Flails, Carburetoradjustment, Enginespeed

NGTE:Usecautionwhenremovingthe blade to avoid

contacting the weld bolts on the housing_

e When sharpening the blade, follow the original angle of grind as a guide. It is extremely important that each cutting edge receives an equal amount of grinding to prevent an unbalanced blade. An unbal- anced blade will cause excessive vibration when

rotating at high speeds and may cause damage to the unit

e The blade can be tested for balance by balancing it on a round shaft screwdriver or nail. Remove metal from the heavy side until it is balanced evenly. See figure 22_

Nail_\ _/\

FIGURE 22.

e When reassembling the blade, tighten to between 550 and 650 inch pounds, or lacking torque wrench, tighten securely

FLAILS

The flails, located inside the housing, may be reversed when they become dull It is suggested that this procedure be performed by your nearest Sears Service Department

CARBURETORADJUSTMENT

WARNING: IF ANY ADJUSTMENTS ARE MADE TO THE ENGINE WHILE THE

ENGINE IS RUNNING (E.G. CARBURE-

TOR)p KEEP CLEAR OF ALL MOVING PARTS. BE CAREFUL OF HEATED SUR-

FACES AND MUFFLER.

Minor carburetor adjustment may be required to com-

pensate for differences in fuel, temperature, altitude or load

NOTE: A DIRTY AIR CLEANER WILL CAUSE ENGINE TO RUN ROUGH. BE CERTAIN AIR CLEANER IS CLEAN AND ATTACHED TO THE CARBURETOR BEFORE ADJUSTING CARBURE- TOR. DO NOT MAKE UNNECESSARY ADJUST- MENTS FACTORY SETTINGS ARE SATISFACTO- RY FOR MOST APPLICATIONS AND CONDITIONS

Never attempt to change maximum engine speed It is pre-set at the factory and should be changed only by a qualified service technician who has the necessary equipment

The carburetor may need re-adjusting if engine lacks power or does not idle properly If adjustments are needed, proceed as follows

e Close needle valve (see figure 23) clockwise ((_) finger tight only. Forcing may cause damage. Then open 1-1/2 turns counterclockwise ( ,'_)

®Start engine and allow to warm for five minutes

e Close needle valve clockwise (,'-_) until engine starts to lose speed (lean mixture). Then slowly

open needle valve counterclockwise (,'_) until engine JUST BEGINS to run unevenly. This mix-

ture should be rich enough for best performance under load

O Rotate throttle counterclockwise (,'_) and hold against throttle stop.

If engine idles, no further adjustment is necessary. If engine idles too fast, turn idle speed adjusting

screw counterclockwise (_) until slower speed is obtained.

If engine dies, turn idle speed adjusting screw 1/4

turn clockwise (_) Place throttle control in FAST position and restart engine.

Move throttle control to IDLE position. If engine does not idle, repeat third step

O Test the engine by using the chipper-shredder If engine tends to stall or die out, it usually indicates that the mixture is slightly lean and it may be nec- essary to open ("_) the needle valve slightly to provide a richer mixture This richer mixture may cause a slight unevenness in idling.

Idle Speed Adjust _g Screw

Throttle

Idle Mixture

Needle Valve

(High Speed)

FIGURE 23.

ENGINESPEED

Your engine speed has been factory set Do not attempt to increase engine speed or it may result in personal injury If you believe the engine is running too fast or too slow, take your chipper-shredder to the

nearest SEARS Service Center for repair and adjust- ment