Piston and Rings
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C2.4 Tier 4 Final Engines for Caterpillar Built Machines
[M0067750]
C2.4 Tier 4 Final Engines for Caterpillar Built Machines
Crankshaft
C2.4 Tier 4 Final Engines for Caterpillar Built Machines
Gear Group (Front)
BASIC ENGINE
PISTON & ROD GP
C2.4 Tier 4 Final Engines for Caterpillar Built Machines
Piston and Rings
C2.4 Tier 4 Final Engines for Caterpillar Built Machines
Connecting Rod
1.1. Piston Pin Bore Inside Diameter
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Illustration 1 | g02803856 |
(1) Top Ring
(2) Intermediate Ring (3) Oil Control Ring (4) Piston Pin Snap Ring (5) Piston (6) Connecting Rod (7) Piston Pin |
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Illustration 2 | g03415019 |
Piston Ring Gap |
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Illustration 3 | g03415022 |
Clearance between piston ring and ring groove |
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Specifications for Top Piston Ring (Naturally Aspirated Engines) | |
Top ring gap (New) | 0.2 mm (0.0079 inch) to 0.35 mm (0.013 inch) |
Allowable Limit | |
Clearance from top ring to ring groove (New) | 0.050 mm (0.0020 inch) to 0.090 mm (0.0035 inch) |
Allowable Limit | |
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Specifications for Intermediate Piston Ring (Naturally Aspirated Engines) | |
Intermediate ring gap (New) | 0.30 mm (0.012 inch) to 0.45 mm (0.018 inch) |
Allowable Limit | |
Clearance from the intermediate ring to the ring groove (New) | |
Allowable Limit | |
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Specifications for Intermediate Piston Ring (Turbocharged Engines) | |
Intermediate ring gap (New) | 0.40 mm (0.016 inch) to 0.55 mm (0.021 inch) |
Allowable Limit | |
Clearance from the intermediate ring to the ring groove (New) | 0.0.0930 mm (0.00367 inch) to 0.128 mm (0.00503 inch) |
Allowable Limit | |
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Specifications for Oil Control Ring (Naturally Aspirated Engines) | |
Oil control ring gap (New) | 0.20 mm (0.0079 inch) to 0.40 mm (0.015 inch) |
Allowable Limit | |
Clearance between oil control ring to ring groove (New) | 0.030 mm (0.0012 inch) to 0.070 mm (0.0027 inch) |
Allowable Limit | |
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Specifications for Oil Control Ring (Turbocharged Engines) | |
Oil control ring gap (New) | 0.25 mm (0.0099 inch) to 0.45 mm (0.017 inch) |
Allowable Limit | |
Clearance between oil control ring to ring groove (New) | 0.020 mm (0.00079 inch) to 0.060 mm (0.0023 inch) |
Allowable Limit | |
Piston Pin Bore Inside Diameter
- Measure the piston pin bore I.D. in the horizontal and vertical directions with a cylinder gauge.
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Table 6 Inside diameter of piston pin bore (New) 25.000 (0.98426) to25.013 (0.98476) Allowable Limit 25.05 mm (0.9862 inch) - Measure the small end bushing inside diameter with an internal micrometer.
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Table 7 Inside diameter of small end bushing (New) 25.025 mm (0.98524 inch) to25.040 mm (0.98582 inch) Piston pin outside diameter (New) 25.004 mm (0.98441 inch) to 25.011 mm (0.98468 inch) - Calculate the oil clearance.
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Table 8 Oil clearance between piston pin outside diameter and small end bushing (New) 0.014 mm (0.00056 inch) to0.036 mm (0.0014 inch) Allowable limit 0.15 mm (0.0059 inch) - If the oil clearance is more than the allowable limit, replace the bushing.
- If the oil clearance stays more than the allowable limit, replace the piston pin also.
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Illustration 4 | g02811198 |
(8) Cylinder Gauge |
Information System:
C2.4 Tier 4 Final Engines for Caterpillar Built Machines
Crankshaft
C2.4 Tier 4 Final Engines for Caterpillar Built Machines
Camshaft
C2.4 Tier 4 Final Engines for Caterpillar Built Machines
Cylinder Head
Installation Procedure for the <NOBR>494-6811</NOBR> Cab Wiring Gp On Certain Hydraulic Excavators {1408, 7301}
Installation Procedure for the <NOBR>494-6809</NOBR> Chassis Wiring Gp On Certain Hydraulic Excavators {1408, 6129}
C2.4 Tier 4 Final Engines for Caterpillar Built Machines
Water Temperature Regulator - Remove and Install
Installation Procedure for the <NOBR>376-6329</NOBR> Front Lines Gp on Certain Hydraulic Excavators {5057}
Installation of the <NOBR>504-7558</NOBR> Coupler Control Ar on Certain Hydraulic Excavators {1408, 5057, 6129}
336D 2L and 340D 2L Excavators Machine Systems
Stick Bearings and Seals - Remove and Install
314F and 315F Excavators Machine System Specifications
Pilot Lines
Electric Starting Motor on Certain C7.1 Machine Engines {1453}
314F and 315F Excavators Machine System Specifications
Pilot Valve
C2.4 Tier 4 Final Engines for Caterpillar Built Machines
Gear Group (Front)
C2.4 Tier 4 Final Engines for Caterpillar Built Machines
Glow Plugs
330F MHPU Mobile Hydraulic Power Unit Machine System
Engine Performance - Test - Engine Speed
325F Excavator Machine Systems
Sprocket - Remove and Install
314F and 315F Excavators Machine System Specifications
Pilot Valve
314F and 315F Excavators Machine System Specifications
Boom Lines
GSH420, GSH425, GSH440, GSH520, GSH525, GSH455 and GSH555 Orange Peel Grapples
Bushings (Grapple) - Remove and Install
336D 2L and 340D 2L Excavators Machine Systems
Boom - Remove and Install
314F and 315F Excavators Machine System Specifications
Boom Cylinder Lines
314F and 315F Excavators Machine System Specifications
Swing Drive
314F and 315F Excavators Machine System Specifications
Boom Cylinder Lines
314F and 315F Excavators Machine System Specifications
Fuel Tank