Initial
11
2
13
10
4
9
5
7
2
OFF
ON
8
6
3
12
U27-4 EXCAVATOR (NA VERSION)
1,14
18
23
28
27
29
30
16
17
20
19
15
22
21
24
U27-4 EXCAVATOR (NA VERSION)
Item
Contents
Interval
Note
No.
Drive unit oil
Change
Initial 50 hrs
1
Initial oil change.
Fuel tank, water separator
Drain
2
Drain water from the tank and water separator.
Battery condition
Check
50 hrs
3
Check the battery conditions with the indicator.
Greasing swing bearing teeth
Grease
4
Replenish grease to the grease nipple by a grease gun.
Fan belt tension
Adjust
200 hrs
5
Press the fan belt down in the middle, with a force of approx. 7 kg (15.41 lbs).
The belt tension is correct if it deflects about 7 mm (0.28 in.).
Radiator hoses and clamps
Check
6
This check should be done every 200 hours or every 6 months, whichever comes
first.
Fuel line and Intake air line
Check
7
Clean the outer element. Do not remove the inner-element.
Air filter element (outer element)
(*1)
Clean
8
The element should be cleaned more frequently if the machine is used in extremely
dusty areas.
Greasing swing ball bearing
Grease
9
Replenish grease to the grease nipple by a grease gun.
Lubrication of the pilot valve
Grease
250 hrs
10
Grease the tip of the push rod and the rotating part of the link.
Engine oil
Change
500 hrs
11
Regardless of the service hours, an engine oil change is due every 1 year.
Engine oil filter cartridge
Replace
12
Always check the oil level when replacing the filter.
Fuel filter cartridge
Replace
13
The fuel system must be purged of air after the replacement.
Drive unit oil
Change
14
Change drive unit oil every 500 hrs or at least once a year.
Breather filter
Replace
15
Always check the oil level when replacing the filter.
Hydraulic return filter element (*2)
Replace
16
Hydraulic pilot filter element
Replace
1000 hrs
17
O-ring can’t be reused.
Hydraulic oil (*2)
Change
18
Before these maintenance, stop the machine on flat ground and lower the bucket
to the ground.
Hydraulic suction filter element
Replace
19
Air filter element (inner and
outer element)
Replace
1000 hrs or
once a year
20
Shorten the replacement period if the machine is used in dusty or sandy areas.
Fuel injection nozzle
Check
1500 hrs
21
Consult your local KUBOTA dealer for this service.
Front idler and track roller oil
Change
2000 hrs
22
Contact your KUBOTA dealer for details.
Alternator and starter motor
Check
23
Injection pump
Check
3000 hrs
24
Consult your local KUBOTA dealer for this service.
Electrical wiring and fuses
Check
Every year
25
Check the terminals for proper connections.
Electrical circuit
Check
26
Check the electrical circuitry for disconnections, shorts or loose terminals.
Radiator hoses and hose clamps
Replace
Every 2 years
27
Replace radiator hoses and hose clamps every two years.
Radiator coolant
Change
28
In case of long life coolant.
Fuel hoses and hose clamps
Replace
29
Replace the hoses and clamps.
Intake air line
Replace
30
Replace the hoses and clamps, if necessary.
Normal excavator work
Hammer work portion
20%
40%
60%
More than 80%
(*2) When using a hydraulic breaker, the interval of changing hydraulic oil becomes short as follow.
(*1) Clean and replace the air filter more frequently if used under dusty conditions. When the filter is very dirty from dusty conditions,
replace the filter.
Hydraulic oil
Every 1000 hrs
Every 800 hrs
Every 400 hrs
Every 300 hrs
Every 200 hrs
Every 500 hrs
(250 hrs after first operation)
Every 200 hrs
Every 100 hrs
Hydraulic return filter element
REGULAR MAINTENANCE
KiSC issued 03, 2018 A
