TM 3-6665-209-35
CHAPTER 3
FIELD MAINTENANCE INSTRUCTIONS-FOURTH ECHELON
Section I. GENERAL
20. Special Tools
authorized to repaint the indicator as necessary. Refer
to TM 9-213 for painting instructions for field use.
No special tools are required for fourth echelon
b. Paints to be Used.
maintenance of the indicator.
(1) Primer. Use synthetic paint primer before
painting any surface requiring a painted
21. Equipment
finish.
(2) Exterior paint. Repaint exterior surfaces
No special equipment is required for fourth echelon
of components which require paint with
maintenance of the indicator.
black wrinkle paint.
22. Painting
a. General. Fourth echelon personnel are
Section II. CHASSIS GROUP
23. Chassis Assembly
(e) Balance orifice holder. Remove the
balance orifice holder (par. 11).
a. Description. The chassis assembly is the major
(f) Motor
and
pump
assembly.
unit of the indicator. It is described in paragraph 7 while
Remove the motor and pump
its subassemblies are described in the succeeding
assembly (par. 12).
paragraphs.
(g) Air shutoff valve assembly. Remove
b. Maintenance.
Fourth echelon maintenance
the air shutoff valve assembly (par.
personnel are authorized to replace all components of
the chassis assembly.
Maintenance of those
(h) Electric chassis assembly. Remove
components not authorized to lower echelons of
the electric chassis assembly
maintenance personnel will be covered in the following
(TM 3-6665-209-12).
paragraphs.
The procedures below describe the
(i) Calibrator assembly. Remove the
complete dismantling of the chassis assembly.
calibrator assembly (par. 25).
However, disassembly procedures for the electric
(j) Pressure gage.
chassis assembly, the calibrator assembly, and the
1. Disconnect the tube coupling
motor and pump assembly are covered in separate
nut that connects the copper
paragraphs.
tubing (57, fig. 4) to the center
(1) Removal and disassembly.
connection of the pressure gage
(a) Chassis assembly.
Remove the
(9).
chassis
assembly
2. Remove
three
nuts
(29),
(TM 3-6665-209-12).
lockwashers (28), and screws
(b) Electric bell DS5.
Remove the
(10) which secure the pressure
electric bell DS5 (par. 8).
gage to the front panel (42, fig.
(c) Fuse holder XF1. Remove the fuse
3). Work the pressure gage out
holder XF1 (par. 9).
through the rear of the front
(d) Indicator lights.
Remove the
panel.
indicator lights (par. 10).
( k ) VALVE fixture.
1. Pull the rubber tubing (16, fig. 4)
AGO 8069A
22