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Unformatted text preview: transformer. 8 Using Blade-Buster tool, remove flywheel
fastener. 10 Using pulling tool, remove flywheel. Note
the keyed and tapered. 11 Remove muffler. 12 Disconnect throttle and governor linkages.
Draw the connection.
13 Remove the fuel system (carburetor). How
does the fuel get delivered to the combustion
chamber? Faculty of Engineering & Applied Science
Memorial University of Newfoundland ENGI 1030 Lawnmower Disassembly/Assembly 14 Remove the kill switch/engine brake.
15 Turn lawnmower on its side.
16 Using Blade-Buster tool, remove blade. Note
how it is connected to the crankshaft.
17 Remove engine from lawnmower chassis. 18 Drain engine oil into a pan by opening drain
plug. Set lawnmower chassis aside. 19 Remove crankcase cover.
20 Remove oil pump. How does the oil travel in
the camshaft to lubricate driveshaft? 21 Look for timing marks on camshaft and
crankshaft. Remove camshaft.
22 Remove lifters/tappets. What do these do? 23 Disconnect connecting rod from crankshaft. 24 Push connecting rod to remove piston and
connecting rod. 25 Remove crankshaft. Notice alignment marks.
26 Notice pressure relief valve. What is it for?
How does the governor work? Faculty of Engineering & Applied Science
Memorial University of Newfoundland ENGI 1030 Lawnmower Disassembly/Assembly Assembly Instructions
1 Using ring compression tool, replace piston
and crankshaft. Take care not to damage the
piston face. 2 Insert the crankshaft. You may have to move
the connecting rod out of the way. 3 Using the alignment marks, refasten the
connecting rod to the crankshaft. 4 Replace the lifters/tappets. 5 Replace the camshaft and line up the timing
marks. 6 Replace the oil pump. 7 Replace the crankcase cover. Be careful to
align the governor gear. 8 Re-mount the engine on the lawnmower
chassis. 9 Replace the engine oil. 10 Replace the blade. 11 Replace the kill switch/engine brake. 12 Replace the carburetor. Faculty of Engineering & Applied Science
Memorial University of Newfoundland ENGI 1030 Lawnmower Disassembly/Assembly
13 Replace fuel/governor linkages. Use your
14 Replace the muffler. 15 Replace the flywheel. Depress the kill switch
to seat the flywheel completely. Do not
forget the key and spacer.
16 Replace and tighten flywheel fastener.
17 Replace transformer (Follow
recommendation to set gap for transformer).
18 Replace cylinder head. Follow
recommendations for bolt torque. 19 Replace engine shroud. 20 Replace air filter/intake. 21 Replace fuel tank. Reconnect fuel hose.
Replace clamp(s). 22 Replace starter assembly. 23 Replace spark plug. Reconnect spark plug
wire. Clean your tools and work area. Faculty of Engineering & Applied Science
Memorial University of Newfoundland ENGI 1030 Lawnmower Disassembly/Assembly NOTES Faculty of Engineering & Applied Science
Memorial University of Newfoundland...
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This document was uploaded on 02/28/2014 for the course ENG 1030 at Memorial University.
- Fall '11