Assembly 27/48
RE 29115-XE-B/09.19, 4WRZ..7X/...XE...,
Bosch Rexroth AG
NOTICE
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.
▶
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 29115-XE”
). 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.
Place the valve on the contact surface.
Only use valve mounting screws with the thread diameters, screw lengths and
strength properties listed in
“Data sheet 29115-XE”
.
Always fasten the valve with all valve mounting screws (for the number of valve
mounting screws, please refer to table 8 "Bolt dimension and tightening torque
with admissible tolerance") as otherwise, leak-tightness is not guaranteed.
7.
When using the subplates mentioned under 7.6 “Required accessories” or in case
of assembly on comparable cast iron installation surfaces, tighten all valve
mounting screws using a torque power screwdriver.
(Admissible tolerance and prescribed tightening torque see table 8 "Bolt
dimension and tightening torque with admissible tolerance"). This tightening
torque refers to the maximum admissible operating pressure.
Table 8: Bolt dimension and tightening torque with admissible tolerance
Size
Bolt dimension
Tightening torque
with admissible
tolerance
Number of valve
mounting screws
Size 10
M6 x 45 - 10.9
13.5 Nm ±10%
4
Size 16
M10 x 60 - 10.9
58.0 Nm ±20%
4
M6 x 60 - 10.9
12.2 Nm ±10%
2
Size 25
M12 x 60 - 10.9
100.0 Nm ±20%
6
Size 32
M20 x 80 - 10.9
340.0 Nm ±20%
6
