JLG 600SC_660SJC Service Manual - Manual (Page 94)

SECTION 5 - CAT CHASSIS (S/N 0300128000 TO PRESENT)
5-2 – JLG Lift – 3121157
GREATER THAN 10 µ M IN THE HYDRAULIC CIRCUIT.
THE CONTAMINATION LEVEL OF HYDRAULIC FLUID HAS A GREAT
INFLUENCE ON LIFE-SPAN OF A MOTOR. POOR CONTROL OF
CLEANLINESS OF HYDRAULIC FLUID MAY CAUSE SEIZURE AND
EARLY WEAR IN EACH SLIDING SURFACE, RESULTING IN AN
INABILITY OF THE MOTOR TO OPERATE.
FOR TYPE OF HYDRAULIC FLUID IN USE, USE RECOMMENDED
HYDRAULIC FLUIDS. KEEP THE TEMPERATURE AND VISCOSITY OF
HYDRAULIC FLUID IN USE WITHIN THE USAGE CONDITION LIMIT.
USE OF HYDRAULIC FLUID WITH THE TEMPERATURE AND VISCOS-
ITY BEYOND THE USAGE CONDITION LIMIT MAY CAUSE EARLY
WEAR OF EACH SLIDING SURFACE AND SEIZURE, RESULTING IN
AN INABILITY OF THE MOTOR TO OPERATE.
IF YOU USE FIRE-RESISTANT HYDRAULIC FLUID, OR USE HYDRAU-
LIC FLUID BEYOND THE PERMISSIBLE OIL TEMPERATURE, PLEASE
CONTACT US.
USAGE AREA OF THE MOTOR MAY BE LIMITED.
Lubricating Oil for Reduction Gears
For lubricating oil for reduction gears, use recommended
lubricant, and change lubricant according to the following
interval.
Recommended lubricant: Diamond Hypoid Gear Oil #90
from Mitsubishi Oil (equivalent to API category GL-4#90)
Interval of oil change
• Initial oil change: 100 - 250 hours of operation
• Succeeding oil change: every 1000 - 1500 hours of
operation
Periodic oil change extends life-span of reduction gears,
and ensures stable performance.
Hydraulic fluids with the oil of different property should not
be mixed. When changing hydraulic fluid type, flush the
reduction gears.
KEEP THE TEMPERATURE OF LUBRICANT FOR THE REDUCTION
GEAR WITHIN THE USAGE CONDITION LIMIT.
FAILURE TO DO SO WILL DRASTICALLY SHORTEN THE LIFE-SPAN
OF THE REDUCTION GEAR, CAUSING EARLY BREAKAGE.
Operation of Motor
DO NOT GENERATE CAVITATION.
EXCESSIVE ROTATION SPEED OF THE MOTOR MAY CAUSE SEIZURE
ON EACH SLIDING SURFACE.
AS THE PRESSURE IN THE CIRCUIT BECOMES NEGATIVE, THE
INSIDE MAY BE BROKEN.
AS THE PRESSURE IN THE CIRCUIT BECOMES NEGATIVE, THE
MOTOR CANNOT BE CONTROLLED, WHICH MAY LEAD TO A SUD-
DEN DROP OF LIFTED LOAD OR RUNAWAY.
WHEN OPERATING THE MOTOR, BE SURE TO OBSERVE INSTRUC-
TIONS DESCRIBED IN THE OPERATING MANUAL.
OPERATE THE MOTOR WITHIN THE SPECIFICATION RANGE. IF THE
MOTOR IS OPERATED BEYOND THE SPECIFICATION RANGE,
PLEASE CONTACT US.
BEFORE OPERATING THE MOTOR, LUBRICATE HYDRAULIC FLUID
INTO THE MOTOR CASE FROM THE DRAIN PORT ON THE UPPER
SIDE.
OPERATION OF THE MOTOR WITH THE MOTOR CASE BEING EMPTY
MAY CAUSE BREAKAGE OF THE INSIDE OF THE MOTOR, LEADING
TO AN INABILITY OF THE MOTOR TO OPERATE.
KEEP THE PRESSURE WITHIN THE USAGE CONDITION LIMIT.
FAILURE TO DO SO MAY NOT ONLY SHORTEN THE LIFE-SPAN OF
THE MOTOR DRASTICALLY, BUT ALSO BREAK STRUCTURAL COM-
PONENTS.
BE SURE TO KEEP THE ROTATION SPEED IN USE WITHIN THE
PRODUCT SPECIFICATION RANGE. KEEP THE FLOW RATE WITHIN
THE USAGE CONDITION LIMIT.
FAILURE TO DO SO MAY CAUSE SEIZURE ON EACH SLIDING SUR-
FACE, RESULTING IN BREAKAGE OF THE INSIDE OF THE MOTOR.
KEEP THE REVERSE INPUT TORQUE WITHIN THE USAGE CONDI-
TION LIMIT.
FAILURE TO DO SO MAY CAUSE BENDING BREAKAGE OF GEARS OF
THE REDUCTION GEAR AND BREAKAGE OF STRUCTURAL COMPO-
NENTS.
EXERT EXTERNAL RADIAL LOAD ON THE SPECIFIED LOCATION. DO
NOT EXERT LOAD THAT EXCEEDS THE PERMISSIBLE RANGE.
FAILURE TO DO SO WILL DRASTICALLY SHORTEN THE LIFE-SPAN
OF THE REDUCTION GEAR.
IN ADDITION, EARLY BREAKAGE OF THE MAIN BEARING WILL
OCCUR.