Hyundai r35z-7 Workshop Manual page 200

7)
MACHINE MAKES A CURVED TRAVEL OR DOES NOT TRAVEL AT ALL WHEN TRAVEL
AND ATTACHMENT OPERATIONS ARE EXECUTED AT THE SAME TIME
Is select valve
YES
normal?
Is travel lever
operate
normal?
Is filter in pilot
piping between
gear pump and
NO
control valve not
clogged?
YES
NO
YES
YES
Is gear pump
delivering oil?
NO
NO
5-17
Select valve is
faulty.
Is pilot relief NO
Pilot relief valve is
valve normal?
defective.
Gear pump is
broken.
Cause Remedy
Normal.
Repair or
replace.
Remove dirt on
pilot line filter.
Disassemble
and repair or
replace.
Disassemble
and repair.