Dokument-No.:2013366
Version a
page
10
Creation date: 28.11.2007
4.1.2. Hydraulic Drive Unit and hydraulic components
(1) Press the selector switch “Flush” (Option) located in the control cabinet for at least 60 sec.
(2) Check for damage to the hydraulic lines.
(3) Check the hydraulic cylinder (hydraulic cylinders) (5) and all hydraulic screw connections for
oil leaks (tighten if necessary).
(4) Check the oil level in the oil tank and if necessary refill.
(5) Check the general condition of all functional parts.
(6) Check the system pressure and adjust to specified pressure if necessary.
(7) Clean the hydraulic unit and check the surrounding area for contamination and/or foreign parts
of any kind.
4.1.3. Electrical Control
(1) Visual examination of the terminal box inside the piston housing(4) and the terminal box inside
of the control cabinet.
(2) Functional test of the electrical heater of control cabinet.
Conduct a general functions test.
4.2.
Semi-Annual Maintenance or in each case of 50.000 cycles
This maintenance needs to be performed half-yearly or in each case of 50.000 cycles (1Zyklus
corresponds once to lifting and lowering). The following work needs to be performed in addition to
the work which is required for the monthly maintenance:
4.2.1. Blocking element and Underground Housing
(1) Lubricate the joint head of the hydraulic cylinders (5).
(2) Lubricate the chain joints.
(3) Check that all functional parts are intact, if necessary replace.
(4) Remove the sand from the underground housing as well as the mechanical functional parts
with an industrial vacuum cleaner; clean-up any contamination and oil deposits.
4.2.2. Hydraulic Drive Unit and hydraulic components
(1) Remove oil filler neck and check for contamination, clean if necessary.
(2) Check the air and reverse-flow filters, clean or replace if necessary.
(3) Clean the sand and other contaminates out of the control box, all hydraulic components and
the motor, especially oil residues.
4.2.3. Electrical Control
Attention!
Examination of the electrical connections and system can only be made by an Electrician.
(1) Check the condition of the electrical control.
(2) Check that the contactors and relays function faultlessly.
Conduct a function test
Check the raising and lowering of the blocking element with a light test run. Pay attention if the
electrical operation makes any unusual noises and, if possible, determine the cause.
