892-0000010B OM
298
Table 7.9.1 finished
Defect, external manifestation, cause Troubleshootin
Increased play of the steering wheel
Coned pins of hydraulic cylinders or steering
tie-rod are not tightened
Torque pins’ nuts from 180 to 200 Нꞏм secure
them with cotter-pins
Worn-out steerin
column splines shank Replace lower gimbal gear yoke
Worn-out steerin
column cardan shaft Replace cardan shaft
Spool recentering springs of dosing pump
have lost spring power or are broken
Contact the deale
. Replacement of springs, as-
sembly and check of operability should be is per-
formed only by maintenance department in accord-
ance with manufacturer’s instruction
1)
Not complete turn of drive wheels
Insufficient pressure in HSC hydraulic
system due to the following reasons:
- faulty adjustment of dosing pump pressure
relief valve (low pressure)
- Faulty feed pump
Contact the dealer. Adjust pressure relief valve for
the required pressure
1)
. Operation is performed
only by maintenance department.
Contact the dealer.
Increased FDA reducing gear steering
torque
Make repair of FD
Breakdown of feed pump
High pressure in HSC hydraulic system
due to the following reasons:
- Incorrect high-pressure hose connection
- locking of back-pressure valve or dosing
pump pressure relief valve (perhaps due to
dirt accumulation)
Connection should be carried out in strict corre-
spondence to operation manual
Contact the dealer. Rinse of dosing-pump compo-
nents is required. Assembly and check of opera-
bility should be is performed only by maintenance
department in accordance with manufacturer’s in-
struction
1)
1)
Considering baffling complexity and responsibility of dosing pump from the point of view
of steering system safety, its assembly and disassembly can be carried out only by ser-
vicing personnel of manufacturing company (or other authorized maintenance depart-
ment), properly trained, studying dosing pump design and service and dosing pump as-
sembly-disassembly manuals, and provided they have all required service tools, accesso-
ries and special hydraulic stand, ensuring adjustment and check of dosing pump parame-
ters and operability after the repairs have been made. Otherwise a person performing
dosing pump assembly and disassembly, replacement of parts and components or adjust-
ment of valves, as well as tractor owner, bears full responsibility for dosing pump nonop-
erability.
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