Tadano TT-800XXL1, Service Manual

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B-5
B-5
Hydraulic Pilot Control Valve (Elevating, Telescoping, Winch)
30
W 1 34-0270E
Overload relief valve
30 29 5 2 4 3 22 2 1 23 24 1
27,26,25, 1 3
6 1 9,20 1 8 1 7 28 1 4 1 6 1 5
7 9 1 2,25,26,27
11 1 0
1 9,20
8
F-F (Telescoping)
IW 1 34-0270E03
1 .Telescoping selector valve
body
2.Spool (telescoping)
3.Flow control valve
(telescoping)
4.Steel ball
5.Hex. socket set screw
6.O-ring
7.Spring seat
8.Return spring
9.Return spring
1 0.Spring seat
11 .Spool end
1 2.Pilot cover
1 3.Pilot cover
1 4.Steel ball
1 5.Plug (shuttle valve)
1 6.O-ring
1 7.Orifice
1 8.Spring (flow control valve)
1 9.Plug
20.O-ring
2
1 .Check valve
22.Spring (check valve)
23.Plug (check valve)
24.O-ring
25.Hex. socket head bolt
26.Plain washer
27.Spring washer
28.Plug
29.Plug
30.O-ring
Thread size and tightening torque
Tightening torque
Thread Thread size
N-m ft-lbf
Overload relief valve (Telescoping) M27× 1 .5 77 - 88 58 - 65
5*
1
M8 1 2 - 1 4 8.5 - 1 0
11 *
1
- 1 8 - 20 1 3 - 1 4
1 5*
1
- 1 8 - 20 1 3 - 1 4
1 7*
2
M6 5 - 6 3.5 - 4.5
1 9 M33 98 - 11 8 72 - 87
23 - 78.5 - 88.3 58 - 65
25 M8 27.5 - 29.4 20 - 22
28 - 1 0 - 1 2 7 - 9
29 G3/4 78.5 – 88.3 58 - 65
* 1 : Apply LOCTITE 242 (thread locking agent) to threaded sections.
*2: Apply LOCTITE 270 (thread locking agent) to threaded sections.
Telescoping selector valve