Table of Contents
Advertisement
6 - Maintenance
Venting the hydraulic damping system (SELF TRACK only)
The following venting procedure requires a special venting kit, HARDI ref. no. 730725.
1. Place the trailer on the support leg so that the yoke goes free from the tractor and the rams can work freely.
2. Relieve the pressure in the expansion tank and remove the hydraulic hose.
3. Fit the two test hoses in the pressure gauge outlets on the rams (at the rear of the track system).
4. Move the track system from one side to the other approx. 10 times (full swing).
5. Loosen the plug very carefully in order to leak the air out of the system.
6. Fit the hydraulic hose on the expansion tank.
7. Remove the level plug and using the tractor hydraulics, cautiously fill oil in the expansion tank until it reaches the level
plug.
8. Fit the level plug and fill the expansion tank to an air pressure of 5 bar.
9. Fit the 0-400 bar pressure gauge on the pressure gauge outlet at the ram. Adjust the excess-pressure valve to approx.
40 bar.
On flat ground it is possible to work with a lower opening pressure. This gives a more sensible reaction but it also results
in the fact that the trailer can swing when driving on hilly ground and when swinging at high speed.
WARNING! Plug the hose. If this is neglected, the pressure gauge may be damaged.
TRACKER damping pressure setting (SELF TRACK only)
The hydraulic pressure relief valves in the TRACKER's damping
system is factory set to open at 40 bar (580 p.s.i.) which is adequate
for most conditions. If the damping seems too "soft" or too "hard",
the settings can be adjusted.
Connect manometers to the Minimesh couplings and control if
pressure is equal for both sides.
(A)= Adjusting screw
(B)= Self-locking nut
ATTENTION! Too low pressure will result in a swaying trailer.
Too high pressure will influence on the ability to turn with the
tractor.
6.20
Advertisement
Table of Contents
