1-12
Published 01-29-2014, Control # 496-00
INTRODUCTION TMS800E SERVICE MANUAL
Hydraulic Systems
Cleanliness
Contaminants in a hydraulic system affect operation and will
result in serious damage to the system components. Dirty
hydraulic systems are a major cause of component failures.
Keep the System Clean
When removing components of a hydraulic system, cover all
openings on both the component and the crane.
If evidence of foreign particles is found in the hydraulic
system, flush the system.
Disassemble and assemble hydraulic components on a
clean surface.
Clean all metal parts in a nonflammable cleaning fluid. Then
lubricate all components to aid in assembly.
Sealing Elements
Inspect all sealing elements (O-rings, gaskets, etc.) when
disassembling and assembling the hydraulic system
components. Installation of new elements is always
recommended.
Hydraulic Lines
When installing metal tubes, tighten all bolts finger-tight.
Then, in order, tighten the bolts at the rigid end, the
adjustable end, and the mounting brackets. After tubes are
mounted, install the hoses. Connect both ends of the hose
with all bolts finger-tight. Position the hose so it does not rub
the machine or another hose and has a minimum of bending
and twisting. Tighten bolts in both couplings.
Due to manufacturing methods there is a natural curvature to
a hydraulic hose. The hose should be installed so any bend
is with this curvature.
Fatigue of Welded Structures
Experience has shown that highly stressed welded
structures when repeatedly subjected to varying stresses
caused by twisting, shock, bending, and intentional and/or
unintentional overloads, often become subject to weld
cracking which may be attributed to fatigue of the welded
joint. This condition is not uncommon in construction
equipment.
Equipment should be periodically inspected for evidence of
weld fatigue. The frequency of these inspections should be
commensurate with the age of the equipment, the severity of
the application, and the experience of the operators and
maintenance personnel. The following are known high stress
areas applicable to Grove cranes, and a visual inspection of
these areas should be made part of an owner’s planned
preventive maintenance program:
• Power Telescope Boom - wear pad retaining structures,
hydraulic cylinder attaching points, boom pivot shaft
retaining structures.
• Outrigger pads, beams, boxes and attachment
structures.
• Main frames - generally in the area of doubler plates and
crossmembers; at the junction of front and rear frame
members on truck cranes.
• Turntable bearing connection (where bearing plate is
welded to the crane superstructure or chassis).
• Counterweight support structures.
• Chassis axle and suspension mounting structures.
• Hydraulic cylinder end connections.
The above is provided only as a guide, and your inspection
plan should not be limited to the areas listed. A thorough
visual inspection of all weldments is good practice.
Anyone requiring more detailed inspection instructions and/
or repair procedures may request same by contacting your
local Grove distributor.
Loctite®
Always follow the directions on the Loctite® container as not
all Loctite® types are suitable for all applications.Various
types of Loctite® are specified throughout the Service
Manual.The following types of Loctite® brand adhesives are
available from the Manitowoc Crane Care Parts Department
or your local Grove Manitowoc distributor.
Application of Medium Strength Loctite®
NOTE: The fastener may be re-used; the adhesive may be
re-applied over cured adhesive residue.
The following procedure covers the proper application and
curing method for medium strength Loctite® adhesive/
sealant (Loctite® #243) and primer (Locquic Primer
DANGER
Exercise extreme care around pressurized hydraulic
systems. DO not work on a hydraulic system while it is in
operation or until all pressure is released.
DANGER
Loctite® type adhesives contain chemicals that may be
harmful if misused. Read and follow the instructions on
the container.
Reference Only
To Next Page
Loading...
Need help?
General
