Hudson Terraplane Special 1935, Owner'S Manual

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Cooling System
Water Pump
The water pump is of the 6-vane type and is mounted in the forward end of
the cylinder head. The roller bearing at the forward end of the pump shaft
should be lubricated at 1,000-mile intervals through the pressure fitting shown
at (C), Figure 6, using a high-grade water pump grease.
The packing gland nut (D) should be drawn up only finger tight. Do not use
a wrench for tightening. If leakage occurs after tightening, or if nut goes to the
bottom of the thread, additional packing should be added.
Care of the Cooling System
In order to get the maximum efficiency from the cooling system, it must be
kept clean. There is a tendency toward corrosion of parts due to electrolytic
action of water containing minerals and also deposits of minerals when the
water is heated. Both the corrosive scale and the mineral deposits tend to coat
the cooling surfaces, reducing radiation, and in time will clog the radiator
passages.
Unless special steps are taken to prevent these deposits, the cooling system
should be cleaned twice a year. This cleaning is most effective when reverse
flushing is used to remove deposits after they have been loosened by the use
of a good cleaning solution. Since reverse flushing requires special equipment
operated by compressed air, you should have this done by an Authorized
Terraplane and Hudson Dealer.
The cleaning solution recommended is Terraplane Hudson Radiator Cleaner.
Before using this solution, run the engine a few minutes to circulate the water and
stir up loose sediment. Stop the engine and open radiator petcock and drain all water
from the system.
Dissolve the contents of the container in a bucket of hot water (be sure the
material is completely dissolved). Pour solution into radiator, then fill the
radiator almost full of water.
With the radiator covered and filler cap tight, run the engine for about
twenty minutes but avoid boiling. Stop the engine and completely drain system.
Reverse flushing will remove all of the sediment the solution has loosened.
It is important that all traces of the cleaning solution be removed, as they have
a detrimental effect if left in the system.
22 TERRAPLANE SPECIAL SIX