8-S10
MX5100, WSM
HYDRAULIC SYSTEM
Hydraulic Flow Test (3-Points Hydraulic System)
• When using a flowmeter which is not specified by KUBOTA,
be sure to flow the instructions for that flowmeter.
• Since the flowmeter has no relief valve, do not close the
flowmeter loading valve completely before testing.
1. Install the pump adaptor 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 the 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. 14.7
MPa (150 kgf/cm
2
, 2133 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 the pressure to the
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)
• Rated pressure : 18.1 to 19.1 MPa
185 to 195 kgf/cm
2
2625 to 2770 psi
• Oil temperature : 40 to 60 °C (104 to 140 °F)
W1014546
Hydraulic pump delivery
at no pressure
Factory spec.
Above 35.8 L/min.
9.46 U.S.gals/min.
7.87 Imp.gals/min.
Hydraulic pump delivery
at rated pressure
Factory spec.
Above 32.9 L/min.
8.69 U.S.gals/min.
7.24 Imp.gals/min.
Allowable limit
29.3 L/min.
7.74 U.S.gals/min.
6.45 Imp.gals/min.
(1) Pump Adaptor
To Next Page
Loading...
