PRONAR T743, Operator'S Manual

Page: 111 / 150

Pronar T743 SECTION 5
5.12
required pressure. To inspect tightness release brake pedal and press brake pedal of tractor
(the help of the second person is required).
If conduits, seals or other system elements are damaged, compressed air will escape in
these damaged places with a characteristic hiss. Lack of system tightness may be exposed
by covering checked elements with washing fluid or other foaming preparations, which will
not react aggressively with system elements. Damaged seals or conduits, causing leaks
should be replaced. If the cause of the system leak is the outflow from a piston, control valve
body or braking force regulator should be taken to authorised repair provider for repair or
replacement of parts.
Checking tightness:
•
After a week of use
•
every 12 months of use.
Contact of pneumatic leads with oils, greases, petrol etc. may cause damage and accelerate
ageing process. Bent conduits, permanently deformed, cut or worn should be replaced.
5.2.8 OPERATION NO. 8- CLEANING THE AIR FILTERS
Depending on trailer working conditions, but not less than once in three months, take out and
clean air filter inserts, which are located in pneumatic system connection conduits. Inserts are
used many times and are not subject to changing unless they are mechanically damaged. In
order to clean insert first reduce pressure in supply conduit. Next remove securing slide (1) –
figure (5.4). Hold the filter cover (2) with the other hand. After removing slide lock, the cover
is pushed off by the spring, in the filter housing. The insert and the filter body should be
carefully washed out and blown through with compressed air. Assembly should be done in
reverse order.
DANGER
Before proceeding to dismantle filter, reduce pressure in supply conduit. While
disengaging filter slide gate, hold cover with other hand. Stand away from filter cover
vertical direction.