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Model 12 Intek Horizontal OHV

Model 12 Intek Horizontal OHV. Crankcase Disassembly and Assembly Lab #7. Model 12 Intek Horizontal OHV. Stripping Engine to Bare Block Lab #7A. Required Tools. 7, 8, 10, 24 mm socket ½” breaker bar Ratchet wrench Extension 5/8” Combination wrench 1/8” Allen wrench

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Model 12 Intek Horizontal OHV

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  1. Model 12 Intek Horizontal OHV Crankcase Disassembly and Assembly Lab #7

  2. Model 12 Intek Horizontal OHV Stripping Engine to Bare Block Lab #7A

  3. Required Tools • 7, 8, 10, 24 mm socket • ½” breaker bar • Ratchet wrench • Extension • 5/8” Combination wrench • 1/8” Allen wrench • Inch pound torque wrench • Foot pound torque wrench • Standard screwdriver • Pliers • Strap wrench • Feeler gauge set • .010 long flat gauge (Or 2 microfiche cards) • Spark tester • Optional T-30 Torx bit

  4. Systematic Approach • Technicians need to take their time when disassembling an engine. This is not a race! • Listen for instruction when to remove the next piece. Do not work ahead! • Lay assemblies in order as they were removed. • Put fasteners with removed assemblies, or loosely back in bolt holes.

  5. Let’s Begin • Close fuel shut-off valve • Disconnect spark plug ignition lead from spark plug • Move throttle to stop position

  6. Remove Carburetor Per Lab#2 Instructions • Use written instructions

  7. Remove Fuel Tank Per Lab#4 Instructions • Use written instructions

  8. Remove Cylinder Head Assembly Per Lab#5 Instructions • Use written instructions

  9. Remove Flywheel and Ignition Armature Per Lab#6 Instructions • Use written instructions

  10. Bring Piston to TDC Compression • Valve tappets will be at the bottom of their travel

  11. Model 12 Intek Horizontal OHV Crankcase Disassembly and Assembly Lab #7B

  12. Bring Piston to TDC Compression • Valve tappets will be at the bottom of their travel

  13. Remove Crankcase Cover • Use 10 mm socket • Case cover gasket will probably be damaged during removal • Do not pry off cover – It will come off by hand

  14. Inspect Camshaft Gear • Timing marks of cam gear and crankshaft gear should align • Draw diagram

  15. Remove Cam Gear and Tappets • Tilt block • Remove cam gear by hand • Remove tappets by hand

  16. Remove Piston/Connecting Rod Assembly • Use 8 mm socket • Rod cap can only fit on one way • Long screw is closest to piston • Dipper held on by small screw • Piston and rod have orientation mark

  17. Remove Crankshaft • Pull out crankshaft by hand • Use caution not to scratch bearing surface in case

  18. Discuss Crankcase • Wipe up any remaining oil in case • Clean all gasket surfaces with gasket scrapper

  19. Reassembly • Technicians need to take their time when reassembling an engine. This is not a race! • Listen for instruction when to add the next piece. Do not work ahead! • Fasteners will need the proper torque values. • Special procedures will be explained.

  20. Install Crankshaft • Install crankshaft by hand into cylinder block • Be careful not to damage bearing • Position crankpin to 7 o-clock

  21. Install Piston Assembly • Use ring compressor • Coat piston assembly and cylinder bore with oil • Check orientation marks • DO NOT hammer or force piston assembly into block!

  22. Attach Rod to Crankshaft • Rod cap only goes on one way • Long screw goes closest to piston • Dipper attaches with short screw • Use 8 mm socket • Torque fasteners to 100 in. lbs • Rotate crankshaft and check for free movement

  23. Install Tappets and Cam Gear • Install tappets first • Align timing marks of cam gear and crankshaft gear

  24. Install Case Cover • New gasket? • Lubricate governor gears • Insure governor lever is laying flat • May need to rotate crankshaft for governor gears to mesh • Use 10 mm socket • Torque fasteners in sequence to 110 in. lbs

  25. Install Cylinder Head Assembly Per Lab#5 Instructions • Use written instructions

  26. Install Flywheel and Ignition Armature Per Lab#6 Instructions • Use written instructions

  27. Install Carburetor Per Lab#2 Instructions • Use written instructions

  28. Install Fuel Tank Per Lab#4 Instructions • Use written instructions

  29. Test Ignition System • Use spark tester 19368 • Look for a spark in the run position • Look for no spark in the stop position

  30. Install Spark Plug • Use 5/8" spark plug socket • Torque to 180 in. lbs • Attach ignition lead

  31. Success! • Do you have any extra parts? • Do you have any questions?

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