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Points to be careful about in cold season
1. Notice for housing/safekeeping
(1) Choose the good quality fuel. (Higher quality gasoline has higher volatility that makes it
easier to start the operation.)
(2) Keep the body of pump, vacuum pump and muffler free
from freezing. After using the pump, remove the water
and handle with antifreeze solution or alcohol. If needed,
take measure for warming.
(3) Always have antifreeze solution available.
(4) Make sure the vacuum pump is rotating, and in case of being
frozen by any chance, apply heat by pouring the hot water.
(5) Maintain the battery frequently.
2. How to put the antifreeze solution
(1) After draining the water completely from the drain cock of each part, tighten the pump
cover cap and close the drain cocks of water discharge valve, pump cover, cylinder
and muffler part as well as water discharge valve. Attach the tube on the drain port of
the muffler part drain cock and then put the opposite side into the antifreeze solution.
(2) After engine starts, position the water delivery lever to "water delivery" and operate the
vacuum pump for 5 seconds. If the compound gauge suggests the sufficient negative
pressure, return the water delivery lever to "water discharge" and stop the engine. If the
compound gauge does not suggest the negative pressure, make sure that the pump
cover cap, drain cock and other necessary parts are properly closed and then try the
above procedure (2) again.
(3) In opening the muffler part drain cock, it starts to suck the antifreeze solution. Let it suck
up to 5 L and, if it stops to suck, close the cock.
(4) Restart the engine and spread the solution throughout the pump in operating for 5
seconds. Set the water delivery lever to "water delivery" and antifreeze solution drains
from the vacuum pump exhaust pipe, return the water delivery lever to "discharge
water" and stop the engine.
(5) Open each drain cock to remove the antifreeze solution. (For longer dry running, do
not remove the antifreeze solution from cylinder cock. (→P.12 "For longer dry running")
(Notice)
1. In cold season, the vacuum pump might be freezing even in operating time. If such an
accident might possibly happen, remove the vacuum pump strainer cap and pour 10
ml of the antifreeze solution. Start the engine and pull down the water delivery lever to
spread the antifreeze solution inside of the vacuum pump as well.
3. How to deal with the accessories
(1) Dry the cloth hose and metal parts well after using.
(2) Pour hot water on the frozen cloth hose.
(22)
Antifreeze Solution
Blending Ratio
Freezing Point
Antifreeze
Water (%)
Solution (%)
10
90
20
80
30
70
40
60
50
50
°C
-4
-10
-17
-27
-39
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