This instruction show you guide on how to perform feedback rod adjustment for Kubota L3301 L3901 excavator.
What you need?
Kubota DST-i Diagnostic Adapter
2026 Kubota DiagMaster 26.01.01
Feedback Rod Adjustment
1 Set the position control lever (1) to the lowest position.
- Start the engine, and set the engine revolution to idling.
3 Move the position control lever (1) to uppermost position.
4 While pushing feedback rod (3) forward, turn the adjusting nut
(5) counterclockwise until the relief valve starts working.
5 When relief valve starts operation, turn the adjusting nut (5) clockwise 2 turns.
6 Tighten the lock nut (4) as holding the adjusting nut (5) not to turn.
7 Set the engine revolution to maximum.
8 Move the position control lever (1) to lowest position.
9 Move the position control lever (1) to uppermost position.
10 Check the relief valve does not operate. If operates, adjust the feedback rod again.
11 Measure the lift arm free play.
12 If measurement is not within the factory specification, adjust the feedback rod length.
- When lift arm free play is large
– Lengthen the feedback rod (3)
- When lift arm free play is small
– Shorten the feedback rod (3)
