Daewoo Solar 300LC-V, Manual

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S0707270K
Page 17
Swing Motor (Toshiba MFC200)
Torque is poor
and Abnormal
noise Sliding surface parts
worn or damaged Open inlet and outlet port of motor, apply pilot
pressure of 3.9 - 4.9 Mpa to brake release port, and
then check the turning of output shaft with torque of
about 30 - 40 Nm over one revolution smoothly.
If it does not turn smoothly with the torque described
above, it is necessary to disassemble and check it
because the possibility of damage is large.
Check the parts of the articles from (a) to (e) of
“Inspection Parts List” on page -18 and bearings and
replace if they are abnormal.
Setting pressure of relief
valve in circuit poor Check load pressure by pressure gauge.
Reset it to setting pressure.
Motor internal damaged Check whether metallic foreign material is in fluid drain
of motor and drain filter.
If metallic material is found, disassemble and check
motor internal because the possibility of its damage is
large.
Repair or replace damaged parts. Replace motor.
Air in fluid mixed Check fluid in tank and motor case.
Bleed air fully.
Fastening parts loose Check pipe laying parts, fastening part bolts, motor
fastening bolts, and each motor fastening part bolts.
Fasten suitable tightening torque.
Abnormal heat Motor sliding and rotating
parts stuck Check whether metallic foreign material is in motor
fluid drain and drain filter, and check the turning of
output shaft with torque of about 30 - 40 Nm over one
revolution smoothly.
If metallic material is found or it does not turn smoothly
with the torque described at left, it is necessary to
disassemble and check it because the possibility of
damage is large.
Repair or replace damaged parts. Replace motor.
Assembling parts
leaking O-ring damaged Replace O-ring.
Seal surface damaged Repair seal surface or replace seal.
Bolt loose Check bolts
Fasten suitable tightening torque.
Repair or Replace motor.
Oil seal leaking Oil seal lip part damaged
or worn Check pressure in case and drain quantity.
Shaft seal part damaged
or worn Pressure in case is made lower than 0.3Mpa. If drain
is high, disassemble and check it.
Pressure of case
abnormal Replace oil seal. Repair or replace damaged parts.
Replace motor assembly.
Problem Possible Cause Remedy