Trucking Magazine – July 2019

CLASSIC TRUCK CANADIAN SUPER-HEAVIES

82 TRUCKING Summer 2019 http://www.truckingmag.co.uk

was the P-16, the model designation
reflecting the 16-inch deep frame rails
of the 40-inch wide chassis. Introduced
in 1965, P-16s are readily identifiable
by the all-welded chassis with I-beam
rails angled upwards towards the rear.
The configuration has the advantage
of accommodating high capacity rear
suspension packs without having to
raise the height of the engine, cab and
front suspension, which would have
been necessary with conventional
straight chassis rails.
New-build P-16s were available with
Allison automatics, Clark Powershift
or Spicer five-speed plus four-speed

auxiliary transmissions. The 14-ton

capacity front axle was suspended on a

slipper spring and torque rod system.

The standard 50-ton capacity bogie was

suspended on 5-inch wide, 1-inch thick

leaves, with 11 leaves per pack.

Prime movers

Between 1972 and 1977, Pacific built

a fleet of 23 12-inch frame depth

P-12 prime movers for South African

Railways & Harbours (SAR&H). Most

had a 650 bhp Cummins K19, some

de-rated to 500 bhp. Five, weighing in

at around 45 tonnes and dubbed ‘Ultra

Pacifics’, were powered by 800 bhp

Cummins 1710C V12s, driving through

a Clark eight-speed transmission and

torque converter system. Fuel tank

capacity was 2000 litres to feed a 2.2

litres per mile thirst. Powershift/torque

converter transmission systems were

One of four 700 bhp Cummins

engined Hayes WHDX 6x6 prime

movers built for Spanish heavylift

specialist Arbegui

The size of these gargantuan muscle

trucks is conveyed by the Peterbilt

parked next to the last new-build Pacific

ABOVE Photographed some years back, this heavy-

haul Hayes found its way to Iran. Its 800 bhp Cummins

V12 might be a retrofit