Thetford 19621 User Manual
RV Toilet Service Parts
for
Aria Deluxe II
Tools needed
• Flat-blade screwdriver • Pliers
• Adjustable Wrench
• DAP Dynaex Caulk or equivalent (available at most hardware
stores)
Note:
• Read all instructions before beginning work.
•
You may not need to replace all the Seals in this package.
• All replacements will require removing toilet from oor.
• Use gloves when handling parts that may have come in contact
with waste.
To Remove Toilet From Floor
1. Turn off RV water supply per RV Owner’s Manual.
2. Press both keypad buttons at the same time, twice, to open blade
and drain bowl of water.
3. Pry off Bolt Caps with Flat-blade screwdriver. Use wrench to
remove 1/2-inch Lag Screws.
4. Swivel Toilet to gain access to back.
5. Turn off RV’s power supply to the Toilet.
6. Disconnect Water Supply Line with Adjustable Wrench (Fig. A).
7. Disconnect Toilet’s 12-volt power hookup to RV.
Seal Replacement Package
Part #19621
Fig. A
Water supply
hookup
Power supply
connector
8.
Place an old towel or soft cloth on work surface. Remove Toilet from oor
and place upside down on work surface.
9. Remove old Closet Flange Seal (may be found in toilet or in oor
at Closet Flange). Discard.
10. Cover Holding Tank opening to contain odor.
Replacement of Blade Seal, O Ring Seal and Hopper Seal
To Remove Parts
1. Tap out 2 Mounting Bushings (Fig. B).
2. Remove Mounting Flange and Flange Seal.
3. High Prole models only: Remove Extension Tube. It may
be found connected to Mounting Flange or to the Mechanism.
Remove Tube Seal.
4.
if you need to replace the Blade Seal, remove 4 Mechanism Screws
without Washers (MS, Fig. C). If not, remove the three screws shown
with washers (no arrows).
Fig. B
Mounting Flange
Mounting Bushing
5. Lift Mechanism Assembly off Seal. Pull out carefully through back
of toilet, just far enough to gain access to the seal(s) to be replaced.
(No need to disconnect/remove motor wiring, Overow Tube or
Sound Deadening Insulation – if present – from Mechanism.)
To Replace Blade Seal
1. Remove Blade Seal (may be attached to white Mechanism Plate).
Discard. Fit new seal in its place.
Fig. C
Form #19639B
Mechanism
White Mechanism Plate
Rev. 01/22/08
Part #19621
Seal Replacement Package Page 2
To Replace O-Ring Seal
If you do not need to replace this seal, skip down to Re-install Mechanism sec-
tion below.
It is not necessary to remove Mechanism from toilet to install this seal. If you decide
to remove it, disconnect the Overow tube from top of Mechanism by twisting it off.
Then disconnect the yellow and green Motor Lead, using pliers if necessary.
1. Remove the Sound Deadening Kit insulation (if present) from Mechanism by
unwrapping the VelcroTM strap.
2. R
emove 6 End Cap Bolts from Mechanism. Remove End Cap (Fig. D).
3.
Grasp Gear/Clutch Assembly (Fig. E) and pull it out of the housing. This retracts
Fig. D
Overow Tube
Lead Screw into the Valve Blade. Release the Valve Blade. (Caution: wear
gloves when handling Valve Blade or anything that may have
come in contact with waste.)
7. Re-engage the large gear with the small pinion gear (Fig .E) and slide the Gear/
Clutch/Lead Screw Assembly fully into the housing.
8. Make sure curved washer is in place on the Lead Screw, concave side facing
toilet. Reinstall End Cap and secure 6 Screws.
9. Replace the Sound Deadening Kit insulation (if present) onto Mechanism, securing
it with the VelcroTM strap.
If you have removed Mechanism from toilet, do these steps now:
1. Reattach Overow Tube to Mechanism.
2.
Reattach 2 Wire Motor Leads, yellow to yellow and green to green.
Fig. E
Pinion
Gear
Mechanism
End Cap
the Valve Blade fully. The Lead Screw (Fig. F) is engaged in the Lead Screw
Boss on the Valve Blade (not shown).
4.
Turn Lead Screw counterclockwise until it releases from the Valve Blade.
Withdraw the entire Gear/Clutch/Lead Screw Assembly.
5. On the back side of the Gear/Clutch subassembly (Fig. F) you will nd a small
black “O” Ring. Slide it off and replace it with the new one.
6. Slide the Gear/Clutch/Lead Screw Assembly back into the housing. Holding
the Valve Blade, turn Lead Screw clockwise enough turns to fully engage the
Mechanism Lead Screw (knob
shown not on all units)
To Replace Hopper (Bowl Opening) Seal
If you do not need to replace this seal, skip down to Re-install Mechanism
section below.
1. Unscrew 3 Well Nut Screws with Washers (shown without arrows in Fig. C, page
1) to free white Mechanism Plate.
2. Scrape off old Seal on china with sharp tool. Use mineral spirits to remove
residue.
3. Apply a generous ring of caulk sealant around Bowl Drain opening (Fig. G, next
page).
4. Apply Flat Foam Seal to caulk sealant. Press down in place, center the seal, and
Gear/clutch assembly
Fig. F
Gear/clutch assembly
Lead
Screw
wipe away any excess sealant squeezed into opening.
To Replace Mechanism
1. Wet blade seal with clean water.
2. Fully seat new blade seal, lip up, onto Mechanism Plate (Fig. G).
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. D).
4. Connect 2 Motor Leads, yellow-yellow, green-green (Fig. A).
5. Working from the back, position Mechanism in Toilet. NOTE: on
“O” Ring
Seal
Loading...