DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM
Hydraulic pump - Flow test (A.10.A.20 - F.40.A.45)
435, 445, 445CT
WARNING
CSM118 - Two persons are required to perform the flowmeter tests for safety to avoid possible injury. One
person must be seated in the operators seat with the Seat Bar down when the engine is running. The
second person is to control the flowmeter and take the readings.
1. Park the machine on a level surface. Lower the
loader bucket to the floor. Stop the engine.
2. Disconnect the hose from the pump pressure port
at Test Point 1 . Install a plug in the hose. Connect
the flowmeter
inlet hose to th e fitting at the pressure
port of the pump.
3. Pu t the flowmeter outlet hose into the hydraulic
reservoir. Usewiretofastentheflowmeter outlet
hose below the surface of the hydraulic oil.
4. Make sure that the oil level in the hydraulic reservoir
is correct.
5. Make sure that the pressure valve of the flowmeter
is opened completely.
6. The oil must be at operating temperature. If the
oil is not at operating temperature, run the engine
at full throttle and close the pressure valve of the
flowmeter until the pressure gauge indicates 103 bar
(1500 psi). Continue to run the engine at full throttle
until the temperature of the oil is 52°C (125°F). Then
open the pressure valve completely.
7. Make sure that the pressure valve is opened
compl
etely. Adjust the engine speed to 2300 r/min
(rpm) and read the flow gauge. Read the flow and
record the reading as test number 1 .
8. Slowly close the pressure valve on the flowme ter
until the pressure gauge indicates 97 bar (1400 psi).
Keep the engine running at 2300 r/min (rpm). Read
the flow and record the reading as test number 2 .
9. Slowly close the pressure valve on the flowme ter
until the pressure gauge indicates 124 bar (1800
psi). Keep the engine running at 2300 r/min (rpm).
Read the flow and record the reading as test
number 3.
10. Slowly close the pressure valve o n the flowmeter
until the pressure gauge indicates 152 bar (2000
psi). Keep the engine running at 2300 r/min (rpm).
Read the flow and record the reading as test
number 4.
11. Open the pressure valve completely. Decrease the
engine speed to low idle and stop the engine.
NOTE: Understanding the results of the tests are outlined
in the steps below.
1 04/05/2005
A.10.A / 30
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