Thetford SC400 Repair Instructions

Vent button

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Description: SC250/400 Vent button

Part number: 0752492/3230716

Look for Service Centres, Point of Sale addresses and other

information on: www.thetford-europe.com

Version:

Date:

Tools required:

Using the sliding cover

as a lever rotate the

complete mechanism anti

clockwise until the arrow

points to the second dot.

Take complete

mechanism out.

While pressing with

your thumb the button

in, pull on the inside

the seal retainer loose.

51305

Repair instruction

April 2010

1/2

04/10

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Summary of Contents for Thetford SC400

Page 1 Repair instruction Description: SC250/400 Vent button Part number: 0752492/3230716 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: April 2010 Tools required: Using the sliding cover as a lever rotate the complete mechanism anti clockwise until the arrow points to the second dot.
Page 2 Take new seal retainer and place it through the hole where the button needs to be pressed in. Press button with spring back into position. Place mechanism and use sliding cover in reverse to position back into the tank. 51305 04/10...
Page 3 Repair instruction Description: Pump C402C/X Part number: 16374 Look for Service Centers, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: 09/11/2006 Tools required: Knife + blow-drier + wire stripper + crimps C402 C/X toilet. Remove the handle.
Page 4 Remove the seal from the control well. Take the pump out of the watertank. Cut the cable just above the pump with the wire stripper. Cut the white wire insulation off so that the blue and brown wire stay intact. Strip the blue and brown wire with the wire-stripper.
Page 5 Melt the shrink tube with the blow drier. Will prevent a short circuit. Replace the pomp. Replace the seal in the control well. Replace the control well. Replace the control panel. Replace the handle. 09/11/2006 Description: Pump C402...
Page 6 Repair instruction Description: Relais C403L Part number: 20106 Look for Service Centers, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: 05/06/2006 Tools required: C403L toilet. Control panel C403L. Remove the handle. Remove the control panel. Unscrew the screw from the relais.
Page 7 Place the new relais on to the connection relais. Screw the new relais into the control well. Replace the control panel. Replace the handle. Pictures 05/06/2006 Description: Relais C403L...
Page 8 Repair instruction Description: Blade fuse C400 Part number: 21766 Look for Service Centers, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: 13/07/2006 Tools required: C400 toilet. Pull the waste tank out of the Cassette toilet by lifting up the green clip.
Page 9 Repair instruction Description: Electric Valve C403L Part number: 23709 Look for Service Centers, Point of Sale addresses and other information on: www.thetford.eu Version: Date: 02/06/2006 Tools required: C403L toilet. Remove the handle. Remove the control panel. Remove the control well.
Page 10 Unscrew the hose barb. Remove the water tube from the electric valve. Replace the water tube on the new electric valve. Screw the hose barb onto the electric valve. Replace the connectors onto the electric valve. Replace the vacuum breaker by pressing against the upstanding rib.
Page 11 Replace the handle. 09/11 Description: Leaflet 51321...
Page 12 Repair instruction Description: SC400 Blade opener Part number: 3230016 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: April 2010 Tools required: Using the sliding cover as a lever rotate the complete mechanism anti...
Page 13 Press two ribs from blade opener in which allows to pull out the blade opener from the other side. Note: While pressing blade opener out, press with your thumb on the blade, will hold the mechanism together. For assembling new blade opener, follow the steps in reverse. Note: when placing the retainer please make sure that the white pin...
Page 14 Repair instruction Description: SC400 Holdingtank plate left/right Part number: 3230206/3232806 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: April 2010 Tools required: Crosshead screwdriver/flat screwdriver Using the sliding cover as a lever rotate the...
Page 15 Press two ribs from retainer in and take it off and remove blade arm?. Take 1 screw out of bushing and remove blade driver. Take bushing out and remove blade. Place flat screwdriver between retainer and rib and take complete float arm out.
Page 16 Take 6 screws out of seal retainer and take lip seal out. Remove seal of mechanism. For assembling mechanism follow steps in reverse. Note: when placing the Note: when placing the seal retainer please retainer please make make sure that the sure that the white pin small pivot is falling in is situated on the dot...
Page 17 Repair instruction Description: SC400 Float arm Part number: 32304 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: April 2010 Tools required: Flat screwdriver Using the sliding cover as a lever rotate the complete mechanism anti...
Page 18 Place new float arm by pressing in the retainer. Place complete mechanism back and use sliding cover in reverse to position complete mechanism back into the tank. 51300 04/10...
Page 19 Repair instruction Description: SC400 Automatic vent Part number: 32305 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: April 2010 Tools required: Flat screwdriver Using the sliding cover as a lever rotate the complete mechanism anti...
Page 20 While going with one hand in the waste- holdingtank, press the float from the top so that the foam-float can be turned out from within the Holding tank. Now the seal can be pulled out. For assembling new automatic vent, follow these steps in reverse. 51301 04/10...
Page 21 Repair instruction Description: SC400 HT Wheels Part number: 3230806 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: April 2010 Tools required: Turn the waste- holdingtank upside down. Push/pull the wheel out of it’ s situe.
Page 22 Repair instruction Description: SC400 Control panel Part number: 32313-62/32320-62/32322-62 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: June 2010 Tools required: Remove the handle and, remove the control panel. Remove the plugs on the control...
Page 23 Repair instruction Description: SC403L/402C/402X Overlay Part number: 32314/32321/32323 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: April 2010 Tools required: Pull overlay loose from control panel. Place new overlay. Note: holes which are shown when overlay has been taken off, is depending of the toilet type.
Page 24 Repair instruction Description: SC402 Waterfill funnel Part number: 3231506 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: April 2010 Tools required: Take waste- holdingtank ot of the toilet. Swing the waterfill funnel outside and press it down.
Page 25 Repair instruction Description: SC400 Reed switch waste-holding tank Part number: 32316-62/32317-62 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: June 2010 Tools required: Pull the waste tank out of the Cassette toilet by lifting up the green clip and remove the reed switch.
Page 26 Repair instruction Description: Reed Switch WT C402X Part number: 32317-62 Look for Service Centers, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: 02/06/2006 Tools required: C402X toilet. Pull the waste tank out of the toilet by lifting up the green clip.
Page 27 Screw the reed switch WT back into the toilet. Place the waste tank back into the toilet. 02/06/2006 Description: Reed switch C402X...
Page 28 Repair instruction Description: SC400 Wire harness Part number: 32319 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: June 2010 Tools required: Cutter, nose pliers, philips screwdriver Note: for this repair the toilet needs to be removed from the vehicle.
Page 29 Swing waterfill funnel out. Look up inside the toilet where you will find the pivot of the shaft, is held by 3 screws. Remove spring from shaft. Remove 3 screws from pivotting bracket, and remove bracket. 51318 06/10...
Page 30 Remove tyrap on cable inside and backside of the toilet. Remove reed switch housing by pressing both lips on the side. Release connector by pressing lip on connector housing. Follow steps in reverse to connect new wiring harness. 51318 06/10...
Page 31 Repair instruction Description: SC400 Outside vent Part number: 32324 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: June 2010 Tools required: Remove waste- holdingtank out of Cassette toilet. Remove cover inside where location of outside...
Page 32 Remove protection of foam and place it on top of the cover. Place cover back into base of the toilet Note: Tube will be connected to the bottom of the waste- holdingtank. 51317 06/10...
Page 33 Repair instruction Description: SC400 Waterfill extension Part number: 3232916 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: April 2010 Tools required: Swing waterfill funnel to the outside, remove cap and press waterfill extension in.
Page 34 Repair instruction Description: SC400 Float box Part number: 32330-62 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: June 2010 Tools required: New float box Press the flush button to empty the water tank and,...
Page 35 Go inside the water tank and disconnect the nozzle by pulling It (inside the toilet) down. Take complete pump and flush tube out the water tank and, take the float box out. Fit new float box Push float box completely down, between the two ribs.
Page 36 Place the pump and flush tube back in the inside of the water tank Push the nozzle back into the toilet- bowl, (inside the toilet, you have to hear a click when pressing the nozzle in) Refit control panel and handle 51319 06/10...
Page 37 Repair instruction Description: SC400 Holdingtank mechanism R/L Part number:3233106/3233206 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: April 2010 Tools required: Using the sliding cover as a lever rotate the complete mechanism anti...
Page 38 Repair instruction Description: SC250/400 Pour out spout Part number: 5071992/3230606 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: April 2010 Tools required: Turn pour out spout anti clockwise and take it out. Place new pour out...
Page 39 Repair instruction Description: SC400/C500 Shaft Part number: 51802 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: June 2010 Tools required: Philips screwdriver Remove waste- holdingtank out of Cassette toilet and pull handle from control panel.
Page 40 Look up inside the toilet where you will find the pivot of the shaft, is held by 3 screws. Remove spring from shaft. Remove 3 screws from pivotting bracket, and remove bracket. Remove link from shaft, and take shaft out of. Follow steps in reverse to place new shaft.
Page 41 Repair instruction Description: SC400 Handle Part number: 5180362 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: April 2010 Tools required: Pull handle of control panel and press new handle in. 51311 04/10...
Page 42 Repair instruction Description: SC402 Drain tube Part number: 5180474 Look for Service Centres, Point of Sale addresses and other information on: www.thetford-europe.com Version: Date: April 2010 Tools required: Press black tube out of bracket and pull sight tube out of drainplug.
Page 43 Pull black tube of the toilet. In case bracket also needs to be replaced, pull it out. Follow the steps in reverse to place the new drain tube. 51312 04/10...

This manual is also suitable for:

Sc250 0752492 3230716