Lycoming SERVICE TABLE OF LIMITS AND TORQUE VALUE RECOMMENDATIONS(30)

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on of Service Instruction No. 1238 for assembly procedure. 2 1/16-12 Propeller Shaft Lock Nut 7/16-20 Fuel Injector Nozzles (In
Induction Housing) 3/4-16 Compressor Drive Pulley Nut
Torque Limits
2.255 -2.256
300 in. lbs. 15 in. lbs. 50 in. lbs.
420 in. lbs. 450 in. lbs. 474 in. lbs.
85 in. lbs. 30 in. lbs. 2 in. lbs. 100 in. lbs.
300 in. lbs. 240 in. lbs. 720 in. lbs. 300 in. lbs. 300 in. lbs. 45 in. lbs.
1/4 In. Drilled Hex Nut With Safety Wire Torque In. Lbs.
75
75
Torque In. Lbs 40-60
1000 FT. LBS.
210 in. lbs. 240 in. lbs.
SSP1776
2-21
SERVICE TABLE OF LIMITS
PART II INTEGRAL ACCESSORY DRIVE ENGINES
SECTIONV SPECIALTORQUEREQUIREMENTS
Ref. Ref.
Thread Chart Size Nomenclature Torque Limits
New Old
926 861 AZ 5/8-18  Starter Drive Shaft Gear Nut 900 in. lbs.
927 863 AQ-AZ 1/4  Bolts -Crankshaft Gear 96 -120 in. lbs.
928 AQ-AZ 3/8-16  Cylinder Hold Down Studs
(CrankcaseDriving Torque) 100 in. lbs.

1/2-13  Cylinder Hold Down Studs (CrankcaseDriving Torque) 250 in. lbs.
929 858 AQ-AZ 3/8  CylinderHold Down Nuts 300 in. lbs.
1/2
CylinderHold Down Nuts  600 in. lbs.
Cylinder Hold Down Nut Tightening Procedure-See latest edition of Service Instruction No. 1029.
932 AQ-AZ 5/16-18  Exhaust Transitions -Studs
(DrivingTorque) 100 in. lbs.

3/8-16  Exhaust Transitions -Studs (DrivingTorque) 200 in. lbs.
N V SPRINGS
Length COMP. LOAD Avco ILyc. Wire At Comp. Mfr. Mfr. Serv. Chart Nomenclature Part NNo. Dia. Length Min. Max. Max.
LW-22798 136 lb. 133 lb. min. 76351 .177 1.610 in. 136 lb. 144 lb. 133 lb. min.
951 801 Auxiliary Valve Spring  1799 .148 1.48 in. 86 lb. 94 lb. 83 lb. min.
950 800 AQ-AZ  Outer ValveSpring 11798 .192 1.610 in. 144 lb.
AQ-AZ  LW-22799 76352 .142 1.48 in. 86 lb. 94 lb. 83 lb. min.
952 812 AQ-AZ  Oil Pressure Relief
Valve Spring
Avco Lycoming Identifcation
Part Numbers  Dye Free Lengthgth
68668 Purple  04
2.04
.054 1.30 in. 7.1 lb. 7.8 lb. 7.1 lb. min.
LW-11713 White 2.1
2.12 .059 1.44 in. 10.79 lb. 11.92 lb. 10.5 lb. min.
LW-11138 None 2.6
2.64 .051 1.44 in. 8.55 lb. 9.45 lb. 8.3 lb. min.
955 810 AQ-AZ Fuel Drain Check ValveSpring .047 .75 in. 5.50 lb. 6.50 lb. 5.35 lb. min. 956 807 AQ-AZ Oil Filter Relief
951 807 AQ-AZ Valve Spring .054 1.93 in. 3.05 lb. 3.55 lb. 3.00 lb. min. 957 AZ Shroud Tube Spring
.105 2.09 in. 14 lb. 16 lb. 13 lb. min.
958 817 AQ-AZ  PressurizingValveSpring .032 .455-.485 .65 lb. .75 lb. .63 lb. min.
959 816 AZ  Spring BetweenCrankshaft and Starter and Alternator Drive Gear .13 1.40 in. 48 lb. 52 lb. 46 lb. min.
960 AZ  Alternator Drive Coupling Spring .047 .83 in. 10 lb. 11lb. 9 lb. min.
　
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