Fayat Bomag BW 900-50 Service Manual page 26

Before commissioning
Taking into operation
After taking into operation
1.3.1.1.3 Repair notes for gaskets and mating surfaces
General information – Maintenance and repair
n Fill the housings of hydraulic pumps and motors with hydraulic
oil. Use only hydraulic oils according to the specification in the
maintenance instructions.
After changing a component flush the hydraulic system as
n
described in the flushing instructions.
n Bleed the hydraulic circuits.
n Start up the hydraulic system without load.
n Check the hydraulic oil level in the tank, if necessary top up
with hydraulic oil as specified in the operating and maintenance
instructions or drain oil off into a suitable container.
n Check fittings and flanges for leaks.
n After each repair check all adjustment data, system pressures,
rotational speeds and nominal values in the hydraulic system,
adjust if necessary.
n Do not adjust pressure relief valves and control valves to
values above their specified values.
Leaking sealing faces can mostly be traced back to incorrect
assembly of seals and gaskets.
Before assembling a new seal or gasket make sure that the
n
sealing surface is free of pitting, flutes, corrosion or other
damage.
n Inappropriately stored or handled seals (e.g. hanging from
hooks or nails) must under no circumstances be used.
n Install seals and gaskets only with sealing compound, grease
or oil, if this is specifically specified in the repair instructions.
n If necessary remove any old sealing compound before assem-
bling. For this purpose do not use any tools that could damage
the sealing surfaces.
n Sealing compound must be applied thin and evenly on the cor-
responding surfaces; take care that the compound does not
enter into oil galleries or blind threaded bores.
n Examine the contact faces for scratches and burrs, remove
these with a fine file or an oilstone; take care that no grinding
dust and dirt enters into tapped bores or enclosed components.
n Blow out lines, ducts and gaps with compressed air, replace
any O-rings and seals that have been dislodged by the com-
pressed air.
BW 900-50 27