Malfunction Table - Bosch rexroth M1-16 Series Instruction Manual

Table 8: Malfunction table
Malfunction
Hydraulic fluid is escaping
on the control block or
the valve section
Hydraulic fluid leaks from
the supply lines on the
control block.
Hydraulic fluid is leaking
between the valve
sections
Troubleshooting | Control blocks for mobile applications
14�2 Malfunction table
Within the permissible operating conditions, no malfunctions occur at the control
block.
Possible cause
The control block is leaking
The threaded plugs are leaking
Control block housing or valve section is
leaking
The ports leading to the actuator (the screw
neck, the fittings) are leaking.
The valve housing on the secondary valve/
threaded plug is leaking
The seals of assembled parts are leaking
The system pressure is too high
Pipe or hose lines damaged
Pipelines or hose lines are loose
The seals are leaking
The port thread is damaged
The seals on the flange surface are
damaged
Deposition of dirt during the installation of
the control block
The control block housing on the flange
surface is leaking
Tightening torque of tie rod is too low
Residual oil from installation/testing of the
control block
Remedy
Tighten the mounting bolts to the specified tightening
torque.
Tighten the threaded plugs to the specified tightening
torque; possibly renew the copper seal rings.
With O-ring seals:
Do not tighten the threaded plug, renew the seals and
tighten the threaded plug to the specified torque.
If leaks remain:
Check the sealing surfaces/seals for damage.
If necessary, renew the threaded plug.
Remove the control block or the valve section and
replace with a new one.
Check seals, replace fittings if necessary. Check
tightening torques, see the parameters provided by the
manufacturer of the fitting.
If necessary, renew the secondary valve/threaded plug.
Renew the seals; refer to the spare parts list.
Comply with the pressure limit
Replace pipe or hose lines
Tighten the threaded joints and the fittings in
accordance with the installation instructions that
apply to the fittings. You can obtain the corresponding
installation instructions from the machine manufacturer.
Renew the seals; refer to the spare parts list.
Remove the control block or the valve section and
replace with a new one.
Renew the seals; refer to the spare parts list.
Remove the control block, clean the flange surface.
Renew the damage valve section.
Check the tightening torques, refer to the spare parts
list.
Remove the oil and contaminants from the control
block; when doing this, do not use any cleaning agents
that can adversely affect plastics or whose properties
can change, can adversely affect metals or react with
them or leave residues.
RE 64025-B/2021-08-12, Bosch Rexroth AG
47/54