C-4
IO-240 Series Engine Installation & Operation Manual
31 October 2011
Standard Practices
system must be overhauled. All engine baffles must be repaired or replaced and all
flexible baffle seals replaced.
Items such as spark plugs, alternator drive belts and air-conditioning drive belts are
replaced on condition.
C-2.4. Mandatory Overhaul Replacement Parts
In addition to the items listed in Section C-2.3 on page C-3, the following parts must be
discarded and replaced with new parts during engine overhaul.
C-2.5. Authorized Oversize/Undersize Parts
Replacement authorized oversize (AO) or authorized undersize (AU) parts must be used
with the proper AO and AU mating parts. Example: use 0.015 oversize piston and piston
rings with 0.015 oversize cylinder assembly.
C-3. Torque
Torque hardware with a currently calibrated torque wrench to Appendix B specifications.
• Bearings: connecting rod, crankshaft main
and thrust, needle, ball, and roller
• Bushings: rocker arm, connecting rod,
counter weight and crankshaft
counterweight blade
• Camshaft gear bolts
• Cold Start primer diverter valves
• Connecting rod bolts and nuts
• Connecting rod forging number 626119, P/
N’s 646320 and 646321 with beam width
less than 0.625 inches. Reference CSB96-
13.
• Counterweight pins, retaining plates and
snap rings
• Crankshaft alternator face gear bolts and
lock plates
• Crankshaft gear bolts
• Crankcase Through Bolts
• Cylinder deck stud nuts and through bolt
nuts
• Exhaust flange studs & nuts
• Exhaust valves
• Exhaust valve rotocoils
Replace intake valve rotocoils with solid valve
retainers on all E-series, O-470, IO-470, IO-
520, IO- 550, TSIO-520, TSIO-550, TSIOL-550
and GTSIO-520 engines.
• Fuel pump drive coupling P/N 631263 with P/N
653359 in accordance with Mandatory Service
Bulletin MSB 95-6 or latest revision
• Hydraulic valve lifters (tappets)
• Ignition system harness
• Intake and exhaust valve keepers
• Intake valves
• Inner and outer valve springs
• Magneto drive rubber bushings
• Pistons
• Piston pins
• Piston rings
• Rocker shafts
• Rockers shaft thrust washers
• Woodruff keys
Содержание IO-240-A
Страница 145: ......
Страница 146: ...www continentalmotors aero ...