Air Tank Maintenance; Wet Air Tank; Primary Air Tank - PREVOST H3-41 Maintenance Manual

In addition, an expansion air tank is installed in
series with each air spring.
FIGURE 43: LOCATION OF AIR TANKS
12.1

AIR TANK MAINTENANCE

Ensure that the accessory air tank is purged
during pre-starting inspection. A good practice is
to purge this tank at the end of every driving day
by the remote air tank drain valve located in the
service compartment (Figure 46).
Moreover, purge all tanks by their bottom drain
valves at specified intervals.

12.1.1 Wet Air Tank

This tank is installed in front of and above drive
axle in the rear wheel housing and is provided
with a bottom drain valve.
MAINTENANCE
It is recommended to purge the wet air tank by
its bottom drain valve every 12,500 miles
(20 000 km), or once a year, whichever comes
first.
A remote valve located in engine compartment
and accessible through engine R.H. side door is
used to purge daily (Figure 44).

12.1.2 Primary Air Tank

The primary air tank is located above tag axle.
This tank is also provided with a bottom drain
valve.
It is recommended to purge the primary air
tank by its bottom drain valve every 12,500
miles (20 000 km), or once a year, whichever
comes first.
FIGURE 44: REAR VALVE LOCATION ON H3 SERIES
PA1621 Maintenance Manual All Series | Section revised October 2018
SECTION 16 : SUSPENSION
MAINTENANCE
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