",Cc
'.
:
,
i
, 28. CHECKING THERMOSTAT, 1. Remove pressure cap (1) and open
CLEANING THERMOSTAT drain cocks on water pump.
STRAINER 2. Drain oH anti-freeze into an emty
(At least once annually): caD.
1 6 "J 3. Remove thermostat housing (2) and
! withdraw thermostat (3). Place it in
~ lt' 2 hot water at a temperature above
, "" ~ 60° C. The thermostat should now
~ """ i 3 open and close again when placed in
, ~ cold water.
~ j' 4. Remove thermostat cover (5) and
~.. ~ . wash out strainer in gasket ( 6) .
, I , Thermostat and strainer caD be
I !I~ 5 washed in white spirit if necessary.
~I ~ Ifc ~ If the thermostat does not function,
~ the installation can be run witbout a
" / thermostat provided the by-pass
v' pipe in blanked oH.
/î 5. Re-assemble. Ensure that the cor-
rect amount of anti-freeze is added
Fig. 42 during topping up. Oase the drain
cocks.
8--,--9 10 7
29. CHECKING THERMOSTAT 8 '~
jJ(1974 Model): ~~~:::~J-?> - ~
11 1. Disconnect the return hose (11) trom the after ~"',.~ -
end of the fresh water header tank. I . .-;--
2. Remove pressure cap (7) to allow air into the ~ i; I
tank and drain oH the anti-freeze into an ~
empty caD via the nipple at the after end of
thetank.
Undo the Duts (9), lift oH the fresh water
tank (10) and remove the thermostat (8).
Place it in hot water at a temperature above
60° C. It should now open, then close again
when placed in cold water. If necessary, wash
the thermostat in white spirit.
If the thermostate does not function, the I
~installation can be run without a termostat
provided that the by-pass pipe is blaked oH.
4. Re-assemble. See item 5 above. Fig. 43
34
'~:l~?~(c
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