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HOSE AS 3967624 - Caterpillar

3967624 HOSE AS Caterpillar parts HOSE
Alternative (cross code) number:
Caterpillar 3967624 HOSE AS

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Piston Height
Illustration 2 g00891532
Quadram piston
There are two different designs for the crown of the piston. One design is the Quadram piston. There is only one grade of piston for the replacement of a Quadram piston.Grade of piston for service ... LHeight of a Quadram piston above the top face of the cylinder block ... 0.14 to 0.36 mm (0.005 to 0.014 inch)
Illustration 3 g00891548
Fastram piston
The other style of piston is the Fastram piston. The piston height above the top face of the cylinder block is controlled by different grades of height of the piston. Identification of the height grade is by the letter that is stamped on the top of each piston. The height grade can be checked by measuring from the center of the piston pin to the top of the piston. The difference between each grade of height is 0.045 mm (0.0018 inch). Table 1 provides the specifications for the grade of height for a Fastram piston.
Table 1
Height Grades for the Piston
Letter on top of Piston Height Dimension Latest Equivalent Grade
A(1) 70.334 mm (2.7690 inch) G
B(1) 70.289 mm (2.7673 inch) H
C(1) 70.244 mm (2.7655 inch) J
D(1) 70.199 mm (2.7637 inch) K
E(1) 70.154 mm (2.7620 inch) L
F 70.391 mm (2.7713 inch) -
G 70.345 mm (2.7695 inch) -
H 70.299 mm (2.7677 inch) -
J 70.253 mm (2.7659 inch) -
K 70.207 mm (2.7640 inch) -
L 70.161 mm (2.7622 inch) -
(1) Earlier enginesHeight of a Fastram piston above the top face of the cylinder block ... 0.38 to 0.50 mm (0.015 to 0.020 inch)Type 2 Engines and 7BJ Engines
Note: For a complete description of Type 1 and Type 2 engines, refer to the Specifications Module, "Engine Design" for more information.
Illustration 4 g00500921Note: The word "Front" or an arrow which is marked on the piston crown must be toward the front of the engine. If the piston crown is not marked, put the narrowest side of the piston crater toward the side of the engine with the fuel injection pump. The shortest distance between the edge of the piston crater and the edge of the piston is the narrowest side of the piston crater.Note: Be sure that the ring end gaps of all the piston rings have 120 degrees spacing from each other.Note: Refer to Systems Operation, "General Information" for the location of the serial number.Turbocharged Engines
(1) Top piston ring Shape of groove in piston for top ring ... TaperShape of top ring ... TaperClearance between the ends of the top ring in a cylinder liner without any wear ... 0.28 to 0.63 mm (.011 to .025 inch)Note: Install the word "TOP" toward the top of the piston. New top rings have a red identification mark which must be on the left of the ring gap when the intermediate ring is installed on an upright piston. (2) Intermediate ring Width of groove in piston for intermediate ring ... 2.56 to 2.58 mm (0.101 to 0.102 inch)Thickness of intermediate ring ... 2.48 to 2.49 mm (0.097

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