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Engine, Transmission, Brakes – Milton CAT PS150C User Manual

Page 7: Wheels and tires, Axles, Electrical system

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7

Engine

Four-stroke, four cylinder 3054C
turbocharged diesel engine. The engine
meets U.S. EPA Tier 2 emissions
regulations.

Ratings at

RPM

kW

hp

Gross power

2200

75

100

Ratings of Caterpillar machine engines
are based on standard air conditions of
25°C (77°F) and 100 kPa (29.61" Hg)
dry barometer. Power is based on using
API gravity of 35 at 15°C (60°F), fuel
having a LHV of 42 780 kJ/kg (18,390
Btu/lb) used at 30°C (86°F) [ref. a fuel
density of 838.9 g/L (7.001 lb/U.S.
gal)]. Net power advertised is the power
available at the flywheel when the
engine is equipped with fan, air cleaner,
muffler and alternator.

The following ratings apply at 2200
RPM when tested under the specified
standard conditions:
Net Power

kW

hp

ISO 9249

72

96

SAE J1349

72

96

EEC 80/1269

72

96

Dimensions
Bore

105 mm

4.13"

Stroke

127 mm

5"

Displacement

4.4 liters

269 cu. in.

Dual-element, dry-type air cleaner with
visual restriction indicator, glow plug
starting aid and fuel/water separator are
standard.

Electrical System

24-volt electrical system includes two
maintenance-free Cat batteries, color-
coded and numbered wiring wrapped in
nylon braid. A 55-amp alternator
powers the electrical system.

PS-150C specifications

Axles

Tractive effort is delivered to the four
rear drive wheels by standard, heavy-
duty axles.

Transmission

Two-speed hydrostatic propel system.
Hydrostatic pump provides oil to two
hydrostatic motors mounted above the
drive axles. Drive shafts connect the
motors to the rear axles.

A single propel lever located on the
control console provides smooth
hydrostatic control of the infinitely
variable speeds in both forward and
reverse.

Max. speeds (forward and reverse):

Low

0 - 11 km/h (6.8 mph)

High

0 - 25.6 km/h (15.9 mph)

Brakes

Service brake features

Closed-loop hydrostatic drive system
provides dynamic braking during
machine operation.

Secondary brake features*

Spring-applied/hydraulically released
disc brakes are actuated by a switch on
the control console. They are also
activated automatically if pressure is
lost in the brake circuit or when the
engine is shut off.

*Brake systems meet SAE standard J1472 and EN500-4.

Wheels and Tires

6-Ply: 8.50/90 x 15

5 wheels front, 4 wheels rear

11-wheel option

6-Ply: 8.50/90 x 15

Heavy weight option

12-Ply: 7.50 x 15