MAKING
MODERN LIVING
POSSIBLE
Service
Manual
Series
42
Property of American Airlines
powersol
utions.da
nfoss.com
I r'jll
ir5l/l
Service
Initial
General
Manual
Start-Up Procedure
Series 42
Follow
this
which
the
,.S
Warninq
Axial Piston
procedure
pump
has
been
when
Closed
starting-up
removed.
Circuit Pumps
a new
Series 42 installation
or when restarting
installation
an
in
Start-up
Unintended
protect
To
mcvement
against
of
the rnachine
unintended
or mechanism
movement,
secure the
may
cause injury
machine or
to the
technician
disable/disconnect
or bystanders.
the mechanism
while servicinq.
Prior
to installing
components
the
(reservoir,
pump,
hoses,
inspect
for
damage
valves, fittings,
incurred
heat
during shipping.
exchanger,
etc.)
are clean
Make
prior
certain
to filling
all system
with fluid.
procedure
1.
Connect
prime
the
r&
Incorrect
external oil
Fill
2.
the reservoir with
filter
3. Fill
the main
case
4. Fill
the
fittings
To
5.
ensure
6.
Install
Follow recommendations
procedures.
7. While
until
established,
down
8.
Operate
9. Check
10.
Shut
11.
Check
Property of American Airlines
The
pump
pump
the
mover.
fautior.r
sltaft alignment may
leakage.
pouring
into the reservoir.
pump
port.
drain
inlet
line leading
and
be certain it is free
pump
the
gauge
a
watching
system
the
pressure
increase
prime
port
at
the
mover,
the hydraulic
and
adjust
control settings
the
is now
prime
level in
readyfor
down
the fluid
prime
to the
result
recommended
Never
housing
pressure
with
from
the
of
stays filled with
M2
monitor
to
in
the vehicle/machine
gauge
builds
to full
system for
mover
normal
to
operating
determine
and remove
the reservoir
operation.
mover.
Ensure
in
damage
hydraulic
reuse
hydmulic fluid.
clean hydraulic
pump
to
oil, install
system
at M2,
levels
speed.
cause,
the
jog
and
restrictions
at least fifteen
as necessary
the
add
clean
pump
that
to drive
fluid. Always
fluid.
reservoir.
and
air
shaft is
shaft, bearings,
Pour
filtered
Check the inlet line
leak.
the case drain line
pressure
(minimum
lf the
pressure
during start
operator's
prime
the
take corrective
minutes
after installation.
pump
gauge.
mover
1
1 bar
does
under
filtered fluid if
properly
filter
fluid through
oil
in
the upper most
up.
manualfor
run
or
psil).
tl60
not maintain
action.
light
Refer
Replace
necessary.
aligned with
or
seal which
directly into
for
prime
at
the
Once system
system
Refer
to
load
conditions.
Adjustments.
to
plug
at
the shaft of
can
a 10 micron
the upper most
properfy
mover
lowest
Troubleshooting.
port
tightened
case drain
start
possible
pressure
pressure,
M2.
caLtse
absolute
port.
up
speed
is
shut
52010638
.
Rev
0300
.
July 20'15
Service Manual
Adjustments
Series 42
Frame
Axial Piston Closed
size cm3
Control
Lock
nut mm
Servo adjust
Lock nut torque
screw
N.m
mm
[in]
flbf.ft ]
Circuit Pumps
28132
MDC/EDC/HC-EDC
13
5
231171 40
NFP
17
7
[30]
4v51
MDC/EDC/HC-EDC
t7
7
40
[30]
NFP
17
7
40
[30]
Control n€ullal
adjustment for MDC and EDC/HC-EDC
Control neutral adjustment
contfolsetting
or move any
wurn,no
,A
The following
functiotr
and
llvstanders.
1. Disconnect
the
2.
Install
provides
part
of the control or swashplate mechanlsm
proceciure
discannected,
the externalcontrol
pump,
pressure
gauges
piston.
3.
Startthe
4. Loosen
5. Turn
on the servo
Turn
piston.
Turn
movement
indicate
6. While holding
prime
mover and run at
the control
adjustment
the
piston.
the screw
Mark
the
counterclockwise
position
the adjustment
produces
nearly
equal
the adjustment
neutral
tbf.ft].
7.
Stop
8.
Connect the external
pump.
prime
the
Reconnect
mover
the work
aligns the
a zero degree swashplate
requires
r,nrhile performing
etc.)
in the
pump
swashplate andthe
the vehicle/nrachine
(for
linkage
gauge ports
servo
normaloperating
screw
Mark
adjustment
(D014)
position
the
seal
clockwise untilone
of the
until the other
of the adjustment
screw
clockwise so that it is midway
constant
pressures.
and remove
control linkage
change for both directions,
(D014)
screw
pressure
the
(for
MDC)
function.
controlspoolso that a zeto angle
setting. Perform this adjustment wheneveryou
the
6rrocedure
MDC) or
lock nut
or afEr
to
be cjisabled
in
order to
controlsignalinput
M4 and
M5 to measure
speed.
(D015).
gauges
of
the
you
adJust
(wheels
prevent
registers
pump
the
raised
off the
injury
to
(for
EDC and HC-EDC)from
pressure
on
increase in
an
adjustment screw.
screw.
position,
in
gauges.
or
gauge
registers
between the marks.
so both the
torque the seal lock
Remove the
control
signal
an increase
pressure
plugs
(for
input
pressure
in
Adjustment
gauges
(D015)
nut
in
the
EDC
and
gauge ports.
HC-EDC)
adjust
neutral settlng.
the
the
ground,
pump
on
work
technician
servo
pressure
the servo
screw
should
N.m
to 04
to the
[30
Property of American Airlines
520L0638
.
Rev
0300
'July
201
5
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