WATER MANIFOLD ASSEMBLY.

TM 3-1040-279-12&P

4-46 WATER MANIFOLD ASSEMBLY.

This task covers installation and use of Water Manifold Assembly.

INITIAL SETUP

General Safety Instructions

Tools

Ensure a fully charged fire extinguisher is on

General Mechanic's Automotive Tool Kit

hand for possible use.

SC 5180-90-N26

If used indoors, ensure vehicle exhaust and

M54 Smoke Generator exhaust is vented to

Materials

the outside.

Rags (Item 11, App E)

Ensure that proper hearing protection is worn.

Equipment Condition

Vehicle engine running and M157 system is

fully mission capable.

INSTALLATION

NOTE

Water manifold assembly can be used to test the proper operation of the

M157 Smoke Generator System's M54 Smoke Generator without the use of

fog oil. This is done by supplying water into the M54 Smoke Generator

combustion chamber. Water from a commercial/industrial water pressurized

source via a garden hose or equivalent is used for the following procedure.

Ensure water manifold assembly (Fig. F-29) (1) adapters and connectors are securely connected

and fastened together, ensure fluid valve (2) is completely closed.

Connect water delivery hose with an attached garden hose male thread adapter (3) to the water

manifold assembly bushing adapter (4). Connect other end of water delivery hose to the water

source. Length of the water delivery hose can vary depending on site layout, facilities, motor pool

area, etc.

Remove cap nut (5) from water manifold assembly and retain for later use.

Remove fog oil tube assembly elbow (6) from the tested M54 Smoke Generators (10) cover

assembly fog oil tube nipple (7). Position fog oil tube assembly (8) so that water manifold male

thread tube reducer (9) can attach to the female thread elbow (6) and connect the two together.

Connect retained cap nut (5) to the cover assembly's fog oil tube nipple (7) and tighten to prevent

any fog oil from escaping. This will ensure that when FOG OIL switch on control panel is placed in

the START, RUN position that the FOG OIL indicator light will come on.

Start up the M157 Smoke Generator System for normal operation (P. 2-10.6), start the M54 Smoke

Generator (10) being tested and when the control panel SMOKE TEMP indicator reads in the

GREEN temperature range, turn on the water supply source and slowly open fluid valve (2).

Regulate opening/closing of fluid valve (2) so that the tested M54 Smoke Generator (10) operating

temperature stays in the GREEN range.

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