TM 5-3805-248-23-2
HYDRAULIC SYSTEM FLOW METER TEE TEST AND MAINTENANCE - CONTINUED
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COMPARISON OF SYSTEM TESTS - CONTINUED
e.
Flow loss for Tests 8 and 9 are more than percent shown in Table 1; flow loss for Tests 4, 5, 6 and 9 are less than
percent shown in Table 1.
(1)
Check piston seals in apron cylinder for leakage.
(a) If seals are damaged or defective, replace. Refer to WP 0385 00.
(b) If no leakage is present, go to step 2.
(2)
Check hydraulic control valve spools and body for damage or wear.
(a) If hydraulic control valve spools and body are damaged or defective; adjust, service or replace.
(b) If hydraulic control valve spools and body are functioning, go to step 3.
(3)
Check sequence valve for apron circuit.
(a) If sequence valve leaks or is damaged or defective; service or replace. Refer to WP 0382 00.
(b) If apron cylinder and sequence valve are functioning, proceed to Blocked Circuits Test 30 and 31.
(c) If leakage is still too high, the problem is in the apron control valve. Refer to WP 0323 00 and WP
f.
Flow loss for Tests 5 and 9 is more than the percent shown in Chart I; flow loss for Tests 4, 6, 7 and 8 is less than
percent shown in Table 1.
(a) Check hydraulic control valve body and spools for ejector and apron circuits.
(b) If hydraulic control valve or spools are damaged or defective; adjust, service or replace. Refer to WP
HYDRAULIC IMPLEMENT PUMP TESTS
Test is used to find the efficiency of the hydraulic
HYDRAULIC IMPLEMENT
PRESSURE
implement pump. Remove pressure line of hydraulic imple-
LINE
PUMP
ment pump. Install a blocking plate. This will prevent oil
from going through the system. All of hydraulic implement
pump flow now will go through flow meter.
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