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G. COOLING SYSTEM (See Page 7-42)
1. Check Coolant Level
2. Check and Adjust Fan Belt Tension
3. Change Coolant
4. Clean Radiator Core
NOTE:
Shorten maintenance interval in dusty work site.
For the first time only.
NOTE: When genuine Hitachi long life coolant (LLC) is used, replace it every two years (in autumn) or after
2000 operating hours, whichever comes first.
IMPORTANT: Use fresh water or tap water for the coolant. Avoid using strong acid or alkaline water. Be
sure to use genuine Hitachi long life coolant (LLC).
H. ELECTRICAL SYSTEM (See Page 7-47)
I. MISCELLANEOUS (See Page 7-51)
Parts
1.Check Bucket Teeth
2.Replace Bucket
3.Adjust Track Sag (Rubber Crawler) and
Check for Damage
4.Replace Rubber Crawler
5.Check Track Sag (Steel Crawler)
(Optional)
6.Check and Replace Seat Belt
7.Check Air Conditioner (Cab Equipped
Machine)
8. Clean and Replace Air Con-
ditioner Re-circulation Filter. Replace
9. Clean Cab Floor
10. Check Injection Nozzle
11. Check and Adjust Value Clearance
12. Check Injection Timing
13. Measure Engine Compression Pressure
14. Check Starter and Alternator
15. Check Radiator Cap
16. Check Tightening Torque of Bolts and Nuts
NOTE: Consult your authorized dealer for inspection/maintenance of items with mark
chart is affixed on the tank access cover.
★★
For the first time only.
MAINTENANCE
Parts
ZX27U
,
-2
ZX30U
, ZX35U
-2
ZX40U
, ZX50U
-2
Outside
Interior
Clean
Clean
Adjust
Quantity
1
1
6.0 L
(1.6 US gal)
-2
6.6 L
-2
(1.7 US gal)
1
1
Quantity
8
50
–
1
2
2
2
–
–
–
Replace after cleaning approx. 6 times.
–
–
–
–
Or every year
–
Or every 2 years
–
–
–
–
–
7-9
Interval (hours)
8
50
100
250
Twice a years (in spring and autumn)
When changing coolant
Interval (hours)
100
250
500 1000 1500 2000 3000
As required
As required
Every 3 years (Replace)
As required
♦
As required ♦
♦
♦
. The recommended oil
500 1000 2000
♦
♦
♦
♦
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