‘(977 FORM NO. 3310-919 MODEL: & UP OPERATOR'S MODEL: & UP MANUAL 21" GRASS MASTER " J FINGERTIP START AND KEY-LECTRIC® START The GRASS MASTER meets or exceeds the Outdoor Power Equipment Institute’s safety standards for rotary mowers; thus, Toto proudly displays the OPE[ safety seal. To assure maximum safety, optimum performance, and to gain knowledge of the mower, it is essential that you or any other operator of the mower read and understand the contents of this manual before the engine is started.
foreword The GRASS MASTER, the most innovative walk power mower, provides a new degree of mowing efficiency and convenience. If the mower is set up, operated and maintained properly, it will give long, dependable service. To familiarize yourself with safety, set-up, operating and maintenance instructions, read this manual thoroughly.
safety instructions The GRASS MASTER was tested and certified by an independent laboratory for compliance with the B71.1a 1974 specifications of the American National Standards institute. However, improper use or maintenance by the operator or owner of the mower can still result in injury, To reduce the potential for any injury, comply with the following safety instructions. BEFORE OPERATING 1, Operate the mower only after reading this manual.
safety instructions MAINTENANCE 21. Before the mower is serviced or adjusted, move traction control into DISENGAGE detente, stop the engine and disconnect high tension wire from spark plug. Keep the wire away from the plug to prevent the possibility of accidental starting. 22. To assure the mower is in safe operating condition, keep all nuts, bolts and screws tight.
specifications 10 Cubic Inch Tecumseh Engine: Model TNT 100, type 10049A is used on key start model and 10048A is used on recoil start model. Four cycle, air cooled engines have output of 4.5 ft lb of torque @ 2650 rpm. Fuel tank capacity is 1.3 quarts and crankcase capacity is 21 oz. Air cleaner is removable, serviceable polyurethane type, ELECTRIC model has auxiliary rope starter on top of engine, which is shielded by a cover, and other medals have easy-pull fingertip starter.
set-up instructions INSTALL LOWER HANDLE Tools Required: None 1. Push ends of lower handle together and install handle on pivot pins. Slide hair pin cotters through both pivot pins (Fig. 1). 2, Move handle latches backward until handle studs fit into hole at end of latches (Fig. 1). Note: {f latches do not stay engaged with handle studs, bend latches outward until engagement is maintained. TN adorer Installing Lower Han die Figure 1 INSTALL UPPER HANDLE AND CONTROL PANEL Tools Required: Screwdriver 1.
set-up instructions 4. Assure rear door handle is fully forward and locked in place {Fig. 4), REAR DOOR BAG . HANDLE Lt Rear Door Handle Locked Forward Figure 4 5. Slide guide hole in upper bag frame onto locating stud on mower housing (Fig. 4}; then set rear of bag frame onto lower handier. 6. Squeeze lockout lever until it disengages the bag catch {Fig. 4). Then move handle backward until lockout ever locks in notch at rear of latch {Fig. 5. The rear door in mower housing is open now.
before operating 4. Slowly pour approximately 21 ounces of oil into the filler neck. The engine uses any high quality detergent oil having the American Petroleum Institute — AP — “service classification” The recommended oil to use is: SAE 10W-30 or 10W-40. 8. Wipe end of dipstick and insert it into filler neck. Rotate cap clockwise 1/4 turn, Then remove the dipstick and check level of oil by reading the dipstick {Fig. B). If level of oil is low, add only enough oil to raise level to FULL mark on dipstick.
controls Throttle Control — The KEY-ELECTRIC model throttle control {Fig. 11} has two positions: SLOW and FAST. Move control between SLOW and FAST to operate engine at various speeds. Engine cannot be shut off by moving throttle control to SLOW: the ignition key must be turned OFF, By comparison, the recoil model throttle control (Fig. 10) has three positions: OFF, SLOW, and FAST. Move control between SLOW and FAST to operate engine at various speeds. To stop engine, move throttle control ta OFF.
operating instructions ADJUST HEIGHT-OF-CUT The height-of-cut is adjustable from approximately 1 to 3 inches, in 1/2 inch increments, and letters cast into the housing represent each graduated increment, a = clenches b = 1-1/2 Inches ¢ = inches d = clinches e = clinches 1 A Assure engine is not running before adjusting the height-of-cut because contact with the rotating blade will cause personal injury. 2. Place thumb against height-of-cut adjuster and fingers on outside of wheel (Fig. 13}, 3.
operating instructions be used for trimming. Bagging is most effective when engine is running at maximum speed and only about 1/3 of grass blade is being cut, If an excessive amount of grass is being cut off, the mower can plug and cause the engine to stall. If Lang grass must he cut, adjust mower to the highest height-of-cut; then cut the grass. Follow this by dowering the height-of-cut and cutting the grass again.
operating instructions = 5. A When bag must be emptied, move traction control into DISENGAGE detente, stop the engine and wait for all moving parts to stop. Move rear door handle forward until it locks in the safety catch. Then lift bag straight up so clippings stay in the bag rather than falling out the opening {Fig. 18). Removing Grass Bag Figure 18 IMPORTANT: If rear door of mower cannot he closed because grass clippings clog the discharge area, move rear door gently, back and forth.
operating instructions Note: |f desired, the grass bag may remain on the mower when mulching. A CAUTION Never open rear door when mulching because grass clippings and other debris will be discharged with enough force to cause personal injury. STARTING/STOPPING THE ENGINE 1. Assure high tension wire is pushed onto spark plug. 2. Move throttle control forward to FAST position and traction control into DISENGAGE detente {Fig. 21).
operating instructions 7. Pull high tension wire off spark plug to prevent possibility of accidental starting when mower is unattended or not used. AUXILIARY STARTING METHOD (KEY START MODEL} if battery — because of low charge — does not have enough power to activate the starter and start the engine, check electrical connections for proper contact. The engine can be started, however, although battery is not charged, by using the auxiliary starting pulley. 1.
operating instructions moderate water pressure, allow water and engine to run for approximately two minutes. However, do not spray water onto the starter motor on electric start model because damage could result. The action created by the rotating blade and water flushes accumulations of grass clippings from underside of mower housing. When grass is no longer discharged and color of discharged water is clear again, stop the engine. Pull high tension wire off spark plug after all parts stop moving.
maintenance SERVICING AIR CLEANER Tools Required: Solution of Liquid Soap Detergent and Water, Clean Rag and Engine Oil The air cleaner element must be cleaned after every 25 hours of engine operation if the engine is operated in clean air conditions, The element must be cleaned more frequently, however, when mower is operated in dusty or dirty conditions. 1. A Assure engine is not running, traction control is in DISENGAGE detente and high tension wire is pooled off spark plug. 2.
maintenance IMPORTANT: A cracked, fouled or dirty spark plug must be replaced. Do not sand blast, scrape or clean electrodes, using a wire brush, because grit may eventually release from the plug and fall into the cylinder. The result will likely be engine damage. 3., Set air gap between electrodes at 0.030 of an inch (Fig. 33). Install the correctly gaped spark plug with gasket seal and tighten plug to 16 ft lb.
maintenance INSPECTING CUTTER BLADE FOR DAMAGE Tools Required: None 1. Ah Assure engine is not running, traction control is in DISENGAGE detente and high tension wire is pulled off spark plug, 2. Ma Drain gasoline from fuel tank: refer to Draining Gasoline, page 17. 3. Tip mower on its left side (Fig. 36), which is its spark plug side, and allow it to remain tipped for a short time. Avoid rotating the blade when mower is tipped because starting problems may result. Mower on Left Side Figure 36 4.
maintenance 5. Using a file, sharpen cutting edge at both ends of the bide (Fig. 39). IMPORTANT: Sharpen top side of blade and maintain original cutting Angie to assure a sharp cutting edge (Fig. 39). The blade will remain balanced if same amount of material is removed from both cutting edges. SHARPEN AT ORIGINAL ANGLE END VIEW OF BLADE Sharpening Cutter Blade Figure 38 8.
maintenance 5. Move carburetor control arm to the left until it contacts grounding bracket {Fig. 41). Pull throttle cable slightly to remove any slack and tighten the cable clamp screw to lock the adjustment in place. CHECKING GEAR CASE Tools Required: None The gear case is filled with oil and sealed at the factory; therefore, regular maintenance is not necessary, However, check gear case periodically for oil leaks between sides of case and axis (Fig. 42).
maintenance [yt SCREW LOCKOUT ARM Recoil Traction Lockout Figure 44 8. With recoil handle pulled out 10 inches, move control cable, wire, and lockout arm to the left unit lockout arm stops {Fig. 44). 7. Allow starter rope to retract slowly, 8. Move the control cable, wire and arm 1/18 of an inch, or one coil of the cable to the right, Secure cable in place by tightening cable clamp screw {Fig. 44}, Note: This adjustment provides slight clearance between lockout arm and starter gear.
maintenance CHARGING BATTERY Tools Required: TOR Electra Charger A new battery is not charged, Therefore, if mower must be used immediately, charge the battery for 4 hours to provide enough energy to start engine several times, However, 48 hours of continuous charging are required for full charge. The 48 hour charge of a new battery is recommended for the initial charge, storage charge, and the spring charge.
maintenance 4. Clean dirt and chaff from outside of cylinder, cylinder head fins and blower housing. Also, remove grass clippings, dirt and grime from external parts of engine, shrouding and top of mower housing, 5. Clean underside of mower housing: refer to Cleaning Mower Housing, page 19. 8. Check condition of blade and blade cap screw: refer to Inspecting Cutter Blade For Damage, page 18, 7. Check and tighten all cap screws, bolts, screws, nuts and mating parts.
trouble shooting Problem Possible Causes Corrective Action Engine does not start, . Gas tank is empty. Throttle control not in FAST position, . Traction control not in DISENGAGE detente. . Air cleaner element is dirty. . Spark plug loose, gaped incorrectly or defective, . High tension wire loose or disconnected from spark plug. . Carburetor is flooded, . Blade bolt is loose. . Fill fuel tank with gasoline: refer to Fill Fuel Tank With Gasoline, page 8. .
trouble shooting Problem Possible Causes Corrective Action Engine skips at high speed. 1. Air gap between electrodes of spark plug is too close. 1. Set air gap at 0.030 of an inch, Engine overheats, 1. Cooling air flow is restricted, 2. Qil feel in crankcase is low, 3. Incorrect spark plug, 1. Remove any obstruction from slots in shroud, blower housing, air passages, and cooling fins on engine. 2. Add oil to crankcase: refer 10 Fill Crankcase With Oil, page 7. 3.
identification and ordering MODEL AND SERIAL NUMBERS The GRASS MASTER has two identification numbers: a model number and a serial number. The two numbers are stamped into a decal (Fig, 49} located on left side of the mower housing, near the step. In any correspondence concerning the mower, supply model and serial numbers to assure correct information and replacement parts are obtained. To order replacement parts from an Authorized TOR Service Dealer, supply the following information: 1.
maintenance record Date Hours Used Oit Change Air Cleaner Service Lubrication Sharpen Blade Winter Storage Spring Service Spark Plug vis s 27
The Toto Company promises 10 repair any TOR Product if def or workmanship. The following time periods from the date of purchase apply: Residential Product Residential Products Used Commercially The costs of parts and labor are included, but the customer pays the transportation costs. Just return any residential product to an Authorized TOR Service Eater ar TOR Distributor. Should you feel your TOR is defective and wish to rely on The Toto Promise, the following procedure is recommended: 1.