Dynapac CA 251, Maintenance Manual

Page: 16 / 32

14 CA 251 M251-1EN1
Use compressed air at a maximum pressure of 0.7
MPa (7 kp/cm
2 ).
Blow up and down the paper pleats on the inside of the
filter element. Hold the nozzle at least 10 mm (0.39 in)
from the paper pleats so as to avoid tearing the paper.
Change the main filter at the latest after 5
cleanings.
Wear protective goggles when working
with compressed air.
When the tyres are filled with liquid the air pressure
valve (1) must be set at “12 o’clock” when pumping.
Check the tyre pressure with a pressure gauge.
Min. tyre pressure =
110 kPa (1.1 kp/ cm
2
).
Max. tyre pressure = 150 kPa (1.5 kp/cm
2
)
Tyre pressure CA 251A: 110 kPa (1.1 kp/cm
2
)
Check both tyres.
When changing the tyres it is important that
both tyres have the same rolling radius (max.
difference about 15 mm (0.59 in)). The no-spin
equipment may otherwise be damaged.
Check tightening torque of the wheel nuts (2) at 550
Nm (406 lbf.ft). Check both wheels and all nuts (applies
only for a new machine or newly fitted wheel).
Replace or clean the main filter of the air
cleaner when the warning lamp on the instru-
ment panel lights at full engine revs.
Loosen the clamp (4) and take out the dust trap (3).
Loosen the wing nut at the centre of the filter and take
out the inner cover (5). Clean the dust trap with a clean
rag.
Loosen the wing nut and pull out the main filter (6).
Wipe the inside of the filter housing (1) and the input
tube with a clean rag.
Ensure that connections and hoses between the filter
housing and engine are intact and tight.
Clean the emptying slit (7) of the dust trap.
Replace the secondary filter (2) with a new
one after every third replacement or third
cleaning of the main filter. The secondary filter
cannot be cleaned.
Air cleaner – Cleaning
the main filter element
EVERY 50 HOURS OF OPERATION (WEEKLY)
6 5 4 3
2
1
7
Fig. 17 Air cleaner
1. Filter housing
2. Secondary filter
3. Dust trap
4. Clamp
5. Inner cover
6. Primary filter
7. Emptying slit
Tyres – Tyre pressure
Wheel nuts – Tightening
Fig. 19 Wheels
1. Air valve
2. Wheel nuts
1
Fig. 18 Main filter
Cleaning with
compressed air
2