Wisconsin VH4D Dokumentacja Pobierz pdf (Strona 19)

NEON LAMP TIMING

The engine should be timed to the 23

advanced

position at not less than 2000 R.P.M.

The timing should be checked with a neon lamp connected

in series with No. 1 spark plug. Chalk or paint the end of the

"X" marked vane on Ihe flywheel, white. Then with the

engine operating at 2000 R.P.M. or over, allow the flash

from the neon lamp to illuminate the whitened vane. At the

time of the flash, the leading edge of the vane should line

up with the lower half of the running spark advance

timing hole on the flywheel shroud, see Fig. 13. If it does

not, the advance arm clamp screw should be loosened,

and the distributor body turned slightly clockwise or

counterclockwise, as required, until the white flywheel vane

matches up with the lower half of the advance timing hole.

Be sure advance arm clamp screw is then carefully

tightened. If the engine is running below 2000 R.P.M. when

timing, the automatic advance in the distributor will not be

fully advanced and the inaccurate timing may cause serious

damage to the engine when operating at high speeds. Mount

flywheel screen if removed - use slotted opening without

removing screen for running spark advance check only.

POINT TYPE IGNITION DISTRIBUTOR

The distributor breaker point gap should be .018 to .022

inches. To readjust breaker point gap, turn engine over by

means of the starting crank until the distributor breaker arm

rubbing block is on a high point of the cam. Loosen the

stationary contact locknut and screw fixed contact, in or

out, until correct gap is obtained. Tighten locknut and re-

check gap.

SOLID STATE IGNITION DISTRIBUTORS

Many Wisconsin engines are now being equipped with a solid

state ignition distributor. Detailed troubleshooting, repair and

parts information can be found in the rear section of this

manual.

CHARGING SYSTEM

Engines can be equipped with a 10 amp, 25 amp, or 30 amp

flywheel alternator system or a 37 amp belt driven alterna.

tor. Instructions are located in the rear of this manual.

RESTORING COMPRESSION

In a new engine or one which has been out of operation for

some time, oil may have drained off the elyinders so that

compression will be weak, causing difficulty in starting. To

remedy this condition, remove the spark plugs and pour about

a fluid ounce of crankcase oil through the spark plug hole into

each cylinder. Turn engine over several times with the hand

crank to distribute oil over the cylinder wails. Assemble spark

plugs and compression should be satisfactory.

SET GAP

Fig. 16

SPARK PLUGS, Fig. 16

Incorrect gap, fouled

or worn spark plug electrodes,

will have an adverse affect on engine operation. Re-

move spark plugs periodically, clean, regap or replace

if necessary. Thread size is 18 ram.

Spark plug gap - 0.030 of an inch.

Replacement plugs must be of the correct heat range,

like Champion No. D-16J, AC No. C86 commercial.

Tighten spark plugs, 25 to 30 {oat pounds torque.

HIGH TEMPERATURE SAFETY SWITCH

As a safety precaution against overheating, engines

can be equipped with a high temperature switch

mounted to the cylinder head at the No. 4 spark plug.

When cylinder head temperature becomes critically

high, the safety switch will automatically stop the en-

gine by shorting out the ignition system. A waiting

period of about 10 minutes will be required before the

switch has cooled off sufficiently to re-start the en-

gine. An overheated engine will score the cylinder

walls, burn out connecting rod and crankshaft bear-

ings, also warp pistons and valves. The cause of the

overheating condition will have to be remedied before

the engine is re-started. See Engine Overheats para-

graph in Troubles, Causes and Remedies section.

Service Kit is available - see parts list section.

KEEP ENGINE CLEAN -PREVENT OVERHEATING

(Agricultural and Industrial Engines)

This engine is cooled by blasts of air which must be

allowed to circulate all around the cylinders and cyl-

inder heads to properly cool the engine and thereby

keep it in good running condition. If dust, dirt or

chaff is allowed to collect in the cylinder shrouding

or in the V between the cylinders, it will retard the

flow of air and cause the engine to overheat. Keep

flywheel screen and rotating screen clean, so as not

to restrict the intake of cooling air.

With reference to Fig. 17; follow the cleaning and

maintenance instructions pointed out, to obtain

trouble fre~ and satisfactory engine performance.

1. Remove these covers frequently and clean out all

dust, dirt and chaff. Be sure to replace covers.

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Wisconsin VH4D Dokumentacja Strona 19

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