Milton CAT 990H - Manual (Page 4)

Cat C27 ACERT Engine. The C27 is a 27 L
(1,648 in
3 ) displacement, 12 cylinder,
“V” configured engine with Mechanical
Electronic Unit Injector (MEUI) fuel
system and Electronic Control Module
(ECM) that delivers power and efficiency
in the most demanding applications.
Benefits of the C27 include:
• ADEM™ IV
• Automatic altitude deration
• Elevated low idle
• Cold weather starting mode
• Acceleration delay on start-up to
reduce engine wear
• Advanced diagnostic capabilities
• Automatic control of ether aid
• 500 hour oil change interval with
CH-4 oil and new larger oil pan
• Dry-type air cleaner with primary
and secondary elements
• Engine/torque divider module isolation
mounted to the main frame to reduce
machine vibration and structure noise
• Monotherm pistons
Aftercooler. Lowers inlet charge
temperature and reduces thermal stresses
that can cause premature wear of pistons,
rings and liners.
High Injection Pressures. Independent
of engine speed, decreases smoke and
emissions while improving response.
Variable Injection Timing and Duration.
Improves fuel efficiency, cold starting
and decreases smoke and emissions.
Injection Rate Shaping. Reduces
emissions and reduces engine noise.
Fewer Mechanical Parts.
Improve reliability.
C27 Electronic Control. Provides many
benefits:
• Automatic altitude derate
• Elevated low idle
• Cold mode start for improved cold
weather starting
• Acceleration delay on startup to
reduce engine wear
• Advanced diagnostic capabilities
• ADEM IV
• Automatic control of ether aid
Oil-Cooled Pistons and Full-Length,
Water-Cooled Cylinder Liners.
Provide maximum heat transfer
for longer component life.
Engine Oil Cooler. Maintains optimum
oil temperature for proper cooling and
lubrication. Engine cooling is provided
by the Next Generation Modular Radiator.
Hydrostatic fan drive gives the standard
cooling package 110° F ambient capability.
Impeller Clutch Torque Converter (ICTC).
The converter allows the operator
maximum flexibility in modulating
rimpull. The first inch of travel of the
left brake pedal is used to modulate
rimpull from 100 percent (pedal at rest
position) to 20 percent of maximum
(pedal depressed about 25 mm [1 in]).
Once 20 percent of maximum rimpull is
achieved, the brake is applied. This gives
smooth transitions from brake-on to
brake-off, yielding fast, fluid loading
cycles. The torque converter also has
a standard lock-up clutch for fast, fuel
efficient load and carry cycles.
• The Rimpull Control System has
four factory preset reduced rimpull
settings. Each setting corresponds
to a maximum allowable impeller
clutch pressure.
• Rimpull Control System allows the
operator to vary rimpull based on
operating conditions for maximum
productivity while reducing tire
slippage and resulting costs.
• Converter de-clutches during
directional shifts. This allows
full throttle directional shifts
maintaining hydraulic speeds.
• Smooth approach to trucks and
hoppers builds operator confidence,
producing faster cycle times.
• Lock-up feature provides “direct
drive” for load and carry applications.
No converter slip means higher
efficiency and lower fuel costs.
• Improved calibration procedure.
• Left pedal modulation.
• Compensates for wear.
• Provides the ability to recalibrate
for optimum left pedal modulation
regardless of torque converter wear.
B
ra
k
e
s
(2
0%
R
im
p u ll
)
100% Rimpull
Selected
Left Pedal
20% Rimpull
Selected
4
The 990H power train components give you the dependable performance expected from
Cat Wheel Loaders.
Power Train