Cat PM620 & PM622 pro­fil­ers

Cater­pil­lar has brought the PM620 and PM622 pro­fil­ers to Aus­tralia

Earthmovers & Excavators - - Con­tents - – Brad Lock­yer

Cater­pil­lar launched its PM620 and PM622 pro­fil­ers in Mel­bourne re­cently, so we headed to the com­pany’s Tul­la­ma­rine head­quar­ters to get a close-up look at the ma­chines whose every sys­tem and com­po­nent have been re­fined.

The launch comes ahead of a broader plan to bring the F se­ries of pro­fil­ers and pavers to Aus­tralia next year — a move which Cater­pil­lar says shows the com­pany’s com­mit­ment to the lo­cal paving mar­ket.

The PM620 and PM622 are 33-tonne as­phalt pro­fil­ers (also known as cold plan­ers in the US) driven by a 470kW Cat C18 AC­ERT En­gine. The Aus­tralian ver­sion will be con­fig­ured to US Tier 3 emis­sions stan­dards.

The dif­fer­ence be­tween the two mod­els is in the width of the cut­ting drum: the PM620 has a cut­ting width of 2m and the PM622 has one of 2.2m. The PM620 is nar­row enough to fit the Aus­tralian stan­dard heavy ve­hi­cle width of 2.5m (once clear­ance is taken into ac­count), mak­ing trans­port much eas­ier.

At the launch Earth­movers & Ex­ca­va­tors mag­a­zine got to in­spect the PM620, which sits on four leg posts with po­si­tion sen­sors that au­to­mat­i­cally ad­just their length to keep the ma­chine level at the de­sired height.

The posts sit on four crawler tracks that can op­er­ate in­de­pen­dently of one an­other to avoid slip­page, and can also au­to­mat­i­cally ad­just track ten­sion based on the work­ing sur­face.

In the belly of the beast is the 2.0/2.2m cut­ting drum. Housed within a wider cham­ber that Cat says is op­ti­mised for high ma­te­rial flow and min­i­mal block­ages, its 178 car­bide-tipped cut­ting bits can reach a cut­ting depth of 330mm.

The PM620 has a flush side with an ad­justable pro­tec­tive plate to al­low op­er­a­tors to cut close to build­ings and other ob­sta­cles.

But a pro­filer is only a good as its con­veyor, says Cat Asia-Pa­cific sales man­ager Greg Mum­ford.

“Re­ally the choke point on any cold planer is the con­veyor; the mill can pump out more than the con­veyor can,” Mum­ford says. “So what we’ve done is widened the width of the con­veyor, so that we can in­crease our pro­duc­tion.”

The 855mm-wide con­veyor can be raised to a height of 5.37m and can swing 60 de­grees from cen­tre in ei­ther di­rec­tion. The con­veyor folds up to re­duce to­tal ma­chine length for trans­port.

An op­tional dust abate­ment sys­tem vents dust away from the work­ing area through hoses to keep the con­veyor clear.

The op­er­a­tor’s en­vi­ron­ment fea­tures a stan­dard Cat LCD touch­screen that dis­plays ma­chine in­for­ma­tion and gauges, as well as the rear cam­era feed. The PM620 can also link to Cat’s Grade Con­trol sys­tem [link] with this in­for­ma­tion dis­play­ing here too.

The en­gine bay is eas­ily ac­ces­si­ble via a large, pow­ered en­gine hood which al­lows op­er­a­tors to get right in to the en­gine, sim­pli­fy­ing and speed­ing up the main­te­nance process.

The Cat PM620 pro­filer has a widened con­veyor for a higher pro­duc­tion rate

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