Tadano TT-800XXL1, Service Manual

Page: 108 / 267

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Telescoping System
Contents
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Telescoping System
1 . General..................................................... 1
1 . 1 Telescoping cylinder ................................... 1
1 .2 Counterbalance valve................................. 1
1 .3 Hydraulic valve ........................................... 1
1 .4 Hose reel .................................................... 1
2. Description of telescoping system
(Refer to the circuit diagram in
Chapter Z.) .................................... 2
2. 1 Extension circuit ......................................... 2
2.2 Retraction circuit......................................... 3
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Boom (Five-Section Boom)
1 . Structure................................................... 4
2. Disassembly ............................................. 7
2. 1 Removing the 2nd boom section................ 7
2.2 Removing the 3rd boom section................. 8
2.3 Removing the 4th boom section................. 9
2.4 Removing the top boom section................. 9
3. Check ..................................................... 11
3. 1 Boom ......................................................... 11
3.2 Slide plate.................................................. 11
3.3 Sheave ...................................................... 11
3.4 Boom telescoping wire rope ...................... 11
4. Reassembly............................................. 11
4. 1 Greasing .................................................... 11
4.2 Install anti-buckling bolts for
telescoping cylinder............................. 11
4.3 Installing lower slide plates ....................... 1 2
4.4 Installing slide plates onto sides
of rear end........................................... 1 2
5. Adjustment .............................................. 1 2
5. 1 Adjusting clearance for the boom ................ 1 2
5.2 Adjusting boom telescoping wire rope ......... 1 2
6. Test .................................................... 1 3
6. 1 Operation test ........................................... 1 3
6.2 Boom lateral warp test .............................. 1 3
6.3 Other functional test.................................. 1 3
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Jib
1 . Structure ................................................. 1 4
1 . 1 Location of Jib........................................... 1 4
1 .2 Jib main body............................................ 1 6
2. Adjustment .............................................. 1 8
2. 1 Adjusting jib 1 -2 connecting spring pin ..... 1 8
2.2 Adjusting jib inclination.............................. 1 8
2.3 Adjusting inclination of jib 2....................... 1 9
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Telescoping Cylinder
1 . Structure ................................................. 20
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Counterbalance Valve (Telescoping)
1 . Structure ................................................. 22
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