• Check the rubber coupling for tears.
GUID-E7E9A2B6-8596-4838-8550-CA4F323760D6
1. Rubber coupling
• Change the rubber coupling when needed.
It is recommended to let an authorised Valtra workshop change the coupling.
4.7.4.19 Checking and greasing the trailer air-pressure brake system
Check and grease the trailer air-pressure brake system periodically.
1. Grease the rubber surfaces of the trailer quick couplings with Calsium LF
grease.
2. Check the integrity of the system.
The system has to be air tight so that after stopping the engine, the pressure
does not decrease more than 0.15 bar during 10 minutes (2%). When
needed, repair the leaks.
4.7.4.20 Checking the air pressure system's automatic water draining
If the tractor is equipped with an air pressure system (extra equipment), there is a
pressure air reservoir under the cab. If the tractor is equipped with pneumatic
brakes (extra equipment), there are 2 pressure air reservoirs under the cab. The
reservoirs have automatic valves for water draining. The valve functions must be
checked frequently.
4. Maintenance
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