Maintenance and repair 39/48
RE 29115-XE-B/09.19, 4WRZ..7X/...XE...,
Bosch Rexroth AG
10.3 Maintenance schedule
Valves require low maintenance if used as intended.
For a long and reliable operation of the valve, Bosch Rexroth recommends regularly
checking the hydraulic system and the valve.
10.3.1 Checking for leakage
Check the valve for leakage. An early detection of hydraulic fluid loss may help you
to identify and remedy errors. Bosch Rexroth therefore recommends that you keep
the valve and/or the system permanently clean.
10.3.2 Checking for noise development
Check the valve for noise development. Based on noise development or the
increase of noise development, a possible failure of one or several components can
be recognized in time and consequential damage can be avoided.
10.3.3 Checking the mounting elements
Check that the mounting elements are attached firmly. All mounting elements are
to be checked with the system being switched off, depressurized and cooled down.
10.4 Repair
WARNING
Explosion hazard caused by improper repair!
Improper repair will void the explosion protection!
▶
For repair works, the valve may only be disassembled to the extent described
in these operating instructions.
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Defective parts may only be replaced by new, interchangeable components
in original equipment quality.
10.5 Rectifying external leakages
External leakage at the valve connection surface can be rectified on site.
Other leakages have to be rectified by specialists of the manufacturer.
10.5.1 Rectifying leakage at the valve connection surface
1.
Remove the valve, see chapter 11 “Disassembly and removal”.
2.
Inspect the contact surfaces for seal rings at the valve for cleanliness and
damage.
3.
Inspect the seal rings and recesses on the connection flanges for cleanliness
and damage.
4.
Dry the mounting surface and the contact surface using suitable cleaning
materials.
5.
Assemble the new seals.
6.
Re-assemble the valve at the contact surface, see chapter 7 "Assembly".
