TM 5-3805-248-23-2
HYDRAULIC SYSTEM FLOW METER TEE TEST AND MAINTENANCE - CONTINUED
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COMPARISON OF PUMP TESTS - CONTINUED
(2)
Check leakage in ejector cylinder.
(a) If ejector cylinder has internal leaks or is damaged or defective; service or replace. Refer to WP 0384
(b) If ejector cylinder does not leak, proceed to step 5.
(3)
Check for leakage in bowl cylinders.
(a) If bowl cylinders are damaged or defective service or replace. Refer to WP 0383 00.
(b) If bowl cylinders leak, proceed to step 5.
(4)
Check leakage in apron cylinder.
(a) If apron cylinder is damaged or defective; service or replace. Refer to WP 0385 00.
(b) If apron cylinder leaks, proceed to step 5.
(5)
Check hydraulic implement pump for source of leakage. Do Blocked Cylinders Tests (Table 3) for leakage
rate.
(a) If hydraulic implement pump is worn, damaged or defective; service or replace. Refer to WP 0380 00.
b.
Flow loss for Test 14 is 10 percent or more; flow differential for Test 14 is higher than flow differential for Test 16
by 2 gpm (8 l/min) or more.
Check hydraulic implement pump for aeration and cavitation.
HYDRAULIC IMPLEMENT PUMP TEST-AERATION AND CAVITATION FOR TESTS 17 THROUGH 23
Test 17.
1.
a.
Open manual load valve on flow meter fully.
b.
Start engine and run at 700 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 22 gpm (83 l/min).
Test 18.
2.
a.
Open manual load valve on flow meter fully.
b.
Start engine and run at 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).
Test 19.
3.
a.
Open manual load valve on flow meter fully.
b.
Start engine and run at 1,100 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 39 gpm (177 l/min).
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