INDEX
1. SPECIFICATIONS ..........................................3
1.1 General specifications ....................................3
1.2 Dimensional drawings ....................................9
1.3 Wiring diagrams ........................................10
2. SERVICE INFORMATION....................................11
2.1 General safety .........................................11
2.2 Service rules ..........................................11
2.3 Serial number location ...................................11
2.4 Maintenance standards ..................................12
2.5 Torque values .........................................13
2.6 Special tools...........................................14
2.7 Troubleshooting ........................................15
2.8 Maintenance schedule ...................................19
3. MAINTENANCE ...........................................20
3.1 Oil...................................................20
3.2 Spark plug ............................................22
3.3 Air cleaner ............................................23
3.4 Throttle cable ..........................................24
3.5 Drive clutch cable (except H type) ..........................25
3.6 Rotostop cable .........................................25
3.7 Shift cable (except Q type) ................................27
3.8 Valve clearance ........................................28
3.9 carburetor.............................................29
3.10 Governor .............................................29
3.11 Fuel filter .............................................30
3.12 Blade ................................................30
3.13 Spark arrester (optional part) ..............................31
4. BLADE / ROTOSTOP .......................................32
4.1 Principe de fonctionnement du rotostop .....................32
4.2 Blade brake clutch ......................................33
4.3 Inspection du rotostop ...................................36
4.4 Driven disc, drive disc ...................................37
4.5 Ball control assembly ....................................39
4.6 Blade sharpening .......................................40
5. ENGINE REMOVAL / INSTALLATION..........................41
5.1 Engine removal ........................................41
5.2 Engine installation ......................................43
6. AIR CLEANER / MUFFLER ..................................45
6.1 Air cleaner ............................................45
6.2 Muffler ...............................................46
7. RECOIL STARTER / FUEL TANK .............................47
7.1 Fuel tank .............................................47
7.2 Recoil starter ..........................................49
8. IGNITION COIL / CONTROL ARM / carburetor ..................52
8.1 Ignition coil / Engine stop switch ...........................52
8.2 Control assembly .......................................55
8.3 carburetor.............................................59
9. FLYWHEEL / STARTER MOTOR..............................61
9.1 Flywheel..............................................61
9.2 Starter motor / Charging coil ..............................62
10. CYLINDER HEAD / VALVES .................................66
10.1 Removal / Installation....................................66
10.2 Disassembly / Reassembly ...............................67
10.3 Inspection.............................................68
10.4 Valve guide replacement .................................69
10.5 Valve seat reconditioning.................................70
11. OIL PAN / DRIVE SHAFT / GOVERNOR ........................72
11.1 Oil pan ...............................................72
11.2 Drive shaft / Governor ...................................74
12. CRANKSHAFT / PISTON / CYLINDER .........................75
12.1 Disassembly / Reassembly ...............................75
12.2 Inspection.............................................78
13. FRONT WHEEL / REAR WHEEL ..............................82
13.1 Front wheel ...........................................82
13.2 Rear wheel............................................84
14. REAR DRIVE SYSTEM......................................86
14.1 Transmission/Hydrostatic transmission (HRD535/K1/K2
HRD536/K1/K2) ........................................86
14.2 Transmission/Hydrostatic transmission (HRD535K1 TME) .......91
14.3 Transmission/Hydrostatic transmission (HRA536) .............93
14.4 Rear roller ...........................................101
15. HANDLE / CONTROL LEVERS ..............................105
15.1 Upper handle .........................................105
15.2 Lower handle .........................................108
15.3 Control lever..........................................109
15.4 Wire / Harness routing ..................................111
16. CONTROL BOX ..........................................114
16.1 Control box...........................................114
16.2 Combination switch ....................................115
16.3 Battery ..............................................115
16.4 Regulator / Rectifier ....................................117
17. DISCHARGE GUARD / GRASS BAG .........................118
17.1 Discharge guard.......................................118
17.2 Grass bag ...........................................119
SAFETY INSTRUCTIONS
Pay attention to these symbols and their meaning:
Indicates a high risk of severe personal injury or death if instructions are not
followed.
CAUTION:
•
Indicates a possibility of personal injury or equipment damage if instructions are not
followed.
-2-
HRA536 - HRD535 - HRD536
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