Hyundai HX145 LCR, Manual

Page: 165 / 702

3-4
3. DRAIN CIRCUIT 3. DRAIN CIRCUIT
Besides internal leaks from the motors and main pump, the oil for lubrication circulates. These oil have
to be fed to the hydraulic tank passing through drain filter.
When the drain oil pressure exceed 1.5 kgf/cm
2
(21 psi), the oil returns to the hydraulic tank directly.
TRAVEL MOTOR DRAIN CIRCUIT TRAVEL MOTOR DRAIN CIRCUIT
Oil leaked from the right and left travel motors comes out of the drain ports provided in the
respective motor casing and join with each other. These oils pass through the turning joint and
return to the hydraulic tank after being filtered by drain filter.
SWING MOTOR DRAIN CIRCUIT SWING MOTOR DRAIN CIRCUIT
Oil leaked from the swing motor returns to the hydraulic tank passing through a drain filter.
MAIN PUMP DRAIN CIRCUIT MAIN PUMP DRAIN CIRCUIT
Oil leaked from main pump returns to the hydraulic tank passing through drain filter.
1) 1)
2) 2)
3) 3)
Travel motor Swing motor
Turning
joint
Dr
Main pump
Drain filter
Check valve
1.5kgf/cm
2
Hydraulic
oil tank
Dr#, dr#
From return line
21093CI02