8 | MDG Operating & Maintenance Manual
INSTALLATION
Each MDG is shipped with a custom mounting bracket. Refer to the Parts Manual shipped with the attachment for
specific installation information.
1.
Locate flat, hard ground (e.g., concrete floor) for installation. Lift and place the attachment on the ground. Use
blocking if necessary.
2.
Remove the excavator bucket. Follow the manufacturer’s recommended procedure.
Note: Plug hydraulic hoses to prevent contamination.
3.
Install MDG, using the custom mounting bracket, to the excavator arm.
HYDRAULIC INSTALLATION
DO NOT connect hydraulic lines while they are pressurized.
Escaping fluid under pressure can penetrate the skin, causing
serious injury.
HYDRAULIC CIRCUIT REQUIREMENTS
Model
Jaw Cycle Circuit (Max)
Rotation Circuit (Max)
MDG 70
13 GPM (50 LPM)
4,350 PSI (300 Bar)
3 GPM (12 LPM)
2,755-3,045 PSI (190-210 Bar)
MDG 140
26 GPM (99 LPM)
5,075 PSI (350 Bar)
7 GPM (27 LPM)
2,755-3,045 PSI (190-210 Bar)
MDG 160
32 GPM (122 LPM)
5,070 PSI (350 Bar)
7 GPM (27 LPM)
2,755-3,045 PSI (190-210 Bar)
MDG 250
42 GPM (159 LPM)
5,070 PSI (350 Bar)
9 GPM (35 LPM)
2,755-3,045 PSI (190-210 Bar)
MDG 310
48 GPM (182 LPM)
5,070 PSI (350 Bar)
9 GPM (35 LPM)
2,755-3,045 PSI (190-210 Bar)
MDG 400
53 GPM (201 LPM)
5,070 PSI (350 Bar)
9 GPM (35 LPM)
2,755-3,045 PSI (190-210 Bar)
1.
Connect the hydraulic hoses to the connections located on the rotating head.
2.
Torque all hydraulic fittings using the table below.
ORFS Size
Hex Nut Size
Torque
-8
(0.5 in / 12.7 mm)
15/16 in
(28.8 mm)
52 Ft-Lbs
(95 Nm)
-16
(1 in / 25.4 mm)
1-5/8 in
(41.3 mm)
200 Ft-Lbs
(271 Nm)
