Gradall 544D (9136-4003) Service Manual User Manual download pdf (Page 23)

Form No. 20220

544D-10 Owner/Operator Manual

Starting the Engine

1. Make sure all controls are in “Neutral” and all electrical

components (lights,

heater, defroster, etc.) are turned off. Set

parking brake.

2. Depress accelerator pedal approximately 1/4 to 1/3 of travel from top.

3. Turn ignition switch to “START” to engage starting motor. Release key

immediately when engine starts. If engine fails to start within 20 seconds,

release key and allow starting motor to cool for a few minutes before

trying again.

4. After engine starts, observe oil pressure gauge. If gauge remains on zero

for more than ten seconds, stop engine and determine cause. Correct

malfunction before restarting engine. Minimum pressure at operating

temperature:

Low idle: 10 PSI (69kPa)

5. Warm up engine at approximately 1/2 throttle until engine coolant

temperature reaches operating range.

Cold-Weather Starting Aids

In cold

weather situations, a supplemental starting aid may be required.

Gradall-

approved starting aids employ ether. If your handler is equipped with an ether

starting aid, the following applies:

Cummins Engine

• Hold switch on for 3 seconds to fill valve.

• Release switch to discharge ether while cranking engine.

• As engine starts, use additional ether as required to keep engine

running.

Deere Engine

• Ether application is triggered by temperature gauge located on engine.

• At start-up, temperature gauge on engine will detect if ether is needed.

Follow normal start-up procedure, shown above.

• Ether is employed and additional will be released if needed, to keep engine

running.

• A second battery is added for additional cold-cranking capacity.

Battery-Boosted Starting

If you ever have to battery-boost start (jump-start) your handler, proceed as

follows:

• Never allow vehicles to touch

• Connect the positive (+) jumper cable to positive (+) post of discharged

battery

• Connect opposite end of positive (+) jumper cable to positive (+) post of

booster battery

• Connect the negative (-) jumper cable to negative (-) post on booster battery

• Connect opposite end of negative (-) jumper cable to ground point on machine

away from discharged battery

• Follow standard starting procedures

• Remove cables in reverse order after machine has started

ENGINE OPERATION

6.0

NOTE!

Engine will not start unless forward/

reverse lever is in “Neutral” and

parking brake switch is applied.

WARNING

Operator must be seated with seat

belt fastened, forward/reverse

lever in “Neutral” position, parking

brake applied and all hydraulic

controls in “Neutral” before starting

engine.

Turning ignition switch to “START”

position while engine flywheel is

rotating may cause serious damage

to engine and/or starting motor.

CAUTION

If you use a starting aid employing

ether or a similar substance, pay

particular attention to

manufacturer’s warnings. Excessive

ether may cause severe engine

damage.

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Gradall 544D (9136-4003) Service Manual User Manual Page 23

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