Hitachi ZAXIS 30U-5N User Manual

MAINTENANCE
7-59
Replace Fuel Pre-Filter Element (ZX50U-5N, 60USB-
5N)
--- every 500 hours or when fuel filter clogging lamp
is lit
IMPORTANT:
Be sure to use only genuine Hitachi elements for
the fuel pre-filter element. Failure to do so may
deteriorate the engine performance and/or shorten
the engine service life. Please be noted that all
engine failures caused by using other manufacturers'
elements are excluded from Hitachi Warranty Policy.
Procedures:
1. Parkthemachinefollowingthesameproceduresas
describedonpage7-6forpreparationforinspectionand
maintenance.
2. Closecock(2).
3. Placea1literorlargercapacitycontainerunderdrain
plug (4).
4. Loosenairbleedplug(1)anddrainplug(4).Drainfuel
until fuel does not flow out of the filter.
5. Removefiltercase(3)byusingaspecialtool.
6. Removethefilterelement.
7. ReplacetheO-ringwithnewones.
8. InstallanewelementandO-ring.Tightenfiltercase(3)
by using a special tool.
Tightening Torque : 30±3N·m(2.8to3.4kgf·m,21to25
lbf·ft).
9. Tighten air bleed plug (1) and drain plug (4).
10. Opencock(2).
11. BleedAirfromtheFuelSystem
After replacing the fuel filter element, bleed air from the
fuel supply system.
 (Referto"BleedAirfromtheFuelSystem".)
FuelPre-Filter
1
2
3
4
MADG-07-001
MADG-07-002

Hitachi ZAXIS 30U-5N Specifications

General

Brand	Hitachi
Model	ZAXIS 30U-5N
Category	Excavators
Language	English