ENGINE AR 2175470 - Caterpillar

Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 138-7575 Link Bracket 2
B 1P-1861 Retaining Ring Pliers 1
C 271-0504 Ring Expander 1
D 255-8897 Ring Compressor 1
E 327-8644 Ring Groove Gage-Top 1
327-8645 Ring Groove Gage-Second 1
327-8646 Ring Groove Gage-Oil 1
Illustration 1 g01229404
Use Tooling (E) for the ring grooves. Use Tooling (C) and install piston rings (7) onto piston (6). Install the top ring with the side that is marked UP 1 toward the top of the piston. Install the intermediate ring with the side that is marked UP 2 toward the top of the piston. The oil ring spring ends must be assembled 180 degrees from the ring end gap. After the rings have been installed, rotate the rings so that the end gaps are located 120 degrees from each other. Oil ring end gap must be in the pin bore plane.
Illustration 2 g01229403
Coat connecting rod (1) and wrist pin (5) with clean engine oil. Install connecting rod (1) into piston (6). Install wrist pin (5) into piston (6) and connecting rod (1). Use Tooling (B) in order to install retaining ring (4). Position retaining ring (4) with the opening toward the bottom of the piston.
Illustration 3 g01229379
Install O-ring seals (3) onto liner (2). Note: The liner o-rings are not compatible with petroleum-based products. Ensure that the liner is free of rust preventative and the liner o-rings are only lubricated with a soapy solution. Failure to do so will result in o-ring degradation and external coolant leaks.
Illustration 4 g01240871
Coat piston (6) and the piston rings with clean engine oil. Install Tooling (D) onto piston (6). Tighten Tooling (D) in order to compress the piston rings.
Illustration 5 g01240872
Coat the inside of liner (2) with clean engine oil. Attach Tooling (A) and a suitable lifting device onto the connecting rod. The weight of the connecting rod and the piston assembly is approximately 23 kg (50 lb). Install the connecting rod and the piston assembly into the bottom side of liner (2).
Illustration 6 g01520432
Remove Tooling (D) from liner (2). Note: Do not permit the piston to go past the top dead center position. If the piston goes past the top dead center position, the piston rings will lock into the cuff ring bore.End By:
Install the pistons, liners, and connecting rods. Refer to Disassembly and Assembly, "Pistons, Liners, and Connecting Rods - Install".