Messersi Excavators M-28K

• Machine with hydrostatic transmission with two displacement axial piston motors and planetary drives with negative control brakes. Travel counter – balance valves.
• Engine complies to the norm 97/68/EC, Stage 2, relevant to the polluting emissions.
• Original design with reduced overall dimensions with a total bonnet engine protection.
• The sprung and adjustable seat ensures the control of the machine in full security and comfort.
• The machine can be equipped with a spacious and comfortable cab (optional) with heating system. The cab is in accordance with TOPS antirolling and FOPS antifalling objects Norms.
• Lock of all the pilot assisted controls and of the levers when the armrest is lifted, thus excluding the danger of any undesired and uncontrolled mouvement caused by the accidental push of the control levers and pedals, when getting on and off the machine.
• Second travel speed to be electrically selected to increase travelling speed.
• Straight travel circuit, electrically engaged, for simultaneous operation of travel and front digging attachment in case of use of the grass-bush cutter or to avoid to get stuck in the mud when the machine does not work in a solid lands.
• Extraordinary manoeuvrability due to the employment, on all functions, of pilot assisted controls (lifting, excavation, bucket and turret rotation).
• Rubber gasket on the bucket articulations, working as dust and noise preventers.
• Interchangeability between short pitch rubber trucks and steel trucks.

Standard equipment

• Bucket of 450 mm (SAE capacity lt. 36)
• Canopy (FOPS, TOPS Norms)
• Second travelling speed to be electrically selected
• Straight travel to be electrically selected
• Digging arm of mm 1.200
• USE & MAINTENANCE and SPARE PARTS MANUALS

Optional equipment

• Bucket of mm 250, 300, 350, 450, 500, 600, 800, standard, for rocks and for Quick Hitches; bucket for slopes fixed or orientable; slopes cleaning buckets; mechanical or hydraulic bucket quick hitches
• Hydraulic breaker
• Hydraulic manual breaker
• Grass-bush cutter
• Hydraulic drill
• Closed cab with heating system (FOPS, TOPS Norms)
• Steel tracks
• Longer digging arm of 1500 mm
Data, features and illustration are not binding and may be altered without any notice.

Engine

Make and model		Kubota D1703
Max. power at 2800 rpm (DIN 6271)	HP/Kw	34.5 / 25.4
Installed power per N° 2400 rpm of revolutions	N° giri	32 / 23.6
Cylinders	N°	3
Displacement	cm³	1647
Cooling (with hydraulic drive gauge)		water

Hydraulic system

Hydrostatic transmission with axial piston motors and planetary drives with negative control brakes. Travel counter – balance valves
Main axial pistons pump with variable displacement	lt/min.	34 x 2
Secondary gear pump	lt/min.	29 x 1
Total delivery	lt/min.	97
Auxiliary hydraulic flow for P.T.O.	lt/min.	63
Max. working pressure	bar	210 / 200
Turret rotation speed (with hydraulic motor and negative control brake)	g/min	10
Hydraulic joy-stick servo-controls to move bucket and arms, and to rotate the turret
Levers to control travelling and refilling blade; pedals to control arm swing and single and double effect P.T.O.
Heat exchanger for oil cooling

Undertrack

Steel frame of box section type
Truck’s type		rubber
Truck’s width	mm	300
Truck’s bearing rolls	N°	4+4 low 1+1 up
Truck tensioning		with grease
Refilling blade	mm	300 x 1470
Operational weight (with canopy)	Kg	2650
Operational weight (with cab)	Kg	2780
Tearing force at teeth	daN	2200
Digging force	daN	1450
Travel speed I/II	Km/h	2.3 / 4.2
Max. gradient capacity	more than %	100
Specific ground pressure (with canopy)	Kg/cm²	0.28
Specific ground pressure (with cab)	Kg/cm²	0.30

Refuelling

Fuel tank capacity	lt	40
Hydraulic oil tank capacity	lt	65

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