TM 10-4610-244-13
TM 09476B-13/1
5-6. REPAIR PUMPHEAD ASSEMBLY (Cont'd).
b
REPAIR
(1)
Clean all components with soapy water.
(2)
Inspect diaphragms (3 and 8) for tears, holes, or brittleness. If damaged, replace.
(3)
Inspect dial gear (16) for bent, damaged, or missing teeth If damaged, replace.
(4)
Inspect dosage control knob (12) for damaged threads, and spline gear on dosage control knob for
damaged teeth. If damaged, replace dosage control knob.
(5)
Inspect pumphead (2) for clarity If it cannot be seen through, replace.
c.
ASSEMBLY
(1)
Place star washer (19) over hole in flange of cover (7)
(2)
Place dial holder (18) over star washer (19) and install screw (17).
(3)
Install preformed packing (13) on dosage control knob (12), and install dosage control knob.
(4)
Install dial gear (16), making sure that teeth match with dosage control knob (12), and
position dial cover (15) over dial gear and install screw (14).
(5)
Position pad (11) on dosage control knob with beveled end up.
(6)
Install screw (10).
(7)
Install water side diaphragm (8) and spring (9).
(8)
Place cover (7) over water side diaphragm (8) with mounting base on flange aligned with tell-tale drain.
WARNING
The water side diaphragm is under spring pressure, uncontrolled release may cause injury.
Maintain pressure on the water side diaphragm when removing it during maintenance.
(9)
Install two screws (6) through flange on cover (7), diaphragm (8), and cylinder (5), and tighten enough to
hold assembly together
(10)
Install and tighten all remaining screws (6).
(11)
Lubricate and install stud (4) on chemical side diaphragm (3)
(12)
Install chemical side diaphragm (3).
(13)
If the holes in chemical side diaphragm (3) do not line up with the holes in cylinder (5), unscrew chemical
side diaphragm until they line up
(14)
Install plastic head (2), making sure one of fittings for discharge and suction valves will line up with tell-tale
drain when installed
5-5
