Kubota WSM L3560, Workshop Manual

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HYDRAULIC SYSTEM
L3560, L4060, L4760, L5060, L5460, L6060, WSM
8-S7
Hydraulic Flow Test (for Power Steering)
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. Loosen the delivery pipe and install the adaptor
52
to the pump
discharge port.
2. Connect the hydraulic test hose to the adaptor
52
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. 9.8
MPa (100 kgf/cm
2
, 1422 psi). Hold in this condition until oil
temperature reaches approx. 40 °C (104 °F).
7. Open the loading valve completely.
8. Refer to
"Condition"
below to set the engine speed.
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.
Condition
• Engine Speed
Approx. 2700 min
-1
(rpm) (Manual Transmission and GST)
Approx. 2600 min
-1
(rpm) (HST)
• Rated pressure
L3560
10.7 to 11.7 MPa (110 to 119 kgf/cm
2
,1560 to 1690 psi)
L4060, L4760, L5060, L5460, L6060
12.7 to 13.7 MPa (130 to 139 kgf/cm
2
, 1850 to 1980 psi)
• Oil Temperature
40 to 60 °C (104 to 140 °F)
(To be continued)
KiSC issued 03, 2016 A