F12170 CONTACT SCREW W/LOCKWASHER Force
H0054H76D, H0060B76A, H0062H79M, H0064H78D, H0064H82H, H0082H76G, H0082H79K, H0091H84D, H0092284D, H0092B80G, H0092H79F, H0092H81H, H0092H81J, H0092H83K, H0092H84L, H0092S88A, H0092S91A, H0093S91A, H0094H81F, H0102H76C, H0102H78E, H0122H79E, H0152B78
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Compatible models:
H0054H76D
H0060B76A
H0062H79M
H0064H78D
H0064H82H
H0082H76G
H0082H79K
H0091H84D
H0092284D
H0092B80G
H0092H79F
H0092H81H
H0092H81J
H0092H83K
H0092H84L
H0092S88A
H0092S91A
H0093S91A
H0094H81F
H0102H76C
H0102H78E
H0122H79E
H0152B78D
H0152B83J
H0152C84K
H0152H79E
H0152H80F
H0152H81G
H0152S89A
H0202B80L
H0202B81M
H0202H79K
H0202H82N
H0252B83G
H0252H77B
H0252H78C
H0252H78D
H0254H75A
H0350H78L
H0351H76K
H0457H83P
H0503B83A
H0503H84B
H0507B85A
H0507C86A
H0507C87A
H0507F87B
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- IGNITION SYSTEM (88A-92B & SER. # E000001 THRU E034999) » F12170
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- IGNITION SYSTEM (88A-92B & SER. # E000001 THRU E034999) » F12170
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- MAGNETO 92H1J, 92B1J, 92H2J, 92B2J » F12170
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- IGNITION SYSTEM (88A-92B & SER. # E000001 THRU E034999) » F12170
- IGNITION SYSTEM (84A THRU 87A MODELS) » F12170
- IGNITION SYSTEM (84A THRU 87A MODELS) » F12170
- IGNITION SYSTEM (88A-92B & SER. # E000001 THRU E034999) » F12170
- IGNITION SYSTEM (84A THRU 87A MODELS) » F12170
- IGNITION SYSTEM (84A THRU 87A MODELS) » F12170
- IGNITION SYSTEM (84A THRU 87A MODELS) » F12170
- IGNITION SYSTEM (84A THRU 87A MODELS) » F12170
- IGNITION SYSTEM (88A-92B & SER. # E000001 THRU E034999) » F12170
- IGNITION SYSTEM (88A-92B & SER. # E000001 THRU E034999) » F12170
- IGNITION SYSTEM (84A THRU 87A MODELS) » F12170
- IGNITION SYSTEM (84A THRU 87A MODELS) » F12170
- MAGNETO » F12170
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- MAGNETO (MANUAL START MODELS) » F12170
- MAGNETO (MANUAL START MODELS) » F12170
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- MAGNETO (152H3J, 152B3J) » F12170
- MAGNETO (152H3J, 152B3J) » F12170
- MAGNETO (152H3J, 152B3J) » F12170
- MAGNETO (152H3J, 152B3J) » F12170
- IGNITION SYSTEM (88A-92B & SER. # E000001 THRU E034999) » F12170
- IGNITION SYSTEM (84A THRU 87A MODELS) » F12170
- IGNITION SYSTEM (84A THRU 87A MODELS) » F12170
- MAGNETO (MANUAL START MODELS) » F12170
- MAGNETO » F12170
- MAGNETO » F12170
- IGNITION SYSTEM (88A-92B & SER. # E000001 THRU E034999) » F12170
- IGNITION SYSTEM (84A THRU 87A MODELS) » F12170
- IGNITION SYSTEM (84A THRU 87A MODELS) » F12170
H0202B81M 1981
H0202H79K 1979
H0202H82N 1982
H0252B83G 1983,1984
- 252H3G 252B3G MAGNETO » F12170
- 252H3G 252B3G MAGNETO » F12170
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- MAGNETO » F12170
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- MAGNETO » F12170
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- MAGNETO » F12170
- ALTERNATOR AND ELECTRICAL COMPONENTS » F12170
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- ALTERNATOR AND ELECTRICAL COMPONENTS » F12170
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- ALTERNATOR AND ELECTRICAL COMPONENTS » F12170
- ALTERNATOR AND ELECTRICAL COMPONENTS » F12170
- ALTERNATOR AND ELECTRICAL COMPONENTS » F12170
Information:
Specifications
Table 1
    Inlet Valves     Exhaust Valves    
Valve Lash (Stopped Engine)     0.20 mm (0.008 inch)    
0.45 mm (0.018 inch)    
TC Compression Stroke     1 and 2     1 and 3    
TC Exhaust Stroke (1)     3 and 4     2 and 4    
Firing Order     1,3,4,2 (2)    
( 1 ) 360° from TC compression stroke
( 2 ) The No. 1 cylinder is at the front of the engine.
Table 2
TC Compression Stroke     Inlet Valves     Exhaust Valves    
Valve Lash    
0.20 mm (0.008 inch)    
0.45 mm (0.018 inch)    
Cylinders     1 and 2     1 and 3    
Table 3
TC Exhaust Stroke (3)     Inlet Valves     Exhaust Valve    
Valve Lash    
0.20 mm (0.008 inch)    
0.45 mm (0.018 inch)    
Cylinders     3 and 4     2 and 4    
( 3 ) Position for No. 1 cylinder
Table 4
Torque for Adjustment Locknut    
27 N m (20 lb ft)    Introduction
Refer to Specifications, "Engine Design" for the location of the cylinder valves.If the valve lash requires adjustment several times in a short period of time, excessive wear exists in a different part of the engine. Find the problem and make necessary repairs in order to prevent more damage to the engine.Not enough valve lash can be the cause of rapid wear of the camshaft and valve lifters. Not enough valve lash can indicate that the seats for the valves are worn.Valves become worn due to the following causes:
Fuel injection nozzles that operate incorrectly
Excessive dirt and oil are present on the filters for the inlet air.
Incorrect fuel settings on the fuel injection pump.
The load capacity of the engine is frequently exceeded.Too much valve lash can cause broken valve stems, springs, and spring retainers. Too much valve lash can be an indication of the following problems:
Worn camshaft and valve lifters
Worn rocker arms
Bent pushrods
Broken socket on the upper end of a pushrod
Loose adjustment screw for the valve lashIf the camshaft and valve lifters show rapid wear, look for fuel in the lubrication oil or dirty lubrication oil as a possible cause.Check Procedure
Valve Lash Check
An adjustment is NOT NECESSARY if the measurement of the valve lash is in the acceptable range. Check the valve lash while the engine is stopped. The temperature of the engine does not change the valve lash setting.
Table 5
   Inlet Valves    Exhaust Valves    
Valve Lash (Stopped Engine)    
0.20 mm (0.008 inch)    
0.45 mm (0.018 inch)    
TC Compression Stroke     1 and 2     1 and 3    
TC Exhaust Stroke (1)     3 and 4     2 and 4    
Firing Order     1,3,4,2 (2)    
( 1 ) 360° from TC compression stroke
( 2 ) The No. 1 cylinder is at the front of the engine.If the measurement is not within the acceptable clearance, adjustment is necessary.Adjustment Procedure
Valve Lash Adjustment
Note: The No. 1 cylinder is at the front of the engine.
Illustration 1 g00323903
Setting the valve lash (1) Adjustment screw (2) Feeler gauge
Table 1
    Inlet Valves     Exhaust Valves    
Valve Lash (Stopped Engine)     0.20 mm (0.008 inch)    
0.45 mm (0.018 inch)    
TC Compression Stroke     1 and 2     1 and 3    
TC Exhaust Stroke (1)     3 and 4     2 and 4    
Firing Order     1,3,4,2 (2)    
( 1 ) 360° from TC compression stroke
( 2 ) The No. 1 cylinder is at the front of the engine.
Table 2
TC Compression Stroke     Inlet Valves     Exhaust Valves    
Valve Lash    
0.20 mm (0.008 inch)    
0.45 mm (0.018 inch)    
Cylinders     1 and 2     1 and 3    
Table 3
TC Exhaust Stroke (3)     Inlet Valves     Exhaust Valve    
Valve Lash    
0.20 mm (0.008 inch)    
0.45 mm (0.018 inch)    
Cylinders     3 and 4     2 and 4    
( 3 ) Position for No. 1 cylinder
Table 4
Torque for Adjustment Locknut    
27 N m (20 lb ft)    Introduction
Refer to Specifications, "Engine Design" for the location of the cylinder valves.If the valve lash requires adjustment several times in a short period of time, excessive wear exists in a different part of the engine. Find the problem and make necessary repairs in order to prevent more damage to the engine.Not enough valve lash can be the cause of rapid wear of the camshaft and valve lifters. Not enough valve lash can indicate that the seats for the valves are worn.Valves become worn due to the following causes:
Fuel injection nozzles that operate incorrectly
Excessive dirt and oil are present on the filters for the inlet air.
Incorrect fuel settings on the fuel injection pump.
The load capacity of the engine is frequently exceeded.Too much valve lash can cause broken valve stems, springs, and spring retainers. Too much valve lash can be an indication of the following problems:
Worn camshaft and valve lifters
Worn rocker arms
Bent pushrods
Broken socket on the upper end of a pushrod
Loose adjustment screw for the valve lashIf the camshaft and valve lifters show rapid wear, look for fuel in the lubrication oil or dirty lubrication oil as a possible cause.Check Procedure
Valve Lash Check
An adjustment is NOT NECESSARY if the measurement of the valve lash is in the acceptable range. Check the valve lash while the engine is stopped. The temperature of the engine does not change the valve lash setting.
Table 5
   Inlet Valves    Exhaust Valves    
Valve Lash (Stopped Engine)    
0.20 mm (0.008 inch)    
0.45 mm (0.018 inch)    
TC Compression Stroke     1 and 2     1 and 3    
TC Exhaust Stroke (1)     3 and 4     2 and 4    
Firing Order     1,3,4,2 (2)    
( 1 ) 360° from TC compression stroke
( 2 ) The No. 1 cylinder is at the front of the engine.If the measurement is not within the acceptable clearance, adjustment is necessary.Adjustment Procedure
Valve Lash Adjustment
Note: The No. 1 cylinder is at the front of the engine.
Illustration 1 g00323903
Setting the valve lash (1) Adjustment screw (2) Feeler gauge
Parts contact Force:
F12349