection to tractors with constant-pressure hydraulic system
The quick release coupling 1 is connected to a control unit port of the
tractor with adjustable oil flow. This control unit provides oil supply for the attachment and is adjusted to an oil flow of Q
= 35 to 50 l/min.
max
The system screw 634 is turned in up to the stop so that the input pressure balance 763 is blocked. The tractor's hydraulic pump is shut down when the system pressure has been reached.
The quick release coupling 2 is connected to port T (pressureless return line) of the tractor.
The LS connection (LS, working hydraulics signal) is not used here.
= 35 to 50 l/min.
max
= 35 to 50 l/min; please refer also to the
max
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Hydraulic System UNIWRAP TIC
Description of function: 2/2
Connection to tractors with load-sensing system and a Power Beyond port
Test points/characteristics When no function is active on the attachment, the attachment must not
Connection to tractors with load-sensing system without a Power Beyond port
The quick release coupling 1 is connected directly to the pump via the
Power Beyond port P.
The quick release coupling 2 is connected to port T (pressureless return line) of the tractor.
Here the LS connection (LS, working hydraulics signal) is connected with the LS signal port of the tractor (the kit is available from the spare parts department).
The system screw 634 is turned in up to the stop so that the input pressure balance 763 is blocked. The tractor's hydraulic pump regulates as a function of the attachment's load signal.
load the tractor hydraulically. (The tractor engine speed must not be reduced). The allowed temperature of the tractor's hydraulic system must not be exceeded; see also the Operator's Manual of the tractor.
The quick release coupling 1 is connected to a control unit port of the
tractor with adjustable oil flow. This control unit provides oil supply for the attachment and is adjusted to a constant volume flow of Q
= 35 to 50 l/min.
max
The system screw 634 is turned out up to the stop so that the input pressure balance 763 is operative.
The quick release coupling 2 is in general connected to the pressureless return line T of the tractor. If a pressureless return line is not allowed in continuous operation (e.g. because lubrication of the tractor gearbox is not guaranteed), a double­acting control unit can be used for supplying oil to the attachment. In this case, the quick release coupling 1 is connected to port A (feed) and quick release coupling 2 to port B (return) of the corresponding tractor control valve.
Adjust the volume flow to Q
= 35 to 50 l/min; please refer also to the
max
tractor's Operating Manual (e.g. "Continuous operation of hydraulic motors").
The LS connection (LS, working hydraulics signal) is not used here.
If the tractor is not provided with a flow-adjustable control unit, the volume flow must not exceed 35 to 50 l/min.
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