Wednesday, 07 August 2019 15:53

ROPS: still a viable option

Written by  Mark Daniel

Many dairy farmers may once have favoured a ROPS tractor for its easy access and dismounting to open gates or take down hot wires.

But demand for ROPS machines has recently waned, probably because the customary 75-85hp ROPS tractor may no longer be up to handling the larger feeder wagons now commonly used.

Massey Ferguson’s 5700ES and 6700ES Global series tractors can deal with that problem. They come in a range 92-132hp in a straightforward, heavy-duty package with five models. 

The MF 5700 series tractors have a 2430mm wheelbase, 3700kg tare weight and 4.3 tonne linkage capacity. The 5709 and 5710 deliver 92 and 102hp, respectively. 

The slightly larger MF 6700 series has three models -- the 6711, 6712 and 6713 delivering 112, 122 and 132hp, respectively. The wheelbase is longer at 2500mm, the tare weight 3900kg and lift capacity 5200kg. 

These specs make them ideal loader tractors, capable of handling heavy loads in livestock and mixed farming enterprises, or as second or third main tractors on arable farms.

Power comes from AGCO Power 4.4L, 4-cylinder mechanical injection engines said to have excellent power and torque ratings of up to 540Nm at 1500rpm (MF 6713), with low maintenance and running costs. 

All models are equipped with a 12 x 12 synchro mechanical transmission with six synchronised speeds in two synchronised ranges. Top speed is 40km/h. Forward/reverse changes are by a standard power shuttle which allows fingertip shifts without using the clutch, or with the de-clutch button on the gear lever. 

A high pressure gear pump supplies 57L/min hydraulic flow for the rear linkage. A second 41L/min pump is dedicated to the auxiliary spool valves. A separate pump delivers 27L/min for auxiliary circuits including the steering, 4WD, diff-lock engagement and PTO control.

When extra flow is required, perhaps when using a frontloader, the primary and secondary pumps can combine their outputs to provide 98L/min to the auxiliary system. Two double acting spool valves with float are fitted as standard and a third spool valve with flow divider is optional. 

Massey Ferguson’s electronic hitch control (ELC) system provides accurate position and draft control.  PTO choice on the 5700 series is 540 or 540E, and 540/540E at 1000 rpm on the 6700 units.

Both tractor series, dubbed the Essential Variant, have a semi-platform with side mounted gearshift levers, and pendant pedals controlling the oil-immersed disc brakes. 

A tilt steering column offers good operator ergonomics, and ease of use is helped with external linkage controls on the rear nearside fender. 

All models have 4WD, with a semi-automatic, electro-hydraulic diff lock on the front and rear axles helping to tackle difficult conditions.

A 55-degree steering angle helps with tight turns or yard duties, reinforcing the models’ suitability for frontloader work. 

 

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