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To adjust the travel pressure on a 320b you removes the travel motor covers and you will andjust the crossover reliefs as following instructs
Slowly move the left travel control lever to full FORWARD position and check the pressure gauge reading at pressure tap (3). The pressure setting of crossover relief valve (20) should be 36800 ± 1470 kPa (5350 ± 215 psi). This is the pressure spec for all travel crossover reliefs. You will need to bump up the main relief to over 5350 then set it back to normal once done.Main is set to 4.950 psi