Part No. 139378
Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
4 - 25
June 2011
Section 4 • Repair Procedures
REV A
SECONDARY BOOM COMPONENTS
28 Position a lifting strap from an overhead crane at
the center of the control box side upper
secondary compression arm.
29 Use a soft metal drift to remove the upper
secondary boom compression arm pivot pins
and remove the compression arm from the
machine. Repeat this step for the hydraulic tank
side upper secondary compression arm.
Crushing hazard. The upper
secondary compression arm could
become unbalanced and fall when
removed from the machine if not
properly supported by the
overhead crane.
30 Close the hydraulic tank shutoff valve. Tag,
disconnect and plug the hydraulic hose from
the hydraulic tank shutoff valve.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to squirt
or spray.
31 Open the valve on the hydraulic tank and drain
the oil into a container of suitable capacity.
Refer to Section 2,
Specifications
.
Bodily injury hazard. Beware of
hot oil. Contact with hot oil may
cause severe burns.
32 Tag, disconnect and plug the hydraulic hose
from the hydraulic tank return filter housing.
Cap the fitting on the filter housing.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to squirt
or spray.
Bodily injury hazard. Beware of
hot oil. Contact with hot oil may
cause severe burns.
33 Remove the hydraulic tank mounting fasteners.
Remove the hydraulic tank from the machine.
34 Open the ground controls side turntable cover.
35 Remove the terminal strip cover retaining
fasteners. Remove the cover.
36 Remove the terminal strip retaining fasteners.
Do not disconnect the wiring.
37 Remove the plastic plug in the bulkhead to
access the secondary boom lift cylinder rod-end
pivot pin.
38 Remove the pin retaining fastener from the rod
end of the secondary boom lift cylinder. Use a
soft metal drift to remove the pin through the
access holes in the bulkheads. Secure the
cylinder from moving.
39 Remove the pin retaining fastener from the
lower pivot pin on the compression link. Use a
soft metal drift to remove the pin.
Summary of Contents for Z-30/20N
Page 1: ......
Page 148: ...6 46 June2011 Section 6 Schematics 6 45 Power Cable Wiring Diagram...
Page 149: ...6 47 Section 6 Schematics June2011 6 48 Drive Contactor Panel Wiring Diagram...
Page 152: ...6 50 June2011 Section 6 Schematics Manifold and Limit Switch Wiring Diagram 6 49...
Page 153: ...6 51 Section 6 Schematics June2011 6 52 LVI BCI Option Wiring Diagram...
Page 156: ...6 54 June2011 Section 6 Schematics 6 53 Charger Interlock Option...
Page 157: ...6 55 Section 6 Schematics June2011 6 56 CTE Option CE Models...
Page 160: ...6 58 June2011 Section 6 Schematics Hydraulic Schematic 6 57...
