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Messersi Excavators M-28U

• Innovative design with the tail always remaining within the width of the tracks (Zero Tail Swing).
• Suspension and adjustable operator’s seat increases productivity by providing optimum comfort.
• Travel levers and servo-controls disabling system by armrest lifting prevents accidents due to unexpected machine movement during entry or exit from the driving place.
• Extraordinary manoeuvrability due to the use of pilot assisted controls (joy-sticks) to operate arms and buckets.
• Straight travel contemporary with all arms/bucket manoeuvring.
• Rollers and idler wheels with rolling bushing replacing the slithering bushes for a remarkable increasing in the traction and life time performances.
• The round shape design recalls the other models of the range, thus creating a continuity of style and image.

Standard Equipment

• Canopy according to TOPS-FOPS norms
• Standard bucket of mm 450 (SAE capacity lt. 64)
• 2-speeds travel electric switch
• Oil recovering system on dipstick ram
• mm 1200 long dipstick
• Hydraulic Power Take-Off (P.T.O.)
• USE & MAINTENANCE and SPARE PARTS MANUAL

Optional Equipment

• Buckets of mm 250, 350, 450, 500 standard, for rocks and for Quick Hitches
• Buckets for slopes standard or swivelling
• Buckets for cleaning
• Mechanical or hydraulic Quick Hitches
• Hydraulic breaker
• Hand breaker
• Hydraulic drill
• Grass-bush cutter
• Steel tracks
• Additional ballast (202 Kg)
• mm 1500 longer arm
• Cab with heating system according to TOPS norms
• Air conditioning
Data, features and illustrations are not binding and may be altered without any notice.

Engine

Make and modelKubota D1703M
Max power at 2800 rpm (DIN 6271)HP/Kw35 / 25.7
Rated horse power at 2200 rpmHP/Kw30 / 21.8
Cylinders3
Displacementcm³1647
Coolingwater
Battery1 – 12V – 65 Ah

Hydraulic System

Hydrostatic transmission with orbital motors and planetary reduction gears with negative brakes
Travelling counter-balance valves
N.2 variable displacement piston pumps + gear pumplt/min33 x 2 + 26
Total deliverylt/min92
Auxiliary hydraulic flow for P.T.O.lt/min59
Max working pressurebar250 / 200
Slew speed (with piston motors and negative brake)g/min9.0
Boom, arm, bucket and slew actuated by servo-controlled joysticks
Levers to control track and dozer blade; pedals to control boom swing and single and double effect P.T.O.
Heat exchanger for oil cooling

Undercarriage

Box section steel frame
Track type and widthmmrubber 300
Track bearing rollers4+4 low/1+1 up
Track tensioninggrease
Refilling blademm300 x 1600

Performances

Shipping weightKg2680
Operating weightKg2750
Break out forcedaN2620
Digging forcedaN1725
Travel speedKm/h2.3 / 4.3
Max gradient capacitymore than %100
Specific ground pressureKg/cm²0.28

Refuelling

Fuel tank capacitylt35
Hydraulic oil tank capacitylt56

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