• A Seal housing Assembly 29044-3000.
• Unscrew the seal housing assembly (key 18) using a 24mm
(15/16") spanner/wrench and remove the entire piston rod
assembly from the toilet.
• Wrap some tape around the piston rod within 16mm (5/8")
of the handle. Grip the piston rod through the tape, unscrew
the handle and remove the bumper washer (key 25). Remove
the tape.
• Slide the old seal assembly off the piston rod. Wrap one turn
of tape around the thread at the top of the piston rod to protect
the new seal and slide the new seal assembly onto the piston
rod. Remove the tape from the thread.
• Wrap some tape around the piston rod within 16mm (5/8") of
the handle. Grip the piston rod through the tape and replace
the bumper washer and handle. Remove the tape from the
piston rod.
• Slide the whole assembly back into the pump cylinder and
tighten in place.
CAUTION: Gripping the piston rod with a tool
anywhere except on the 16mm (5/8") below the
handle damages the surface in a way that causes
rapid seal failure.
3. Servicing - Winterisation
Drain the complete system, both as protection against frost dam-
age and to discourage the growth in the pipework of anaerobic
bacteria that cause unpleasant smells.
• Open any secondary valves.
• Remove the base drain plug (key 8).
• Disconnect the discharge flange (key 32) from the pump
(avoiding the need to remove the hose from the discharge
elbow (key 34).
• Loosen hose clamps and disconnect the hose ends from both
seacock hose tails. Pump the handle (key 17) to drain the
toilet pump and ensure that all water is drained from the toilet
system.
CAUTION: The use of anti-freeze is NOT
RECOMMENDED, as it is impossible to ensure that
it penetrates the complete toilet system. If, for any
reason, anti-freeze is used it MUST be glycol based.
If you plan to overhaul the toilet in the spring, this is a good time
to disassemble it and take the components ashore to make the
overhaul easier.
HAZARD RISK: Seacocks opened by mistake.
If you leave the toilet disassembled and, if the seacocks are
opened when the craft is afloat, water will flood in and may cause
the craft to sink, which may result in loss of life.
Therefore, you MUST attach a warning notice to the seacocks and,
if possible, wire the seacocks shut.
ATTACH WARNING NOTICE!
If you are not disassembling the toilet:
• Reconnect all hose ends and secure them with their hose
clamps.
• Replace the base drain plug securely.
• Replace the joker valve in the discharge elbow.
• Reconnect the discharge elbow and hose to the cylinder using
the discharge flange, whilst relieving any leverage from the
discharge hose. If you do not, the joint may not seal.
• Fasten down the seat, lid and pump handle to prevent use and
attach a warning notice.
4. Servicing - Overhaul
YOU WILL need:
• A Service Kit, part number 29045-3000, which contains all
wearing parts - refer to the PARTS LIST for details.
Remove the pump assembly as follows:
• Loosen hose clamps; disconnect the inlet hose and the flush-
ing water hose (key 4) from the top of the pump.
• Remove the 2 screws (key 31) that secure the discharge flange
(key 32) that holds the discharge elbow (key 34) and hose to
the pump cylinder (key 28).
• Do NOT remove the hose from the discharge elbow.
• Remove the 4 screws (key 31) that secure the pump cylinder
to the base.
• Lift off the pump assembly and pick up the base valve gasket
(key 16) and the joker valve (key 33).
Dismantle the pump assembly as follows:
• Remove the 6 screws (key 26) that secure the valve cover (key
27).
• Open
the Flush Control (key 23) before lifting off the
valve cover assembly and picking up the top valve gasket (key
21), the valve seat (key 19) and the valve spring (key 35).
• Remove the handle and the seal assembly by following the
SERVICING INSTRUCTIONS for SEAL REPLACEMENT.
• Withdraw the piston assembly (key 29) and piston O-ring
(key 30).
• Do NOT remove the bowl from the base
• Clean and disinfect all parts - refer to OPERATING INSTRUC-
TIONS for CLEANING. Remove scale from the cylinder bore.
• Inspect the top and bottom valve gaskets (key 21) and the
joker valve, and renew them if they are damaged, stiff or
covered with scale. Automatically renew the seal assembly and
the piston O-ring. Use the other parts in the kit as necessary.
Reassemble the pump as follows:
• Push on the new O-ring (key 30) and lubricate with silicon
lubricant.
• Following the SERVICING INSTRUCTIONS for SEAL REPLACE-
MENT fit the new seal assembly (key 18), the piston assembly
(key 29) and the handle (key 17).
• Lubricate pump cylinder bore with silicon lubricant.
• Locate the valve seat (key 19) on top of the cylinder, locate the
top valve gasket (key 21) on its pegs on top of the cylinder,
locate the valve spring (key 35) on its peg in the valve cover,
and Open
the valve cover (key 27).
• Locate the joker valve (key 33) in the discharge elbow (key 34).
• Secure the discharge elbow and hose to the cylinder, using the
discharge flange (key 32), BEFORE you refit the pump assem-
bly to the base (key 7), so that the joint is not under leverage
from the discharge hose. If you do not, the joint may not seal.
• Locate the bottom valve gasket (key 16) on its pegs on the
base.
7
the Flush Control (key 23) before refitting