Hägglunds Compact CA, Руководство по установке и обслуживанию

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Installation and Maintenance Manual, Compact CA
D3
F1
4.4.2 Motor
If the motor is to be stored stationary for a
longer period than about 1 month, it must be
protected from internal rust. This can be done
as follows:
1. Mix anti-rust additive with the hydraulic fluid
of the system. Use 5% of Rust Veto Con-
centrate (manufactured by E F Houghton &
Co, Philadelphia, USA). This additive gives
rust protection for up to about 1 year, after
which time the motor must be turned a few
revolutions.
2. If no additives are used, the motor must be
regularly turned a few revolutions.
3. If it is not possible to turn the motor, plug
all connections, open drain outlet D1 or D2
on the port end housing (or if the motor is
mounted vertically, flushing connection F1
on the shaft end housing) and fill the motor
with hydraulic fluid. (See figure 4.1 and 4.1a).
Figure 4.1
Figure 4.1a
D2
D1
Filters must be changed after the first 100
working hours and the second change is to
be carried out after 3 months or 500 working
hours whichever is earlier. They must then be
changed at regular intervals of 6 months or
4000 working hours.
4.4.4 Oil
(Se also 2.3)
Analysis
It is recommended that the oil should be
analysed every 6 months. The analysis should
cover viscosity, oxidation, water content, addi-
tives and contamination.
Most oil suppliers are equipped to analyse the
state of the oil and to recommend appropriate
action. The oil must be replaced immediately if
the analysis shows that it is exhausted.
Viscosity
Many hydraulic oils become thinner with in-
creasing use, and this means poorer lubrica-
tion. The viscosity of the oil in service must
never fall below the minimum recommended
viscosity.
Oxidation
Hydraulic oil oxidizes with time of use and
temperature. This is indicated by changes in
colour and smell, increased acidity or the for-
mation of sludge in the tank. The rate of oxida-
tion increases rapidly at surface temperatures
above 60 °C (140 °F), and the oil should then
be checked more often.
The oxidation process increases the acidity of
the fluid; the acidity is stated in terms of the
"neutralisation number". Typical oxidation is
slow initially and increases rapidly later.
A sharp increase (by a factor of 2 and 3) in the
neutralisation number between inspections is
a signal that the oil has oxidized too much and
should be replaced immediately.
4.4.3 Filters
Maintenance