Kubota L3301 L3901 Excavator Safety Valve Setting Pressure Test

Kubota L3301 L3901 Excavator Safety Valve Setting Pressure Test Using Injection Nozzle Tester

1 Remove the safety valve assembly (1).

2 Attach the safety valve to an injection nozzle tester with a safety valve setting adaptor. (Refer to “SPECIAL TOOLS” (see page G-94.).)

3 Measure the operating pressure of the safety valve.

4.If the operating pressure is not within the factory specifications, adjust by turning the adjusting screw (2).

5.After adjustment, tighten the lock nut (3) firmly.

(When reassembling)

• Install the safety valve to the rear hydraulic block, being careful not to damage the O-ring and apply transmission fluid.

 

 

NOTE

Use specified transmission fluid (Refer to “4 . LUBRICANTS, FUEL AND COOLANT”on page G-10.)to test the operating pressure of the cylinder safety valve.

(1) Safety Valve Assembly (2) Adjusting Screw

(3) Lock Nut (4) Spring

(5) Seat (6) Ball (7) Housing