All trucks
Technical Handbook
Hydraulic Cylinders
Service
9279 02-09
Publ. Gr. S.
1370
Lubrication
1. Within the actual hydraulic system - never anything other than
the normal hydraulic fluid used in the hydraulic system.
2. On the cylinder head thread - use copper paste (e.g., Moly-
cote CU 7439). Make sure that the paste does not enter the
system.
3. In areas where there is a risk of condensation building up -
grease with a thin layer of copper paste in the sealing groove
of the cylinder head, in order to prevent condensation. Con-
densation causes rust formation that can corrode the sealing
groove and cause leakage.
Apply the copper paste with a finger.
4. If any copper paste comes outside the sealing groove - wipe
clean with lint free paper. Never use cotton waste
Lubricating single action cylinders
1. This type of cylinder does not have any hydraulic fluid supply
on the piston rod side. If a cylinder normally operates over
only a limited part of the piston stroke, there is a risk for cor-
rosion in the upper part of the cylinder.
2. Unscrew the breather filter.
3. Spray 300-500 ml of hydraulic fluid into the filter connection.
4. Run the cylinder to the limits of the piston stroke a number of
times until no more hydraulic fluid is forced out of the breather
filter connection point.
Daily lubrication, all cylinders
Run all cylinders to the piston stroke limit so that the whole of the
cylinder is lubricated.
KL1017
1
2
3
5
1. Wiper
2. Areas at risk for condensation
3. Piston rod seal
4. Rust formation on sealing surfac-
es causes leakage
5. Cylinder head
4
KL1006
1. Normal working area
2. Breather filter
3. Filter connection point
4. Area at risk from corrosion
1
2
3
4
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