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4250, 4505, 8605 AND LATER COMPLIANT MOWERS
All Lawn Boy Compliant Scamp Model Mowers
feature a Flywheel Brake system. It will stop the
blade from turning within
3 seconds after the
operator releases the bail. The engine also stops
at the same time.
Adjustments and
servicing of the Scamp self-
propelled mowers
are very
different from all
previous models of self-propelled mowers.
SAFETY WARNING:
Before any ad-
justments or repairs are attempted,
disconnect and remove spark plug to
prevent starting.
INSTALLING CONTROL ROD
1.
Place retainer clip on clutch arm with long side
of clip on the inside of clutch arm.
2. Align hole in clip with hole in arm and assem-
ble lower end of the control rod in hole.
3. Turn (swivel) long end of clip up and snap into
position on lower control rod as shown.
SCAMP MODELS
SERVICING AND ADJUSTMENTS
SELF-PROPELLED
SAFETY WARNING: The
lower self-
propel control rod must be assembled
to clutch arm as shown. If not the self-
propel mechanism will not return to
neutral when the control
lever is
released from the engaged position.
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Related Manuals for Toro 4250
Summary of Contents for Toro 4250
- Page 1 4250, 4505, 8605 AND LATER COMPLIANT MOWERS SCAMP MODELS SELF-PROPELLED SERVICING AND ADJUSTMENTS All Lawn Boy Compliant Scamp Model Mowers feature a Flywheel Brake system. It will stop the blade from turning within 3 seconds after the operator releases the bail. The engine also stops at the same time.
- Page 2 SCAMP MODELS SELF PROPELLED SERVICING AND ADJUSTMENTS With the control handle in “neutral” (free) posi- 6. Secure upper and lower control rods together with the clamp screw as shown. This screw should tion as shown. be tightened securely by hand. 5.
- Page 3 SCAMP MODELS SELF PROPELLED SERVICING AND ADJUSTMENTS DRIVE ROLLER ADJUSTMENT 1. With the control handle in “Neutral”, place both 2. Loosen bolt and nut located in drive roller gap of drive roller bracket. rear wheel height adjusters in #1 (lowest) cutting adjusting slot on each side position as shown.
- Page 4 SCAMP MODELS SELF-PROPELLED DRIVE BELT REPLACEMENT AND SERVICING V BELT REMOVAL OR REPLACEMENT SAFETY WARNING: To prevent start- ing engine, disconnect spark plug lead and remove spark plug. The “V” belt used on the utility self-propelled model mowers is a SPECIAL BELT. NOT USE SUBSTITUTE.
- Page 5 SCAMP MODELS SELF-PROPELLED DRIVE BELT REPLACEMENT AND SERVICING SAFETY WARNING: To prevent start- ing of engine, disconnect and remove spark plug prior to removing the engine. Remove three bolts securing engine to muffler plate and remove engine. NOTE: Do not remove muffler plate from housing when removing engine.
- Page 6 SCAMP MODELS SELF-PROPELLED DRIVE BELT REPLACEMENT AND SERVICING NOTE: After the belt has been re- moved, examine for broken, cracked or misaligned pulleys. The condition and the wear pattern of the belt will pro- vide clues for the above possibilities. Replace damaged or worn pulleys.
- Page 7 SCAMP MODELS SELF-PROPELLED DRIVE BELT REPLACEMENT AND SERVICING SAFETY WARNING IDLER PULLEYS TOP STRAND SAFETY WARNING: Incorrect drive belt installation may allow mower to operate in reverse direction causing injury to the operator or bystanders. Assemble drive belt as shown. DRIVE- BOTTOM STRAND...
- Page 8 SCAMP MODELS SELF-PROPELLED DRIVE BELT REPLACEMENT AND SERVICING INSTALL BELT AS SHOWN FOR PROPER PULLEY ROTATION 12. Reassemble the drive shaft into the bearing and slide it to the left as far as possible. Assemble the washer and drive roller on the drive shaft. 13.
- Page 9 complished by measuring the distance from the 2. Drive belt should be checked to insure that front edge on the height adjuster brackets to the proper tension exists in order to prevent premature 1/4” diameter gage holes located directly in front belt failure.
- Page 10 SCAMP MODELS SELF-PROPELLED DRIVE BELT REPLACEMENT AND SERVICING LUBRICATION 50 HOURS FOUR PLACES 1. DRIVE ROLLER BEARINGS-Disassemble rotating shaft cover from self-propel mechanism by removing four screws. Unscrew plug from end of each drive roller (Point “A”). Fill exposed cavity with LAWN-BOY “A”...
- Page 11 SCAMP BRAKE SERVICING AND REPAIR To service and repair the system, flywheel brake remove the shroud and tank assembly. (5 Phillips screws). Figure, Remove flywheel screen. screws). Figure Flywheel Removal/Installation It will be necessary to move the Flywheel Brake Arm away from the flywheel (pull back on control bail) to allow removal or installation of the flywheel.
- Page 12 SCAMP BRAKE SERVICING AND REPAIR Pull bail back against the handle to release the brake. Lift flywheel off. Flywheel Configurations 1983 Flywheels are much taller than previous models. As Fig. 5 shows, the visual difference is quite apparent. NOTE These new flywheels are not in- terchangeable with those of previous Lawn-Boy models.
- Page 13 SCAMP BRAKE SERVICING AND REPAIR To replace the brake arm, it will be necessary to STEP #6 disconnect the brake cable from the engine. Thoroughly clean the threads of the bolt and apply Lawn-Boy Screw Lock, part number 384848 to the Set the flywheel back...
- Page 14 SCAMP BRAKE SERVICING AND REPAIR STEP #2 Place a mark on the plunger at end of gauge. (See Fig. 11). STEP Remove the gauge. Figure 10 STEP #11 Turn jam nut against the adjusting nut and tighten. Figure not permit adjusting nut to turn. STEP #4 Use 1/2”...
- Page 15 SCAMP IGNITION CIRCUIT SWITCH TESTING AND REPLACEMENT Trouble shooting circuit switch. STEP #7 ‘-Using a drift punch and hammer, drive the switch STEP #1 body out of the bracket. (See Fig. 13). This will break Disconnect both leads from the C.D.
- Page 16 SCAMP BLADE AND BLADE HOUSING Figure Figure 3 Assemble muffler onto crankshaft. A special tool. crankshaft support gauge, part number 609968 is required to position the support correctly it doesn’t contact the crankshaft. Slide the gauge onto crankshaft with the thin wall of gauge inside of support.
- Page 17 SCAMP BLADE AND BLADE HOUSING The Blade and Hardware shown below are used on Before assembling collar on crankshaft, check to all Lawn-Boy Scamp models. be sure it did not get bent or distorted when being removed. If so, replace it. Do not use, because, it will cause vibration.
- Page 18 Zone Start Models Brake Cable Routing (console) Tie Wrap Locations Single Tie 2. Double Tie Retainer Cup Removal Hose and Cable Routing I. Primer Hose Brake Cable Brake Cable Retainer Clamp 4. Switch Cable Clamp Primer Assembly 19-60 SERVICE BULLETIN REFERENCES...
- Page 19 Wire Routing Diagram Zone (manual) Start Tubing SERVICE BULLETIN REFERENCES 19-61...
- Page 21 TROUBLE SHOOTING Engine Won’t Start or Hard Starting Ignition Circuit (“Kill”) Switch SCAMP (Zone) The following conditions are indications of Switch misadjustment failure. Engine misfires when in self-propelling mode Possible Cause Adjust Switch (See Pg. 54 Fig. 17). No fuel in tank. Fuel valve off.