Terex S-60 J, Руководство по обслуживанию и ремонту

Страница: 54 / 131

Service and Repair Manual December 2019
Boom Components
42 S ® -60 J Part No. 1285305GT
4 Tag, disconnect and plug the boom lift cylinder
hydraulic hoses. Cap the fittings on the
cylinder.
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.
5 Using a suitable lifting device, secure the
barrel-end of lift cylinder.
6 Place a block of wood measuring
4x4x24 inches / 10x10x50 cm across the top
of the turntable bulkhead and below the
cylinder.
7 Remove the pin retaining fastener from the
boom lift cylinder barrel-end pivot pin.
8 Using a soft metal drift, remove the pivot pin.
Lower the cylinder onto the wooden block.
Crushing hazard. The lift cylinder
will fall if not properly supported
when the pivot pin is removed.
9 Adjust the lifting strap to the center of the lift
cylinder.
10 Remove the pin retaining fastener from the
boom lift cylinder rod-end pivot pin.
11 Using a soft metal drift, remove the pivot pin.
Note: Apply slight lifting pressure to the mid-pivot to
remove pressure from the pivot pin.
12 Carefully remove the boom lift cylinder from
the machine.
Crushing hazard. The lift cylinder
could become unbalanced and
fall if not properly supported and
secured to the lifting device.
4-4
Primary Boom Extension
Cylinder
The primary boom extension cylinder extends and
retracts the primary boom extension tube.The
primary boom extension cylinder is equipped with
counterbalance valves to prevent movement in the
event of a hydraulic line failure.
How to Remove the Primary
Boom Extension Cylinder
Bodily injury hazard. This
procedure requires specific repair
skills, lifting equipment and a
suitable workshop. Attempting
this procedure without these skills
and tools could result in death or
serious injury and significant
component damage. Dealer
service is strongly recommended.
Note: When removing a hose assembly or fitting,
the O-ring (if equipped) on the fitting and/or hose
end must be replaced. All connections must be
torqued to specification during installation. Refer to
Specifications, Hydraulic Hose and Fitting Torque
Specifications.
1 Raise the jib boom to a horizontal position.
2 Extend the boom until the extension cylinder
rod-end pivot pins are accessible in the
extension tube.
3 Raise the primary boom to a horizontal
position.
4 At the pivot end of the boom, remove the
cover from the end of the boom tube.
5 Remove the boom extend limit switch.