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manual abstract
Place bolt on handlebar bracket through one of holes 1, 2, 3 or 4 in order of increasing height (See Figure 11). NOTE: On Professional models nuts and bolts replace pins. For storage, rotate handlebar forward and place pins through holes further up braces. 4.11 SPEED CONTROL BELL CRANK The speed control bell crank holds the speed selector rod in position after a speed has been set. The spring washers may become loose with normal wear. If the speed selector rod does not stay firmly in position, adjust the speed control bell crank. See Figure 12. To adjust: 1. Remove cover, fully compress the helical spring lockwashers with lock nut and then back lock nut off, one half turn. 2. If the speed selector rod is still too loose, tighten lock nut by small increments until it holds its position. Tightening the lock nut too much will not allow the speed selector rod to move at all. 3. Align notch in left hand side of cover with bolt and secure with knob. 4 - 25 4 1 2 3 5 6 4 1 2 3 5 6 1. Lock Nut 4. Speed Selector Rod 2. Helical Spring 5. Hair Pin Lockwashers 6. Swivel 3. Speed Control Bell Crank Figure 12 OM0300 1 2 34 5 6 2 3 4 5 4.12 FRICTION WHEEL ADJUSTMENT Early Models (Side Pull) 1. Cable Nuts 2. Drive Mount 4. Drive Disk 5. Friction Wheel Adjust rear cutting height levers to middle position. 3. Adjustment Screws 6. Battery Check to be sure there is slack in the friction wheel Figure 13 drive cable, if not readjust cable nuts. Set speed selector at slowest speed and loosen the two cap screws on drive mount. Hold lever securing drive cable down toward mower pan and adjust drive assembly to bring friction wheel to within 1/16" above drive disk. Tighten cap screws. Check for proper function of friction wheel and speed selector. Adjust cable nuts to remove slack. 4 - 26 SECTION 5 - ENGINE SECTION 5 - ENGINE ENGINE TROUBLESHOOTING The following troubleshooting chart is to be used to The troubleshooting key is generic and can be used for isolate engine problems and give possible causes and several types of engines. Use only those possible corrective action responses. causes and corrective actions that apply to the unit. TROUBLE POSSIBLE CAUSES (Refer to Key Below) CORRECTIVE ACTION Black Exhaust 1, 20, 22, 25, 29, 31, 32, 33 repair or replace Blue/White Exhaust 4, 20, 25, 31, 33, 34 repair or replace Difficult Starting 1, 5, 7, 8, 9, 10, 20, 21, 22, 29, 31, 32, 33 repair or replace Erratic Running 1, 7, 8, 9, 10, 20, 21, 23, 26, 29, 33, 59, 62 repair or replace Excessive Fuel Consumption 1, 20, 22, 23, 25, 39, 31, 32, 33 repair or replace High Oil Pressure 4, 41 repair or replace Knocking 22, 26, 29, 31, 33, 36, 46, 59 repair or replace Loss of Power or System 1, 8, 10, 20, 21, 22, 23, 25, 26, 31, 32, 33 repair or replace Low Cranking Power 2, 3, 4, 11 repair or replace Low Oil Pressure 4, 36, 37, 39 repair or replace Misfiring 10, 20, 25, 26, 28, 29, 32 repair or replace Overheating 1, 19, 25, repair or replace Poor Compression 25, 28, 29, 31, 32, 33, 34,59, repair or replace Starts and Stops 1, 6, 10, 62 repair or replace see electrical systems see engine service manual Vibration 20, 23, 25, 26, 29, 33, 45, 49 repair or replace Will Not Crank 2, 11, 45 charge battery or replace Will Not Start 1, 10, 62 repair or replace see electrical systems see engine service manual TROUBLESHOOTING KEY 1 Restriction in air cleaner 22 Incorrect grade of fuel 43 Faulty suction pipe 2 Bad electrical connection 23 Sticking throttle/restricted movement 44 Choked oil filter 3 Faulty starter motor 24 Exhaust pipe restriction 45 Bad solenoid switch 4 Incorrect grade of lubricating oil 25 Leaking cylinder head gasket 46 Incorrect piston height 5 Low cranking speed 26 Overheating 47 Damaged fan 6 Fuel tank empty 27 Cold running 48 Faulty engine mounting 7 Controls not in correct operation 28 Incorrect tappet adjustment 49 Incorrectly aligned flywheel and/or position flywheel housing 8 Blocked fuel feed line 29 Sticking valves 50 Faulty thermostat 9 Faulty fuel lift pump 30 Incorrect high pressure pipes 51 Restriction in water jacket 10 Choked fuel filter 31 Worn cylinder bores 52 Loose fan belt 11 Battery capacity low 32 Pitted valves and seats 53 Choked radiator 12 Air in fuel system 33 Broken, worn or sticking piston ring(s) 54 Faulty water pump 13 Faulty fuel injection pump 34 Worn valve stems and guides 55 Choked breather pipe 14 Faulty fuel injectors or incorrect 35 Restriction in air cleaner 56 Damaged valve stem oil deflector (if type fitted) 15 Incorrect use of cold start 36 Worn or damaged bearings 57 Coolant level too low equipment 16 Faulty cold start equipment 37 Insufficient oil in sump 58 Blocked sump strainer 17 Broken fuel injection pump drive 38 Bad/defective oil temperature switch 59 Broken valve spring 18 Incorrect fuel pump timing 39 Oil pump worn 60 Exhaust or vacuum pipe leak 19 Incorrect valve timing 40 Pressure relief valve sticking open 61 Bad or defective water temperature switch 20 Poor compression 41 Pressure re...
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