Section XII. WATER TANK AND FRAME ASSEMBLY
116. Water Tank and Frame
a. Description. The water tank and frame assembly consist of the water tank, frame, guard rails, and
catwalk. These are assembled into one welded unit. The water tank is oval in cross section and is galvanized
for corrosion resistance. Wood sleepers are used between the carrier frame and the distributor frame.
b. Removal.
(1) Disconnect wiring harnesses at rear of carrier chassis.
(2) Remove spare tire.
(3) Remove the sixteen tiedown bolts (5,fig. 8) and tiedown bars.
(4) Attach suitable slings to the lift eyes at the front and rear, on left and right sides of the distributor
frame.
(5) Using a crane with a minimum of 3 ton-capacity lift the assembly clear of the carrier.
(6) Place the distributor on suitable blocking that is of adequate strength and stable enough to permit
work on the assembly without creating a safety hazard.
d. Installation.
(1) Position sleepers on carrier frame rails (fig. 8).
(2) Attach cable slings to four lifting eyes (1). Lift distributor tank and frame assembly using a crane
with a 3-ton capacity and position on carrier frame rails.
(3) Install sixteen tiedown bars and bolts.
(4) Connect wiring harness.
117. Manhole Cover
a. Description. The water distributor tank is equipped with a 20-inch diameter manhole cover for filling
and inspecting the tank. The tank vent is located on the manhole cover. The manhole cover is hinged at the
front and is secured at the rear by a 6-inch crank screwed onto a bolt hinged to the outside of the manhole.
b. Manhole Cover, Removal and Disassembly.
(1) Open manhole cover by unscrewing crank.
(2) Remove hinge bolts at front and rear of manhole.
c. Manhole Cover, Cleaning, and Inspection.
(1) Clean machined parts in an approved solvent.
(2) Inspect threads and replace or repair defective parts.
(3) Inspect manhole cover gasket and replace if defective.
d. Manhole Cover Installation.
(1) Position manhole cover hinge bushing in bracket at front of manhole and install hinge bolt.
(2) Position crank bolt in bracket at rear of manhole and install hinge bolt.
118. Spraybar Takeup Assembly
a. Description. The spraybar takeup assembly provides for the vertical adjustment of the spraybar
position by means of two jack screws operated by a crank and connected by a roller chain meshed with a
sprocket on each screw. In addition, the spraybar takeup assembly permits lateral adjustment of the spraybar
position by providing rollers which support the spraybar assembly.
b. Removal.
(1) Remove spraybar assembly (para.115).
(2) Remove roller chain from sprockets by removing connecting link.
(3) Remove left and right spraybar takeup bracket from distributor by removing two bolts and nuts
holding each bracket.
c. Disassembly.
(1) Remove pipe rolls from pipe roll frame by prying retainers off ends of pipe roll shafts.
(2) Do not remove jack screw from assembly because the top bearing in thespraybar takeup bracket is
pressed in the bracket.
AGO 6871A
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