Thetford 19624 - Mechanism Plate - Manual (Page 2)

Part #19624
Mechanism Plate Package Continued
2. Line up well-nut assemblies on the mechanism plate with the holes in
the china bowl. Then line up the openings and press into place. Lightly
hand-tighten the well-nuts to temporarily secure its position.
To Replace Mechanism
1. Wet blade seal with clean water.
2. Fully seat blade seal, lip up, onto Mechanism Plate (Fig. E).
3. To avoid damaging blade seal, make sure blade in new mechanism is
fully closed. Turn mechanism lead screw counter-clockwise to close valve
(Fig. E).
4. Connect 2 Motor Leads, yellow-yellow, green-green.
5. Working from the back, position Mechanism in Toilet. NOTE: on some low-
profile units, it may be a tight squeeze. Align mechanism over Mechanism
Plate, press down and secure with four screws (MS, Fig. C).
6. Turn toilet over to check centering. Loosen well-nuts to re-center if needed.
Do the permanent tightening down of the well-nut screws at this
time by hand. Tighten in a diagonal pattern to get an even seal. Be
careful not to overtighten and cause deflection of the plate at the
edges. Wipe off excess sealant when done.
7. Cut approximately 1” off Overflow Tube. Forming a full loop, reattach to
Mechanism. Tuck in and away from lead screw.
8. If you removed the Controller Assembly and/or the Switch Box, re-install
now, using the adhesive foam pads provided. If you removed Metal
Bracket, reinstall.
9. High Profile: To install Extension Tube (Refer to Fig. D):
a. Lubricate sealing surface of Extension Tube Seal with silicone
grease.
b. Install Extension Tube Seal on Extension Tube.
c. Install Extension Tube and seal assembly on Mechanism. Make sure
that seal is seated at least 1/2 inch below Mechanism tube lip.
d. Ensure Hose Clamp on Mounting Flange Seal is tight.
e. Lubricate Mounting Flange Seal sealing surface with Silicone
Grease.
f. Install Mounting Flange and Seal assembly on Extension Tube. Make
sure there is at least a 1/2” overlap between the Extension Tube
and Mounting Flange Seal.
Low Profile: Replace the Mounting Flange Seal onto the lip of the
Mounting Flange. Install Mounting Flange to Mechanism. (No exten-
sion tube is used.)
10. Replace 2 Mounting Bushings with flat surface out.
To Test Mechanism Operation
1. Connect toilet to RV’s 12V DC power.
2. Turn on 12V DC to toilet at RV power distribution panel.
3. Press the Flush button on Key Pad and observe mechanism operation.
The solenoid valves will click on and off during the flush cycle.
4. Press both Key Pad buttons, twice, to open blade.
To Replace Toilet To Floor
1. Secure new Closet Flange Seal, lip side up, to Toilet.
2. Set Toilet close enough to hook up water supply.
3. Reconnect Water Supply Line.
4. Turn on water and check for leaks at the water connection. Correct any
leakage.
5. Position Toilet over flange. Arrange wiring clear of Mechanism Lead
Screw (Fig. E) and base of toilet.
6. Secure to floor with Lag Screws. Tighten.
7. Press Toilet flush button controls to add water and to flush test. Check
for leaks.
8. Resecure Bolt Caps.
Mounting
Flange
Shown
separate for
clarity – these
items nor-
mally remain
assembled
HIGH
PROFILE
ONLY
Extension
Tube
Mounting
Flange Seal
Extension
Tube Seal
Clamp
Fig. D
Mechanism
Tube Lip
Mechanism
Flat Foam
Seal
Mechanism
Lead Screw
Blade
Seal
Mechanism
Plate
Caulk Sealant
Fig. E
Well-nut
ass’y