Milton CAT AP1055D - Manual (Page 13)

13
Engine
The Caterpillar ® C7 engine with
ACERT ® Technology is a six cylinder,
turbocharged, diesel engine. The
engine meets U.S. EPA Tier 3 and EU
Stage IIIa engine emission regulations.
Engine Cat ® C7
Gross Power kW hp
SAE J1995 167 224
Net Power kW hp
ISO 9249 166 223
EEC 80/1269 166 223
SAE J1349 165 221
Specifications
Bore 110 mm 4.33"
Stroke 127 mm 5.0"
Displacement 7.24 L 441.7 in 3
• The power ratings apply at a rated
speed of 2200 RPM when tested
under the reference conditions for the
specific standard.
• The net power advertised is the
power available at the flywheel when
the engine is equipped with
alternator, air cleaner, muffler and fan
at minimum speed.
• The net power at the flywheel when
the fan is at maximum speed is
151 kW (202 hp) per the SAE J1349
reference conditions.
• Derating is not required up to an
altitude of 2134 m (7,000 ft).
Suspension
The high-speed Mobil-trac™
undercarriage consists of a durable,
high-strength rubber belt with a thick
outer cover that includes five internal
layers of flexible steel cable. The track
is 3023 mm (119") long and 457 mm
(18") wide. Drive traction is provided
by a hydraulic tensioning cylinder with
accumulator that maintains friction
between the belt and the drive wheels.
Rubber-coated steel mid-wheels
provide smooth ride and high traction
efficiency by distributing weight over
the entire length of the belt.
The steel track undercarriage consists
of four 241 mm (9.5") diameter track
rollers, a special rear, four roller
152 mm (6") diameter bogey, and two
152 mm (6") diameter single roller
return idlers per side. Rollers are
bogied in pairs and each pair is
articulated for optimum leveling
capability. Rollers ride on Caterpillar
®
D3 track rails. Track rails are sealed,
lubricated and include a split master
link for quick track removal and
installation. The 3048 mm (120")
tracks are fitted with 127 mm (5") by
356 mm (14") rubber bonded track
pads. Track tensioning is provided by a
parallel link swing arm design that
provides constant hydraulic pressure.
Track tension is maintained without
manual adjustment. Recoil forces are
controlled by check and relief valves.
Electrical System
The 24-volt electrical system utilizes
two 12-volt batteries and a 24-volt,
100-amp alternator. The wiring is
color-coded and number impregnated
for easy servicing. Electrical wiring is
protected by vinyl-coated nylon
braiding for greater durability. Circuit
breakers located on the front side of
the center console include manual
resets.
Drive System
The Mobil-trac™ drive system utilizes
two dual path hydrostatic pumps and
two fixed displacement motors. The
pumps are infinitely variable with
electronic displacement controls (EDC)
for steering and speed. Single speed
motors drive two speed planetary gear
boxes to provide two propel ranges.
The drive system is equipped with two
switches located at the operator
stations. The two switches are used as
manual overrides and are directly
linked to EDC’s.
The steel track drive system utilizes
two dual path hydrostatic pumps and
two variable displacement motors. The
pumps are infinitely variable with
electronic displacement controls (EDC)
for steering and speed. The two speed
motors drive single speed planetary
gear boxes to provide two propel
ranges. The drive system is equipped
with two switches located at the
operator stations. The two switches are
used as manual overrides and are
directly linked to EDC’s.
Forward Speed Ranges
Paving
Mobil-trac 0-67 mpm 0-220 fpm
Steel Track 0-78 mpm 0-255 fpm
Travel
Mobil-trac 0-15 km/hr 0-9 mph
Steel Track 0-8 km/hr 0-5 mph