FLOW METER TEE TEST PROCEDURE IX
TM 5-3805-263-14&P-3
3. Turn manual control valve slowly toward
PROBABLE REASON:
CLOSED position (control lever in RAISE
position).
A. Bad pump.
4. Make a record of the maximum oil pressure
B. Leakage in the steering circuit.
seen on the gauge. The pressure must be like
C. Wear or damage in the body and/or valves in the
the specification for the test.
combination valve.
5. Move the blade control lever to LOWER position
D. Leakage in the control valves for the
and then to HOLD position to lower the oil
implements.
pressure in the rod end of the cylinder.
RECOMMENDATION FOR ACTION:
Test 23: Pump Shift Pressure (For Change in Piston
Stroke)
A. Do Pump Test.
B. Do Test 41. If there is still too much leakage the
1. Run engine at test rpm.
problem is in either the combination valve or the
2. Look at the flow gauge and pressure gauge and
control valve for the implements.
slowly turn the manual control valve toward the
CLOSED position.
PROBLEM:
Percent of flow loss for Test 4 and/or
3. Make a record of the pressure when the
Test 5 is more than the specification
indicator in the flow gauge moves (less gpm).
percent in the tests.
The pressure must be like the specification for
the test.
PROBABLE REASON:
"Is It Necessary To Make More Tests?"
A. Leakage in seals on piston in the blade cylinder
"If So, Which Circuit(s)?"
on the right side.
B. Leakage in the lock check valve for the blade
Make a comparison of the test data with the data
cylinder.
on Charts A for the specific machine under test. The
percent of flow loss on the charts is the maximum for
RECOMMENDATION FOR ACTION:
best performance.
Do Blocked Cylinder Tests 38 and 39 for circuit to the
Components that are worn, or not working
blade cylinder on the right side. If there is still too much
correctly, are found by their flow difference and percent
leakage the problem is in the lock check valve.
of flow loss or lower system efficiency. System values
for new and rebuilt machines must not be more than the
PROBLEM:
Percent of flow loss for Test 6 and/or
percent of flow loss in the system tests shown on the
Test 7 is more than the specification
charts for the specific machine. The permissible flow
percent in the tests, but for Tests 4, 5
difference is a function of machine application.
and 8 through 19 the percent of flow
loss is not too much.
If the flow loss is acceptable, the Tee Test is
completed.
PROBABLE REASON:
If the flow loss is not acceptable, in one or more
A. Leakage in seals on piston in the blade cylinder
circuits, the tests for the pump and/or the blocked
on the left side.
components must be done.
B. Leakage in lock check valve for the blade
cylinder.
Troubleshooting
RECOMMENDATION FOR ACTION:
The following examples are a list of problems
and probable reasons. They will aid in finding the
Do Blocked Cylinder Tests 40 and 41 for circuit to the
location of the components that are worn, or not working
blade cylinder on the left side. If there is SAL still too
correctly.
much leakage the problem is in the lock check valve.
PROBLEM:
Percent of flow loss for Tests 4
through 19 is more than the specification percent for
the tests.
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