MDG Operating & Maintenance Manual
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TECHNICAL SPECIFICATIONS
Model
Min. Excavator Weight
MDG Weight
Jaw Width
Jaw Opening
Jaw Capacity
MDG 70
11,000 Lbs
5 mTons
900 Lbs
400 Kg
28 in
710 mm
59 in
1,500 mm
0.3 yds³
0.2 m³
MDG 140
22,000 Lbs
10 mTons
1,900 Lbs
900 Kg
31 in
790 mm
71 in
1,800 mm
0.5 yds³
0.4 m³
MDG 160
29,000 Lbs
13 mTons
2,400 Lbs
1,100 Kg
35 in
890 mm
77 in
1,960 mm
0.8 yds³
0.6 m³
MDG 250
37,000 Lbs
17 mTons
3,300 Lbs
1,500 Kg
39 in
990 mm
83 in
2,110 mm
1.0 yd³
0.8 m³
MDG 310
55,000 Lbs
25 mTons
4,200 Lbs
1,900 Kg
47 in
1,190 mm
87 in
2,210 mm
1.2 yds³
0.9 m³
MDG 400
66,000 Lbs
30 mTons
6,000 Lbs
2,700 Kg
54 in
1,370 mm
87 in
2,210 mm
1.4 yds³
1.1 m³
CONTROLS
Excavator Control
MDG Action
Auxiliary Control
Opens/Closes Jaws
MDG uses two auxiliary hydraulic circuits. Consult your
distributor for excavator specific installation information.
BLEED THE HYDRAULIC CIRCUIT
Air must be bled out of the hydraulic circuit prior to
operation. Air in the system leads to cavitation, oxidation
of the oil and excessive heat. These conditions promote
hydraulic oil break-down, contamination, noise, sluggish
operation, reduced component life and potential cylinder
damage.
1.
Start with MDG in the vertical position.
2.
Set the excavator at idle speed.
3.
Slowly open the jaws until a noticeable change in tone
of the excavator is heard, indicating a full cylinder.
Release the controls and do not continue to apply full
operating pressure to the cylinder.
4.
Slowly close the jaws until the cylinder rod is extended
approximately 1/4 stroke.
5.
Open the jaws to retract the cylinder all the way.
6. Repeat steps 3 and 4. Extend the cylinder a quarter
stroke more each time, until you reach full stroke.
7.
Slowly cycle back and forth, at least five times, to full
stroke. Be careful not to apply full operating pressure
to the cylinder at this time.
8.
Check the base machine hydraulic fluid level and fill if
necessary.
9.
Slowly extend and retract the excavator cylinder to it’s
limits. Check for interference between the attachment
and the excavator boom or stick. Check the hydraulic
lines that connect to the attachment. Ensure they
are not rubbing or becoming damaged in any way.
Contact your dealer immediately if interference
occurs.
OPERATING TIPS
•
When handling materials, keep the load as close to the
base machine as safely possible. This will provide the
greatest machine stability.
•
Avoid handling long, heavy materials off center.
•
Keep the attachment properly maintained. Lack
of maintenance can lead to greater problems and
potential downtime.
