Komatsu PC58UU-3, Руководство по ремонту

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DISASSEMBLY AND ASSEMBLY ASSEMBLY OF WORK EQUIPMENT VALVE (NOTES)
30-60
PC58UU-3
2
12
7. Tighten the mounting bolt of spring case (23)
and plate (24) to the specified torque.
8. Tighten plugs (25) and (26) of each valve to
the specified torque.
9. Tighten the mounting bolt of valve cover (27)
and stud bolt (29) and the nut to valve block
(28) to the specified torque.
10. Always tighten or loosen the 9 mounting
bolts (87) on each spool of the retainer of the
spool return spring with spool (88) in the
valve chest (89)(to avoid deformation).
11. Apply one drop (0.02 g) of Loctite before
installing plug (91) on the lower surface of
swing valve (90).
★
Degrease and dry the plugs and screws of
the valve chest thoroughly using Drysol
or similar products.
★
Do not apply pressure for at least two
hours after tightening the plugs.
Mounting bolt:
9.8 - 12.7 Nm {1 - 1.3 kgm}
Plug: 47 - 58.8 Nm {4.8 - 6 kgm}
Bolt and nut:
29.4 - 34.3 Nm {3 - 3.5 kgm}
6.9 - 9.8 Nm {0.7 - 1.0 kgm}
Plug screw: Loctite No. 638
Nut:
1.3 - 1.7 Nm {0.13 - 0.17 kgm}