REPAIR MANUAL - Wisconsin Motors

esult in injurious sludge formation. It is vitally important
therefore to maintain oil and crankcase
temperatures above 57°C (135°F.) as shown
the following chart:
Use the checklist which follows to get your engine
ready for winter. Then use the winter maintenance
schedule to keep it in peak operating condition
during the winter months.
REACTIONS WITHIN ENGINE CRANKCASE
TO TEMPERATURES DURING OPERATION
/ WARNING
F
250
°.
2oo’.
15o
°
.
loo’,
50"
32"
o
CLEAN
ENGINE
OPERATION
LIQUID CONDENSATION S=udg=no, Etching of Parts,
Ring and Valve Sticking and
Burning of Bearings.
666
SNOW - ICE
Sludge and Freezing of Oil Screens
and Pumps - Resulting in Burned
Bearings and Stripped Pump Gears.
c
176.6"
148.9"
121.1"
93.3"
65,5
°
37.7"
10"
0"
-17.8"
45.6"
When sludging conditions prevail, the oil should be
examined daily and changed as it may freeze, or clog
the inlet strainer and cause bearing or oil pump
failures.
High Altitude Operation--if engine is to be run
continuously at a high altitude (above 5000 ft.) the
pump calibration should be modified to maintain an
acceptable smoke level. Contact manufacturer for
recommendations.
Note: Some high altitude fuel delivery curve shaping
can be performed on some STANADYNE fuel injection
pumps in the field (see pg. 30).
High Temperature Operation--for every 5°C
(10°F.) above 29.4°C (85°F.) inlet air temperature--
a power loss of 1% results.
ENGINE PREPARATION FOR WINTER USE
CHECKLIST
Stop engine before checking battery terminals or electrical
connections. Sparks or flames near a battery
could cause an explosion or fire. Battery acid can cause
corrosive burns. Always wear eye protection. Use of
jumper cables or battery charging should be done only
as directed by manufacturers’ safety instructions.
Read and observe safety warnings on pages 1 and 2.
1. ELECTRICAL SYSTEM
A. Battery - replenish water and test for condition
and state of charge. Replace if required.
Wiring - check battery cables, connections and
other wiring. Be sure connections are clean
and tight and that cables and wiring insulation
are in good condition.
Alternator and regulator-run the engine and
check the ammeter to be sure the alternator is
charging and the regulator is functioning properly.
Check and adjust alternator belt tension.
2. COOLING SYSTEM
/ WARNING
If the coolant is hot or if the engine has been running,
loosen the pressure cap to the first stop and let the
pressure out o! the cooling system before removing the
radiator cap.
Read and observe safety warnings on pages 1 and 2.
A. Check radiator, hoses and engine for water
leaks. Tighten hose clamps, repair leaks and
install antifreeze to the level required for
winter protection.
More than 90% of the hard starting complaints
in cold weather are the direct result of inadequateattention
to preparation for winter use and proper
maintenar~ce. An engine not properly prepared requires
more cranking energy and time, which puts
a heavy load on batteries. So, invariably, batteries
run down and the engine is blamed for hard starting.
Putting your engine in proper condition and
keeping it that way pays big dividends by reducing
costly down time.
3. LUBRICATION SYSTEM
Add oil of the pro-
A. Drain oil and change filter.
per winter grade.
B. There are several different types and
manufacturers of transmissions and powertake-offs.
Caution should be used when
determining the proper seasonal grade lubricant
to assist in cold weather starting.
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