bracket (32). Make sure the square shank of cam
between yoke (72) and washer (70) by valve guide
shaft fits into square in center of cam. Tighten
(65). A tight joint at this point is essential.
bearing securely.
(f) Install leather packing (80) and retainer
(79) in hypochlorinator body (82). If packing (80)
(b) See that cam lobes curve in direction
shown in figure 5-1. If the cam is reversed, it will
is hard, work a small amount of grease into it before
lock on the cam roller and the hypochlorinator will
installation. If packing is damaged use a new
leather packing.
not operate. After assembly the cam shaft should
rotate freely with no trace of friction or binding.
(g) Place one end of spring (73) over
(c) Assemble
cam
bracket
(32)
to
retainer (79) and slip pump shaft through both the
hypochlorinator body (82) with two screws (30)
spring and leather packing (80). Be careful to avoid
and washers (31).
damaging the leather packing.
(5) Install four studs (21), elbow (24), and
(2) The correct assembly of the rear housing
nipple (25) in hypochlorinator body (82).
portion of the hypochlorinator is important since
(6) Assemble and install pumping head
the proper pumping stroke length can be obtained
assembly as follows:
only if the correct relationship exists among the
parts involved in this assembly. When assembling
valve seats (16), poppet valves (15), gaskets (14),
perform the following:
and solution valve bodies (13) in pump body (8).
(a) Screw stroke adjustment nut (53) on
shaft (52) as far as it will go, Slip shaft through hole
adjust the pumping head diaphragm in
in center of housing (45) and be sure that guide pin
hypochlorinator assembly.
(51) passed through hole in adjustment nut (53).
( 7 ) Install hypochlorinator assembly in
(b) Place housing (45), shaft (52), and
automatic hypochlorinator unit as follows:
adjustment nut (53) on a flat block so that the
block supports the adjusting nut but clears the
controller and balancing water valve assemblies.
edges of the housing. Install dial (39), asbestos cord
packing (42) dipped in water-proof grease, packing
hypochlorinator assembly.
gland (41), and spring (40). Place pointer (36) in
(c) Check length of stroke as follows:
position so that spring (40) fits inside dial (39).
1. When stroke control pointer (36) is set
Push down on the pointer until setscrew (35) lines
at 10 on dial (39), driving yoke (72) should travel
up with the groove in shaft (52); then tighten
5 / 16 on the power (forward) stroke. The unit is
setscrew. An arbor press can be used for this
operation by using a piece of tubing, roughly
designed so that a 5 / 16-inch yoke movement
inch OD x inch ID to exert pressure on the
produces a -inch movement of pump shaft (76).
The yoke travel is influenced by the position of the
pointer.
(c) Turn pointer (36) clockwise until shaft
cam roller with respect to the cam.
2. Place the hypochlorinator assembly in
(52) locks in adjustment nut (53). The pointer
should be at 10 on the dial. If this is not the case,
operation and measure the length of driving yoke
loosen setscrew (35) slightly, hold the shaft, and
movement with the stroke adjusting pointer set at
adjust pointer position on shaft until proper ad-
10 on the dial. The movement of the yoke can be
justment is obtained. After correct position is
easily and accurately measured by clamping a piece
achieved, tighten setscrew securely.
of wire under one of the screws (54) which secures
the roller support bracket (55) to the driving yoke,
(d) Install handle (34) and secure with
locknut (33).
and bringing the free end of the wire outside of the
hypochlorinator body to serve as a pointer.
(3) Assemble and install the cam follower
assembly by reversing the steps given in paragraph
3. If the distance measured is more than
5 / 16 inch, loosen the two screws (30) and move
installed so that lower end of springs tend to push
cam bracket (32) back (away) from cam roller (61)
lever (58) towards valve diaphragm (71).
a small amount. If the movement is less than 5 / 16
inch, move bracket forward. When correct yoke
(4) Assemble and install cam bracket assembly
travel length of 5 / 16 inch is obtained, remove wire
as follows:
pointer (if used), and tighten screws (30 and 54)
(a) Slip cam shaft (28) through bearing
securely.
(27). Assemble cam (29), bearing, and shaft in
5-2
