Kubota L3301 L3901 Tractor Hydraulic Flow Test Guide

This instruction show you guide on how to perform hydraulic flow test for Kubota L3301 L3901 tractor.

IMPORTANT

When using a flowmeter other than KUBOTA specifiedflowmeter, be sure to use the instructions with that flowmeter.
Do not close the flowmeter loading valve completely,before testing, because it has no relief valve.

Related Contetns:

2025 Kubota Takeuchi Diagmaster v22.08.01 v4.1.2 Software Free Download
Kubota DST-i Diagnostic Adapter

Kubota EPC Spare Parts Catalogue 2021.06 Download

Procedures:

1 Remove the power steering delivery pipe or delivery hose joint

bolt and install the pump adaptor 2 to the pump discharge port.

2 Connect the hydraulic test hose to the pump adaptor 2 and flowmeter inlet port.

3 Connect the other hydraulic test hose to the flowmeter outlet port and to transmission fluid filling plug hole.

4 Open the flowmeter loading valve completely. (Turn counterclockwise.)

5 Start the engine and set the engine speed at 2000 to 2200 min-1 (rpm).

6 Slowly close the loading valve to generate pressure approx. 9.81 MPa (100 kgf/cm2 , 1420 psi). Hold in this condition until oil temperature reached approx. 40 °C (104 °F).

7 Open the loading valve completely.

8 Set the engine speed. (Refer to Condition.)

9 Read and note the pump delivery at no pressure.

10 Slowly close the loading valve to increase pressure (Rated pressure). As the load is increased, engine speed drops,therefore, reset the engine speed.

11 Read and note the pump delivery at rated pressure.

12 Open the loading valve completely and stop the engine.

13 If the pump delivery does not reach the allowable limit, check the pump suction line, oil filter or hydraulic pump. (When reassembling)