wsm L3301 Workshop Manual page 559

L3301, L3901, L4701, WSM
Hydraulic Flow Test
IMPORTANT
• When using a flowmeter other than KUBOTA specified
flowmeter, 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.
1. Remove the delivery pipe and install the pump adaptor (see
page G-93) with O-ring to the pump discharge port.
2. Connect the hydraulic test hose to the adaptor 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
counterclockwise.)
5. Start the engine and set the engine speed at 2000 to 2200 min
(rpm).
6. Slowly close the loading valve to generate pressure approx.
14.7 MPa (150 kgf/cm
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.
Delivery pipe (3-point hitch)
Tightening torque
mounting bolt
Condition
• Engine speed:
[L3301/L3901]
-1
approx. 2700 min (rpm)
[L4701]
-1
approx. 2600 min (rpm)
• Rated speed:
[L3301/L3901]
15.7 to 16.1 MPa (160 to 165 kgf/cm
[L4701]
17.1 to 18.1 MPa (175 to 185 kgf/cm
• Oil temperature:
40 to 60 °C (104 to 140 °F)
8-S9
HYDRAULIC SYSTEM
loading valve completely.
2
, 2130 psi). Hold in this condition until oil
17.6 to 20.6 N·m
1.8 to 2.1 kgf·m
13 to 15 lbf·ft
2
, 2280 to 2340 psi)
2
, 2489 to 2631 psi)
(To be continued)
KiSC issued 09, 2016 A
(Turn
-1