DEHACO DSG, Operation And Maintenance Manual

Page: 14 / 19

27 26 © 2022 Dehaco B.V. • Operation and maintenance manual DSG Demolition and Sorting grabs • No. DSG.2165.0001 • 31-01-2022 Dehaco B.V. • Kruisbaak 25 • 2165 AJ Lisserbroek (NL) •
✆
+31 (0)252 - 41 79 50 •

info@dehaco.nl • www.dehaco.nl
1
6. Maintenance 6. Maintenance
6.1 Daily maintenance
1) For maintenance work, always place the grab in open
position on a flat and stable surface and ensure the
excavator cannot move.
2) When servicing the hydraulic system, the hydraulic hoses
should be disconnected. Prior to disconnecting the hoses,
ensure no pressure remains on the hoses. See the operating
instructions of the excavator for more information.
3) The grab must be lubricated once per every 8 operating
hours using the same type of grease specified for the
excavator.
4) When the interchangeable wear blades on the grab
shells have worn away to that extent that the grab can
no longer fully close, work must be discontinued and the
interchangeable wear blades must be changed or replaced.
(NOTE The interchangeable wear blades also serve as the
end stop for the cylinders.)
6.1.1 Lubrication schedule
6.1.2 Changing/replacing wear blades
1) Ensure the nut is installed with the conical side on the inside
of the shell.
2) Bolts must be tightened to the torque indicated on the table
on page 27.
1) Lubricating pivot points
1 = 1 x per 8 operating hours
2) Lubricating pivot points
1 = 1 x per 8 operating hours
3) Lubricating slewing ring
1 = 1 x per 8 operating hours
To ensure the wear blades remain securely fastened to the
shell during shock and tearing loads, it is recommended to
tack weld the interchangeable wear blade to the fixed blade.
6.1.3 Torque
The table on this page provides a summary of the torque required for the nuts and bolts on the slewing ring, blades and other components
of the DSG demolition and sorting grab.
Bolt size Torque (Nm) Torque (kg•m) Torque (ft•lb) Comments
Bout 10,9 Bout 10,9
M8 40 Nm 4 kg•m 29 ft•lb
M10 80 Nm 8 kg•m 60 ft•lb
M12 130 Nm 13 kg•m 94 ft•lb
M12 x 1,25 110 Nm 11 kg•m 80 ft•lb Caution! Fine thread!
M14 200 Nm 20 kg•m 145 ft•lb
M16 300 Nm 30 kg•m 217 ft•lb
M20 600 Nm 60 kg•m 434 ft•lb
M24 1000 Nm 100 kg•m 723 ft•lb
M27 1500 Nm 150 kg•m
1106 ft•lb
M30 2000 Nm 200 kg•m
1475 ft•lb
M36 3600 Nm 360 kg•m
2655 ft•lb
M39 4600 Nm 460 kg•m
3393 ft•lb