HD komatsu Trucks Controls & Operations

 thank you for your interest in komatsu

commodity products today we'll be

discussing the controls and operation of

Komatsu's HD 465 and HD 605 - 8 truck so

with that let's get started we've been

discussing the location of the truck

controls now we will learn how they

actually function some of these controls

and operations are directly affected by

adjustments that are completed during

the commissioning process ensuring

correct adjustments and understanding

each function will provide the operator

a safe and satisfying experience let's

get started let's first start by looking

at the three foot pedals to the far

right is the standard accelerator pedal

its movement should be free of any

obstructions immediately to the left is

the right brake pedal this is the

operators normal service brake pedal

when the pedal is depressed both the

front and rear brakes are applied

proportionally based on the amount that

the pedal is depressed remember the

front brake application is dependent on

the cutoff switch position to the far

left is a red brake pedal this pedal is

called the secondary brake pedal

depressing this pedal will apply both

the front and rear brakes regardless of

where the front cutoff selection switch

is set to this brake pedal is to be used

only in the case where there is a brake

system issue or failure and the truck

cannot be stopped by the normal service

brake system we have already discussed

the four positions of the hoist EPC or

electronic proportional control lever we

will now review how each of them operate

when the dump lever is pushed all the

way down

this applies hydraulic pressure for the

bed to be powered down when the dump

lever is released it returns to the

float position with the engine running

the normal spring-loaded operatic

position is the float position when the

lever is pulled all the way up from the

float position it will

asked by the hold position and go into

the raised position the handle will stay

in the raised position by the detent at

this time the bed will be going up as

the body raises the float icon on a dash

will illuminate if the bed sensors are

set correctly at a specific angle the

handle will release and return to the

hold position you have the ability to

further extend the cylinders but you

must do so by manually lifting the lever

make sure to install the body pins now

if needed to secure the bed beside the

handle the lock knob has a pin that

keeps the lever in the holes position it

must be turned a quarter of a turn for

the pin to engage the lever this is only

for locking the handle in the hold

position when the bed is to be lowered

push the handle down to the float

position with the correct settings the

body should lower to the frame smoothly

the float light should go off and the

truck will shift correctly there are

four more controls we need to discuss to

are located on the right side of the

steering column these are the manual

retarder and arsc or automatic retarder

speed control both control handles

operate the same system in the rear axle

but do so differently using the manual

retarder control lever the operator

physically pulls the handle down when

descending a hill to slow or stop the

truck the further the handle is pulled

down the more aggressive the retarder

application is applied anytime the

retarder lever is applied the retarder

pilot light illuminates you never want

to use the manual retarder lever as a

parking brake remember to always apply

the parking brake when exiting the truck

the small lever below the manual

retarder control lever is the arsc

control arsc stands for automatic

retarder speed control this is a feature

that when enabled and set will

automatically apply the retarder to keep

the truck at or below the set speed when

the system is enabled the travel speed

indicator will show two dashes when

driving the truck at the desired

downhill speed press the end of the

lever to populate the speed indicator

the system will memorize the setting if

the set speed on the indicator needs to

be adjusted raise the handle to increase

was pushed down to decrease to cancel

the speed altogether pull the lever to

you for at least two seconds when

descending the hills there are two

parameters that must be met for the

system to work correctly the operator

must be off the throttle and the truck

speed needs to be at or below the set

for tarter speed when this happens the

arsc ready light will illuminate if the

weight of the load increases the truck

speed over the set parameters the arsc

will proportionally apply the retarder

so the truck does not exceed the set of

feet the gearshift lever allows the

operator to select any speed range for

the transmission there are seven forward

one reverse and the neutral gear

selections select the gearshift range

with the gearshift lever according to

the travel conditions the D or drive

position is used for normal travel when

d is selected the transmission will

start off in second gear unless the

operator has selected to start in first

gear by way of the monitor panel the

transmission will shift up to seventh

gear automatically based on the travel

speed the transmission will be fixed in

first gear moving forward with no

reverse if the body is raised in any

forward position is selected other than

the decision the truck will start off in

first gear and shift automatically up to

the highest speed that is selected use

these positions when traveling on soft

ground when it is difficult to travel at

high speed when starting off on a slope

with the bed loaded or when traveling

downhill the reversed position only

operates in first speed the parking

brake switch is right beside the gear

shift lever it is used to apply and

release the parking brake by pushing the

top of the switch the parking brake is

applied when the parking brake switch is

set to the park position the parking

brake pilot lamp lights up on the

monitor panel if the gearshift lever is

put in to any position other than

neutral the centralized winning lamp

will light up and the alarm buzzer will

sound intermittently when the bottom of

the switch is pushed the parking brake

is released this is the normal travel

position for safety reasons remember

that if the engine stops running while

the parking brake switch is in the

normal

Travel position the parking brake will

be applied automatically when starting

the engine again set the parking brake

switch to the park position and then set

it back to the normal travel position to

release the parking brake this concludes

the controls and operation for Komatsu's

HT for 6 5 & 6 o 5-8 truck if you have

any questions or need any additional

information please refer to the

operation and maintenance manual located

behind the seat thank you for your

interest in commodity production bolog