TM 5-3805-248-23-2
HYDRAULIC SYSTEM FLOW METER TEE TEST AND MAINTENANCE - CONTINUED
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HYDRAULIC IMPLEMENT PUMP TESTS- CONTINUED
WARNING
Manual load valve on flow meter must be fully open before starting engine. Failure to follow this warning
could result in INJURY.
1.
Hydraulic Implement Pump Flow At Low Pressure.
a.
Open manual load valve on flow meter fully.
b.
Start engine and run at 1,900 RPM.
c.
Slowly adjust manual load valve on flow meter for a pressure of 100 psi (689 kPa).
d.
Record oil temperature and flow rate. Refer to Chart II. Correct oil temperature is between 145 and 155F (63
and 68C). Correct flow rate is 79 gpm (300 l/min).
2.
Pump Flow At High Pressure.
a.
Open manual load valve on flow meter fully.
b.
Start engine and run at 1,900 RPM.
c.
Slowly adjust manual load valve on flow meter for a pressure of 1,000 psi (6,895 kPa).
d.
Record oil temperature and flow rate. Refer to Table 2. Correct oil temperature is between 145 and 155F (63
and 68C). Correct flow rate is 71 gpm (269 l/min).
3.
Pump Flow At Low Pressure (1/2 Test RPM).
a.
Open manual load valve on flow meter fully.
b.
Start engine and run at 950 RPM.
c.
Slowly adjust manual load valve on flow meter for a pressure of 100 psi (689 kPa).
d.
Record oil temperature and flow rate. Refer to Table 2. Correct oil temperature is between 145 and 155F (63
and 68C). Correct flow rate is 40 gpm (151 l/min).
4.
Pump Flow At High Pressure (1/2 Test RPM).
a.
Open manual load valve on flow meter fully.
b.
Start engine and run at 950 RPM.
c.
Slowly adjust manual load valve on flow meter for a pressure of 1,000 psi (6,895 kPa).
d.
Record oil temperature and flow rate. Refer to Table 2. Correct oil temperature is between 145 and 155F (63
and 68C). Correct flow rate is 32 gpm (121 l/min).
COMPARISON OF PUMP TESTS
a.
Flow loss for Test 14 is 10 percent or more; flow loss for Tests 4 through 9 is more than percent shown in Table 1,
(1)
Check leakage in hydraulic control valve.
(a) If hydraulic control valve has internal leakage or is damaged or defective; adjust, service or replace.
Refer to WP 0323 00 and WP 0381 00.
(b) If hydraulic control valve leak does not leak, proceed to step 5.
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