5-30
1. STEERING UNIT
STRUCTURE
1)
1
Dust seal
2
Housing, spool, sleeve
3
Ball
4
Thread bushing
5 O-ring
7
Bearing assembly
8 Ring
9 Cross pin
11 Cardan shaft
12 Set of springs
13 O-ring
14 Distributor plate
15 Gearwheel set
17 End cover
18 Washer
20 Screw with pin
21 Screw
GROUP 4 DISASSEMBLY AND ASSEMBLY
1
5
3
4
2
7
8
9
12
21
20
18
17
13
15
14
13
11
7607SE10
TOOLS
Holding tool + Guide ring
5-31
2)
(1)
Assembly tool for O-ring and kin-ring.
(2)
Assembly tool for lip seal.
(3)
Assembly tool for cardan shaft.
(4)
7607SE08
7607SE09
(780-3A) 5-69(3)
(780-3A) 5-69(4)
5-32
Assembly tool for dust seal.
(5)
Torque wrench 0~7.1kgf m
(0~54.4lbf
ft)
13mm socket spanner
6, 8mm and 12mm hexagon sockets
12mm screwdriver
2mm screwdriver
13mm ring spanner
6, 8 and 12mm hexagon socket spanners
Plastic hammer
Tweezers
(6)
(780-3A) 5-70(1)
(780-3A) 5-70(2)
5-33
TIGHTENING TORQUE AND HYDRAULIC CONNECTIONS
Hydraulic connections
3)
(1)
Tightening torque
(2)
L : Left port
R : Right port
T : Tank
P : Pump
Screwed
connection
1/4 BSP.F
3/8 BSP.F
1/2 BSP.F
7/16-20 UNF
3/4-16 UNF
M 12 1.5
M 18 1.5
M 22 1.5
4.1(29.7)
6.1(44.1)
10.2(73.8)
-
-
4.1(29.7)
7.1(51.4)
10.2(73.8)
2.0(14.5)
2.0(14.5)
3.1(22.4)
2.0(14.5)
6.1(44.1)
2.0(14.5)
2.0(14.5)
3.1(22.4)
3.1(22.4)
5.1(36.9)
8.2(59.3)
-
-
3.1(22.4)
5.1(36.9)
8.2(59.3)
-
-
-
-
-
2.0(14.5)
5.1(36.9)
7.1(51.4)
With cutting
edge
With copper
washer
With aluminum
washer
With O - ring
Max. tightening torque [ kgf m(lbf
ft) ]
T L P R
(780-3A) 5-71
5-34
DISASSEMBLY
Disassemble steering column from
steering unit and place the steering unit in
the holding tool.
Screw out the screws in the end cover(6-
off plus one special screw).
4)
(1)
Remove the end cover, sideways.
(2)
Lift the gearwheel set (With spacer if
fitted) off the unit.
Take out the two O-rings.
(3)
Remove cardan shaft.
(4)
(780-3A) 5-72(1)
(780-3A) 5-72(2)
(780-3A) 5-72(3)
(780-3A) 5-72(4)
5-35
Remove distributor plate.
(5)
Screw out the threaded bush over the
check valve.
(6)
Remove O-ring.
(7)
Take care to keep the cross pin in