CAT 627G Manual do Utilizador descarregar pdf (Página 5)

Diagnostic Capability. Electronic

Technician (Cat ET) is used to display

real-time pressures, temperatures, fuel

settings and diagnostic messages as well

as a historical information such as engine

over-speeds, overheating, low oil

pressure and air filter restriction events.

Fuel Economy. Electronic controls yield

a fuel savings by optimizing the timing

setting for varying conditions. The ECM

matches timing to the load on the engine,

engine speed and temperature.

Air Filter Restriction. The ECM monitors

air filter restriction and sends a warning

message to the Electronic Monitoring

System III to alert the operator if the

restriction exceeds the allowable limit.

Reduced Exhaust Smoke. The ECM

reads electronic sensors to determine

the optimum fuel/air ratio, then precisely

controls fuel during cranking, starting

and acceleration to reduce smoke.

The ECM system is faster and more

efficient than mechanically controlling

the governor rack position.

Low Battery Elevated Idle. ECM

automatically compensates for low

alternator output at low idle by raising

the rpm for brief intervals to keep the

batteries fully charged.

Electronic Unit Injection (EUI).

Electronic injection provides complete

control over injection timing, duration,

rate and pressure under changing

conditions over the entire engine

operating range. The EUI controlled

engine delivers:

• improved fuel efficiency

• more power

• decreased smoke and emissions

• faster hot and cold starts

• better high altitude performance

• less noise than mechanical

injector engines

Engine Speed Lock. Allows the operator

to maintain a given engine speed

without using the accelerator pedal.

This eliminates operator fatigue

associated with holding the pedal down

for extended periods of time. An on/off

rocker switch enables the Speed Lock

feature, and a lamp indicates the feature

is active. Moving the rocker switch to

the off position, or activating the service

brakes or the retarder, disables the feature.

NGMR Engine Cooling System.

The standard radiator for the tractor is

the Next Generation Modular Radiator

(NGMR) that features 9 fins per inch,

whereas the previous model had a

standard radiator of 33 fins per inch.

The increased radiator fin spacing

reduces clogging in severe applications.

Scraper Radiator. The scraper has a

standard unit core radiator, a one-piece

unit design with 9 fins per inch. The larger

fin spacing reduces clogging and

eliminates the need for an attachment

radiator.

Automatic Belt Tensioning. Both the

tractor and scraper engines now have

automatic belt tensioning rather than

manual tensioning. Other improvements

for both the tractor and scraper engines

include:

• reducing the number of belts

(from five to two on the tractor,

from four to two on the scraper)

• eliminating the servicing for fan

drive bearings

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