jcb JS300 Service Manual page 253

problems in the control valve, premature wear of the hydraulic pump and damage to the hydraulic system as
a whole.
The servicing of the hydraulic oil and filters must be done more frequently according to the percentage of total
operating hours involving use of the breaker, crusher or pulverizer. When a breaker, crusher or pulverizer is
installed, make sure that the oil and filters are changed at the intervals shown in the table below.
The hydraulic oil must be sampled and checked for contamination and degradation at the intervals shown.
Contact your JCB dealer who will have the facilities to do these tasks and make sure that the hydraulic system
is correctly maintained.
Item Use Frequency
Greater than 75% 50-75%
10h 100h 600h
Hydraulic oil
Return filter (1)
Suction filter
(1)
Drain filter (1)
Servo filter (1)
Breaker in-line
filter (1)
Hydraulic oil Every 200 hrs
sampling
(1) The filters must be changed whenever the period of breaker/crusher/pulverizer use exceeds 100hrs,
regardless of the total number of hours the machine has worked
Periodic Replacement of Safety Related Components
Routinely replace the important components concerned with safety. It is difficult to determine by a visual
inspection or from operation the service life of specific components, so routinely replace them as important
components every 2 years.
If any abnormality is found with any of these components before the replacement time, repair or replace them
as you would normally do.
When you replace the hoses, if the hose clamps are deformed or cracked, replace the hose clamps at the
same time as the hoses.
Regarding the hoses not included in the routine replacement of safety components, do the inspection described.
Tighten, replace, etc, when any abnormality is found. Refer to Table 15.
Replace the O-rings, gaskets at the same time as the hoses. Contact your JCB dealer for the replacement of
the safety components. Do an inspection of the hydraulic hoses and the fuel hoses at the routine inspection
described. Refer to Table 15.
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Table 11.
Check the oil level, add more oil as required
Change
Clean
Table 12.
25-50%
10h 200h 1,000h 10h 300h 1,500h 10h 600h 3,000h 10h 800h 4,000h
Every 200 hrs Every 300 hrs
9831/1100-2
Maintenance
Maintenance Schedules
10-25% Less than 10%
Every 600 hrs Every 800 hrs
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