Danfoss 51 Series Servicehandleiding - Pagina 6
Blader online of download pdf Servicehandleiding voor {categorie_naam} Danfoss 51 Series. Danfoss 51 Series 11 pagina's. Bent axis motors
Ook voor Danfoss 51 Series: Instructies Servicekit (2 pagina's)
Pagina afdrukken
Service
Manual
Series 51
and
51-1
Motors
Service
Manual
Troubleshooting
Motor
operates
normally
in
one
direction
only
lmproper output
speed
Low
outputtorque
Check
Cause
Corrective
action
3.
Shaft
coupling
Loose
shaft
coupling
creates excess noise.
Replace
loose shaft coupling.
Replace
or repair
motor
if
shaft splines
are
worn
excessively.
4.
Shaft
alignment
Misaligned
shafts
create
excessive
noise and
damage
motor.
Correct shaft
misalignment.
Check
Cause
Corrective
action
1
Charge pressure
lf charge
pressure is
low in one direction,
the loop
flushing shuttle
spool may
be
sticking
to
one
side.
Measure
charge pressure
in
forward
and
reverse.
lf
pressure
drops in one direction, inspect and repair
loop
flushing shuttle
spool.
2,
Motor
control
lf
controlshifts
motorto
minimum
displacement in
one
direction, motor
may not
have
enough
torque
to
operate.
Measure
maximum
and
minimum
servo
pressures
to
check
control operation.
Repair
control
or correct
input
signal if
necessary.
3.
Pressure
compensator
control
lf
pressure
compensator operates
in
one
direction
only,
the motor will
stay
at
minimum
displacement
in
the
otherdirection
Check
brake pressure defeat spool.
lt
may
be
sticking
or receiving an
improper
signal.
Repair
spool
or
correct
input
signal.
Check
Cause
Corrbctive
action
1
Oillevelin
reservoir
Insufficient
hydraulic
fluid will
reduce system
efficiency.
Fill
reservoir
to proper
level.
2.
Threshold
setting
lmproper threshold
setting
will
cause
motor
to
have
wrong
displacement for given signal.
Check
th
reshold
setting.
Refer
to control
service
manual for
adjustment
procedure.
3.
P
ressu
re
compensator setting
lmproper
pressure
compensator
setting
shifts
motor
displacement
at
wrong
pressure.
Check pressure
compensator setting.
Adjust
if
necessary.
4.
Controlspoolor
piston
Pressure
compensator piston or
spoolsticking
holds
motor
at
wrong
displacement.
Check pressure
compensator
piston
orspool.
Repair
or replace if needed.
5.
Controlorifices
Blocked or restricted orifice
causes
motor to shift
improperly.
Remove,
inspect, and
clean
allorifices.
6.
Control
piston
Sticliy
control
piston
causes
motorto
shift
improperly.
Check
control piston for
proper operation.
Repair
if
necessary.
7.
Control
input
signal
lmproper input
signal
causes
motor
to shift
improperly.
Correct
control input
signal.
8.
lnternal leakage
Excess
internal
leakage causes
lower charge
pressure and affects system performance
including
output
speed.
Install
loopflushing
defeat
option
and
monitor
case
flow-
lf
case
flow
is
excessive,
motor
may require
major
repair.
Contact
your
Danfoss Service
Provider.
Check
Cause
Corrective,action'
I
System
pressure
Low system pressure at
motor
reduces
output
torque.
Measure
system pressure
at
the motor.
lf
the
pressure
limiter or relief valve
setting
is
low, increase
setting
to
the proper level.
2.
Charge pressure
Low loop
flushing
relief valve
setting
may cause
improper
supply
pressure
to motor control.
Measure
charge pressure
in
forward
and
reverse.
Adjust loop
flushing
relief valve
setting
if
necessary.
3.
Pressu re
compensator
setting
High
pressure
compensator setting
causes
improper motor
displacement for
torque
required.
check and
adjust
pressure
compensator
setting.
t
1
008557 .
Rev BA .
June
2014