MAINTENANCE OF THE HEMTT - OD1662 - LESSON 1/TASK 2
Now he installs the reducer bushing (17)(figure 42 on page 63), the
close nipple (16), the check valve (15), and the connector (14) to the
elbow (18).
Then he installs the two connectors (10) on the tee
fitting (12). He now installs the two close nipples (13) on the elbow
(11). Finally, he installs the elbow (11) in the tee fitting (12).
He installs the elbow (5)(figure 41 on page 63), the elbow (6), close
nipple (7), and the reducer bushing (8) in the tee (9).
He installs the two elbows (3)(figure 40 on page 62) on the reservoir
(4). He then installs the two tee fittings (2) in the reservoir (4).
Now he installs the drain valve (1).
When the air reservoir has been reassembled, SGT Boyle can reinstall
it on the truck.
To reinstall the reservoir on the truck, he first
installs the two clamps (12)(figure 39 on page 61) with the four
screws (11), washers (10), lockwashers (9), and nuts (5).
He then
installs six airhoses (6).
Now the reservoir (7) is installed with
the two clamps (5), eight washers (3), four screws (4), four
lockwashers (2), and four nuts (1).
After the air reservoir has been reinstalled, SGT Boyle performs the
follow-on maintenance tasks.
These consist of closing the drain
valve, starting the engine, building up air pressure, checking the
reservoir for leaks, and shutting down the engine. SGT Boyle will pay
particular attention to the two tee assemblies he removed because of a
suspected leak; he must be absolutely certain that these are not still
leaking.
Successful completion of these steps completes this
maintenance procedure.
g.
Tanker System Troubleshooting.
In the following paragraphs, we
will follow SGT Rude as he troubleshoots an M978 tanker truck for the
malfunction DISCHARGE-LINE PRESSURE GAGE (DLPG) OR VENTURI NOZZLE
PRESSURE GAGE (VNPG) NOT WORKING and reaches the conclusion that both
the DLPG and VNPG gages are defective and need to be replaced. Prior
to beginning the actual troubleshooting procedures, he performs the
preliminary procedures contained in paragraph 2c on pages 43 and 44 of
this task. When
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