with a cloth dampened in cleaning solvent.
(2) Wash the diaphragm in warm, soapy water, rinse with clear water and dry thoroughly.
(3) Inspect all parts carefully for damage. If the diaphragm is torn or shows signs of deterioration, replace it.
Weak or broken springs, bent tubes and similarly damaged parts must be discarded and replaced.
d. Reassembly (fig. 45).
(1) Assemble the unloader valve (10) to the valve bracket (8) and install the lock nut (7). Assemble the kickoff
valve (16) into the frame casting (15) and install the lock nut (7).
(2) The tubes (13 and 14) are soldered to the couplings (5). Screw the couplings into the outer diaphragm
casting (4). Assemble the diaphragm (40), plunger disk (39) and inner diaphragm casting (38) to the outer
casting (4), carefully alining all screw holes. Fasten this group together with ten :y.-inch long screws (1)
inserted through all but the top and bottom center holes in the outer diaphragm casting. Attach the
diaphragm group to the frame casting with the longer screw (3) at the top and the shorter screw (2) at the
bottom.
(3) Screw the elbows (11) onto the valves (10 and 16) and connect the tubes (13 and 14) to the elbows.
(4) Insert the main arm (34) into the frame casting with the pivot end behind the cast bracket arm of the inner
diaphragm casting. Aline the pivot hole in the main arm with that in the cast arm and install the pivot pin
(35).
(5) Insert the felt washer (23) in between the two arms of the trip lever (24). Insert the valve plunger pin (6) up
into the unloader valve (10) and hold it in place while installing the trip lever on the trip lever screw (12). The
long stud of the trip lever will protrude through the frame casting to support the valve plunger pin. Secure
the trip lever with the lockwasher (25) and hex nut (26).
(6) Insert the leg of the valve plunger rod (20) through the drilled hole in the main arm (34) and install the spring
stud keeper (32) with the roundhead screw (31). Hook the extension spring (33) between the plunger rod
(20) and the keeper (32). Hook the trip lever spring (30) between the trip lever (24) and the spring stud in the
frame casting.
109
