Disassembling; Troubleshooting; Precaution For Assembly - Yoshitake GD-46 Series Instruction Manual

１ １． ３

Disassembling

(１ ) Remove the cap (17). Unscrew the adjusting screw (15) to free the adjusting spring (14) from the
load.
(２ ) Remove 6 round head screws (23) from the spring cover (11). Remove the cover (11) and
adjusting spring (14).
(３) Remove the valve cap (12) (nominal designation 27).
(４ ) While holding the hexagon head (nominal designation 10) of the cap nut (10), remove the hexagon
nut (4) (nominal designation 10) from the valve(2).
(５) Remove the set of diaphragm, valve (2) and washer (3).
１ １． ４

Troubleshooting

(１ ) Reduced pressure exceeds the predetermined pressure:
Check the status of the cap (17). If it is OK, follow the procedure described in 11.3 Disassembling,
steps (1)-(5) and check the diaphragm set, valve body and valve.
(２) Flow is low at a faucet:
Check the water shut off valve (41), strainer (19) and the pressure setting. If they are OK, follow the
procedure described in 11.3 Disassembling, steps (1)-(5) and check the diaphragm set and valve
body.
(３) External leakage:
Locate the leaking component and secure or retighten the related parts. If the leakage persists,
replace the associated O ring or gasket.
１１ ．５

Precaution for assembly

 CAUTION
(１) Confirm that the inside the valve body and components are free from foreign material
deposition.
※Foreign objects degrade performance and must be removed.
(２) Confirm that the valve and O ring are free from scar and damage.
※ Damaged component degrades system performance and must be replaced.
(３) Apply a coat of silicone grease (harmless to humans) to the O ring.
※ Silicone grease protects the surface of the O ring.
Assemble the unit in the reversal order of the disassembly.
Set screws (23) on the spring cover (11) must be tightened in a crisscross pattern with uniform
torque.
－13－
■EPDT-166f■