HALE AP, Technical Manual

Page: 49 / 177

37
B. If oil is NOT visible in sight glass, or if oil is below midpoint of sight glass, add
oil as follows.
Remove fill/vent cap (Figure 11). 1.
ALWAYS USE PROPER PPE. OIL MAY BE TOXIC TO PEOPLE AND/OR THE ENVIRON-
MENT. CATCH AND DISPOSE OF OIL PROPERLY. IMPROPER OIL HANDLING MAY RE-
SULT IN HEALTH RISKS AND/OR CRIMINAL PUNISHMENTS.
DO NOT OVER FILL THE GEARBOX. EXCEEDING THE OIL LEVEL MAY RESULT IN OVER
HEATING.
Add oil (see paragraph 5.7.2), until oil is at midpoint of sight glass 2.
(See Figure 11).
NOTE
A funnel may make adding oil easier and safer.
Install fill/vent cap. 3.
C. If oil completely covers sight glass, drain excess oil as follows.
Position appropriate catch pan. 1.
Remove magnetic drain plug from gearbox. (See Figure 11) 2.
Restrict oil flow to slowly drain oil from gearbox. 3.
Simultaneously examine magnetic drain plug for the following. 4.
a) Metal fragments, if metal fragments are present on drain plug continue, otherwise
go to Step 5.
b) Remove cover plate and cooler.
c) Visually inspect for large quantities of fragments present in gearbox.
d) If large quantities of fragments are present in gearbox, remove all fragments from
gearbox and on internal components.
e) Repair or replace internal components as necessary.
f) Replace cooler and cover.
g) Remove oil fill plug, and install magnetic drain plug.
h) Fill gearbox with approved gear oil until oil level is centered in the sight glass.
i) Replace fill plug.
j) Procedure is complete; do NOT perform Step 5 or Step 6.
Slowly drain oil until oil level is centered in sight glass. 5.
Replace magnetic drain plug. 6.
4.4.3.2 Perform Vacuum Test
Verify pump maintains a vacuum as follows.
A. Close all valves.
B. Ensure all caps are in place and tightened.