Draining pressure oil system
Linkage (7)
Oil drain hose (061)
Oil drain plug (3p)
Filling pressure oil system
Oil reservoir (2)
Lever on level control unit
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remove, install at lever on level control unit.
attach, remove at oil drain plug (3p) on level
control unit (3).
open slowly, whilst catching the oil in a
clean container. Then retighten oil drain plug
(3p),
14 Nm.
fill hydraulic oil into the oil reservoir using
funnel 126 589 12 63 00, until the oil level is
between "min" and "max" markings on the
oil dipstick.
press into position "Fill". Install linkage (7),
replace self-locking bolts, 10 Nm.
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Engine
start and allow to run for approx. 30 seconds
in the middle speed range, then switch off
engine (note information in No. 8)
check in oil reservoir, the oil level must be
between the "min" and "max" markings when
the engine is not running.
Oil level
Special tool
Service products and capacities
Hydraulic fluid
Total capacity of system
see Specifications for Service Products, Page
343
(1.0 liter can, Part No. 000 989 91 03/10)
approx.
2.0 l
Scope of work
Draining pressure oil system
1 If the linkage is fitted. Remove linkage
(7) at lever on level control unit.
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Notes
Designations on level control unit
A=Model 140 with level control on rear axle
B= Model 140 with level control on rear axle
and ADS.
Model 140 with level control on rear axle
and ASD.
3 Level control unit
3m
Connector
3p Oil drain plug
P Pressure line, pressure oil pump - level
control unit
S1
Pressure line, level control unit -
accumulator
S2 Connection for oil drain plug
T Return line, level control unit - oil reservoir
Modified fluid drain plug on level
controller
A new fluid drain plug (3m) was installed at
connection "S2" on the level controller. The
earlier connection fitting (3m) was deleted at
the same time. Tightening torque for fluid
drain plug: 14 Nm.
A = Version installed up to 9/92
B = Version from 10/92 onward
3m
3p
Connection fitting
Fluid drain plug
2 Attach oil drain hose (061) to oil drain
plug (3p) on the level control unit (3).
3 Slowly open oil drain plug (3p) whilst
collecting the oil in a clean container. Then
retighten oil drain plug, 14 Nm.
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Filling pressure oil system
4 Use funnel with strainer (060) to fill oil
reservoir (2) with oil collected.
Note
Only re-use clean oil.
5 Check oil level in oil reservoir, top up if
necessary. To fill the system when spring
struts are empty the oil level should be
approximately at the maximum marking (a).
6 Move lever on level control unit into
position "Fill" and allow engine to run at
medium speed for approx. 30 seconds.
F=Fill
L=Drain
7 Install linkage rod (7) using new selflocking hexagon bolts, 10 Nm.
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8 Check oil level in oil reservoir (2) when
engine is not running and correct if
necessary. When the system is operational
the oil level should be between markings
"max." and "min" at curb weight. If the
vehicle is fully laden the oil level is thus
below the "min" marking (no longer visible on
dipstick).
Note
Only use approved hydraulic fluids.
M
If during repair work the oil reservoir has
been emptied or the tandem pump replaced
or high pressure extending hose unscrewed,
the pump must be bled.
For this step, when the engine is running
press the lever of the level control unit into
position "Empty" or "Neutral" to ensure the oil
returns to the oil reservoir (this is already the
case on a raised vehicle). If no oil is supplied
to the oil reservoir on ASD vehicles, also
hold the high pressure extending hose
disconnected at the steel line in a container
until no bubbles appear in the escaping oil.
Then repeat the work steps Nos. 4 - 8.
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