Checking Hydraulic System Tightness - PRONAR T669 Operator's Manual

SECTION 5
• inspecting and checking air tightness of system.
• Checking technical condition of hydraulic connections.
DANGER
Do NOT tip trailer with unreliable hydraulic tipping system.
Do not use the trailer if the support hydraulic system is out of order.
Do NOT use the trailer if hydraulic brake system is unreliable.
Do NOT use the trailer if hydraulic tailgate system is unreliable.

5.4.2 CHECKING HYDRAULIC SYSTEM TIGHTNESS

Required service actions
Hitch trailer to tractor.
Connect all hydraulic system conduits according to service instructions.
Clean connections and cylinders (tipping cylinder, hydraulic tailgate cylinders
and possibly hydraulic brake cylinders and turning interlock cylinders).
Conduct test tipping of load box backwards.
Open and close the tailgate several times.
Press tractor brake pedal several times.
Check tightness of hydraulic system, inspect cylinders and hydraulic conduits.
In the event of confirmation of oil on hydraulic ram cylinder bodies ascertain origin of leak.
Inspect hydraulic seals when ram cylinder is completely extended. Minimum leaks are
permissible with symptoms of "sweating", however in the event of noticing leaks in the form
of "droplets" stop using the trailer until faults are remedied. If unreliability is evident in brake
cylinders do NOT use trailer with damaged system until faults are remedied.
Checking tightness:
Only if the trailer is equipped with hydraulic brake system.
• After a week of use
• every 12 months of use.
5.23
Pronar T669