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Wear, tear and malfunctions!
The cleanliness of the hydraulic fluid has a considerable impact on the cleanliness
and life cycle of the valve. Any contamination of the hydraulic fluid will result in
wear and malfunctions. Particularly foreign particles may damage the valve.
▶
Always ensure absolute cleanliness.
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Install the valve in clean condition.
▶
Make sure that all connections, hydraulic lines and attachment parts are clean.
▶
Ensure that no cleaning agents are able to penetrate the hydraulic system.
▶
Only use seal kits as listed in chapter 10.6 "Spare parts".
1.
Before any assembly and disassembly work starts, the environment must be
cleaned so that no dirt can get into the oil circuit. Only fiber-free cloth or special
paper may be used for cleaning.
2.
Remove existing preservative agent.
3.
Check the valve contact surface for the required surface quality
(see "Data sheet 22280-XC"). Remove the protective plate from the valve and keep
it safe for returns in case any repairs become necessary later.
4.
Dry the valve connection surface using suitable cleaning materials.
5.
Check the seal rings at the valve connection surface for completeness. Other
sealants are not admissible.
6.
Check whether the pressure connecting line is connected with P and the return
line with T at the subplate.
Exchanging P and T may cause damage at the valve in case of pressurization.
7.
Place the valve on the contact surface.
Only use valve mounting screws with the thread diameters, screw lengths and
strength properties listed in chapter 7.6 "Required accessories".
Always fasten the valve with all 4 valve mounting screws as otherwise,
leak-tightness is not guaranteed.
8.
When using the subplates mentioned under 7.6 "Required accessories" or in
case of assembly on comparable cast iron installation surfaces, tighten all four
valve mounting screws with a tightening torque of 7 Nm ± 0.7 Nm (with a friction
coefficient of µ
= 0.09...0.14). This tightening torque refers to the maximum
total
admissible operating pressure.
If the valve is to be used at a reduced maximum pressure and in this connection
is to be mounted on connection surfaces of a different material, it might be
necessary to use a lower tightening torque in order to exclude any damage.
NOTICE
RE22280-XC-B/09.19, WMM6..5X/...XC... Bosch Rexroth AG
Assembly
25/40
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