TM 5-3805-248-23-2
HYDRAULIC SYSTEM FLOW METER TEE TEST AND MAINTENANCE - CONTINUED
0321 00
SYSTEM TESTS - CONTINUED
10.
System Oil Temperature (Finish).
a.
Open manual load valve on flow meter fully.
b.
Start engine and run at 1,900 RPM. Move the ejector control lever forward.
c.
Record oil temperature. Refer to Table 1. System oil temperature should be between 145 and 155F (63 and
68C).
NOTE
Finish oil temperature (Test 10) must be within ten percent, 5F (-9C) of start oil temperature (Test 2).
For each 15F (-9C) that the finish is higher than the start, (Test 10 greater than Test 2) subtract 0.5 gal.
(2 l) from leakage rate.
For each 15F (-9C) that the finish is lower than the start (Test 2 greater than Test 10) add 0.5 gal. (2 l)
to the leakage rate.
11.
Bowl Circuit Drift Comparison.
a.
Open manual load valve on flow meter fully.
b.
Start engine and run at 1,900 RPM. Move bowl control lever into RAISE position. Lift the bowl approximately 1 ft
(0.3 m) off the ground.
c.
Move bowl control lever into HOLD position. Stop engine.
d.
Look for a downward drift (movement) in bowl.
e.
Move bowl control lever into RAISE position.
f.
Look for a downward drift (movement) in bowl.
g.
Record test results. If drift in RAISE position is more than drift in HOLD position, circle M on Test Table 1. If drift
in RAISE position is less than or the same as drift in HOLD position, circle S on Test Table 1.
Apron Circuit Drift Comparison.
12.
a.
Open manual load valve on flow meter fully.
b.
Start engine and run at 1,900 RPM. Move bowl control lever into RAISE position. Lift bowl approximately 10 in.
(38 cm) off ground.
c.
Move apron control lever into UP position and raise until apron is open approximately 15 inches.
d.
Move apron control lever into HOLD position. Stop engine.
e.
Look for a downward drift (movement) in apron.
f.
Move apron control lever into RAISE position.
g.
Look for a downward drift (movement) in apron.
h.
Record test results. If drift in RAISE position is more than drift in HOLD position, circle M on test Table 1. If drift
in RAISE position is less than or the same as drift in HOLD position, circle S on test Table 1.
0321 00-5
