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 model		Kubota D1703M
Max power at 2800 rpm (DIN 6271)	HP/Kw	35 / 25.7
Rated horse power at 2200 rpm	HP/Kw	30 / 21.8
Cylinders	N°	3
Displacement	cm³	1647
Cooling		water
Battery	N°	1 – 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 pump	lt/min	33 x 2 + 26
Total delivery	lt/min	92
Auxiliary hydraulic flow for P.T.O.	lt/min	59
Max working pressure	bar	250 / 200
Slew speed (with piston motors and negative brake)	g/min	9.0
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 width	mm	rubber 300
Track bearing rollers	N°	4+4 low/1+1 up
Track tensioning		grease
Refilling blade	mm	300 x 1600

Performances

Shipping weight	Kg	2680
Operating weight	Kg	2750
Break out force	daN	2620
Digging force	daN	1725
Travel speed	Km/h	2.3 / 4.3
Max gradient capacity	more than %	100
Specific ground pressure	Kg/cm²	0.28

Refuelling

Fuel tank capacity	lt	35
Hydraulic oil tank capacity	lt	56

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