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BASIC PRINCIPLES OF HYDRAULICSBASIC PRINCIPLES OF HYDRAULICS
The basic principles of hydraulics are few and simple:-
LIQUIDS HAVE NO SHAPE OF THEIR OWN.
LIQUIDS WILL NOT COMPRESS.
LIQUIDS TRANSMIT APPLIED PRESSURE IN ALL
DIRECTIONS.
LIQUIDS PROVIDE GREAT INCREASES IN WORK FORCE.
The basic principles of hydraulics are few and simple:-
LIQUIDS HAVE NO SHAPE OF THEIR OWN.
LIQUIDS WILL NOT COMPRESS.
LIQUIDS TRANSMIT APPLIED PRESSURE IN ALL
DIRECTIONS.
LIQUIDS PROVIDE GREAT INCREASES IN WORK FORCE.
ADVANTAGES OF HYDRAULIC SYSTEMSADVANTAGES OF HYDRAULIC SYSTEMS
~ FLEXIBILITY (HOSES CAN BE MOVED TO ANY LOCATION)
~ MULTIPLICATION OF FORCE (SMALL TO LARGE LOADS)
~ SIMPLICITY (FEWER MOVING PARTS)
~ COMPACTNESS (COMPONENT SIZE e.g. SMALL MOTORS)
~ ECONOMY (FROM SIMPLICITY TO COMPACTNESS)
~ SAFETY (OVERLOAD PROTECTION/FEWER MOVING PARTS
~ VARIABLE SPEED (MANUAL OR AUTOMATIC VARIATION)
~ FLEXIBILITY (HOSES CAN BE MOVED TO ANY LOCATION)
~ MULTIPLICATION OF FORCE (SMALL TO LARGE LOADS)
~ SIMPLICITY (FEWER MOVING PARTS)
~ COMPACTNESS (COMPONENT SIZE e.g. SMALL MOTORS)
~ ECONOMY (FROM SIMPLICITY TO COMPACTNESS)
~ SAFETY (OVERLOAD PROTECTION/FEWER MOVING PARTS
~ VARIABLE SPEED (MANUAL OR AUTOMATIC VARIATION)
~ REVERSIBLEB (DIRECTION CAN BE REVERSED)
~ CAN BE STALLED
~ REVERSIBLEB (DIRECTION CAN BE REVERSED)
~ CAN BE STALLED
DISADVANTAGES OF HYDRAULIC SYSTEMSDISADVANTAGES OF HYDRAULIC SYSTEMS
~ EFFICIENCY LOWER THAN MECHANICAL SYSTEM
~ NEED FOR CLEANLINESS
~ HIGH FLUID PRESSURE (CAN BE DANGEROUS)
~ CAN BE MESSY (LEAKS)
~ EFFICIENCY LOWER THAN MECHANICAL SYSTEM
~ NEED FOR CLEANLINESS
~ HIGH FLUID PRESSURE (CAN BE DANGEROUS)
~ CAN BE MESSY (LEAKS)
WORKING WITH HYDRAULIC
MACHINES AND EQUIPMENT
WORKING WITH HYDRAULIC
MACHINES AND EQUIPMENT
SAFETY POINTSSAFETY POINTS
* BLOCK WORKING UNITS - IF TO BE WORKED ON IN RAISED POSITION.
* PARK MACHINE WHERE NOT EASILY ACCESSIBLE TO
CHILDREN.
* NEVER WORK ON A MACHINE WHILE ENGINE IS RUNNING.
* BLOCK WORKING UNITS - IF TO BE WORKED ON IN RAISED POSITION.
* PARK MACHINE WHERE NOT EASILY ACCESSIBLE TO
CHILDREN.
* NEVER WORK ON A MACHINE WHILE ENGINE IS RUNNING.
* NEVER CHECK LEAKS BY HAND - USE ROLLED PIECE OF
PAPER.
* NEVER USE LEAKING PIPES OR DAMAGED CONNECTIONS.
* USE CORRECT LIFTING GEAR ( JACKS, CRANE - ETC).
* DURING TRANSPORTATION OF MACHINE , LOCK CYLINDER
STOPS TO HOLD UNITS.
* LOWER HYDRAULIC UNITS ON THE GROUND BEFORE
LEAVING THE MACHINE.
* NEVER CHECK LEAKS BY HAND - USE ROLLED PIECE OF
PAPER.
* NEVER USE LEAKING PIPES OR DAMAGED CONNECTIONS.
* USE CORRECT LIFTING GEAR ( JACKS, CRANE - ETC).
* DURING TRANSPORTATION OF MACHINE , LOCK CYLINDER
STOPS TO HOLD UNITS.
* LOWER HYDRAULIC UNITS ON THE GROUND BEFORE
LEAVING THE MACHINE.
REASONS FOR GREAT FRICTION CREATIONREASONS FOR GREAT FRICTION CREATION
. TOO MANY BANDS
. UNNECESSARY LONG LINES
. HIGH VELOCITY
. COLD OIL
. TOO MANY BANDS
. UNNECESSARY LONG LINES
. HIGH VELOCITY
. COLD OILEFFECTS OF SPILLED OILEFFECTS OF SPILLED OIL
. RISK OF SLIPPING
. RISK OF SKIN IRRITATION
. ENVIRONMENTAL DAMAGE (VEGETATION)
. POISONOUS IF SWALLOWED
. CONTAMINATION OF WATER
. RISK OF SLIPPING
. RISK OF SKIN IRRITATION
. ENVIRONMENTAL DAMAGE (VEGETATION)
. POISONOUS IF SWALLOWED
. CONTAMINATION OF WATER
* DON’T REMOVE CYLINDERS UNTIL WORKING UNITS ARE
ON THE GROUND.
* RELEASE HYDRAULIC PRESSURE BEFORE DISCONNECTING
OIL LINE.
ACCUMULATORS
* ALWAYS FILL WITH DRY NITROGEN GAS ( INERT GAS ).
* NEVER FILL WITH OXYGEN OR AIR.
* NEVER OVER FILL - STICK TO MANUFACTURE’S SPECS.
* DON’T REMOVE CYLINDERS UNTIL WORKING UNITS ARE
ON THE GROUND.
* RELEASE HYDRAULIC PRESSURE BEFORE DISCONNECTING
OIL LINE.
ACCUMULATORS
* ALWAYS FILL WITH DRY NITROGEN GAS ( INERT GAS ).
* NEVER FILL WITH OXYGEN OR AIR.
* NEVER OVER FILL - STICK TO MANUFACTURE’S SPECS.
* RELEASE HYDRAULIC PRESSURE BEFORE REMOVING
ACCUMULATOR.
* RELEASE HYDRAULIC AND GAS PRESSURE BEFORE
DISMANTLING ACCUMULATOR.
* RELEASE HYDRAULIC PRESSURE BEFORE REMOVING
ACCUMULATOR.
* RELEASE HYDRAULIC AND GAS PRESSURE BEFORE
DISMANTLING ACCUMULATOR.
