Install Connecting Rod And Piston; Ring Compressor; Installing Piston Assembly; Rod And Cap Alignment - Columbia ParCar P4G Service Manual

Top
Barrel Face
(Plated)
ID Mark
Must Face
Top Of Piston
Oil Control
Rings
Figure 117 - Piston Ring Installation
4. Tighten compressor until piston cannot be turned in
compressor.
5. Then loosen compressor until piston can be turned
with slight resistance.
Top
Skirt
Projections
Figure 118 - Ring Compressor
DO NOT ATTEMPT TO INSTALL PISTON AND RING
ASSEMBLY WITHOUT RING COMPRESSOR.

Install Connecting Rod and Piston

1. Thoroughly clean and then oil cylinder bore.
2. Rotate crankshaft until crankpin journal is at bottom of
stroke.
Note: This permits complete entry of compressed rings, pis-
ton and rod assembly, when pushed into cylinder, Figure
119.
Notch Or
Arrow
Figure 119 - Installing Piston Assembly
3. Install piston with notch or arrow toward flywheel side
of engine, Figure 116, taking care not to damage
crankpin journal or connecting rod journal, when
installing.
Center
Expander
4. Clean and oil crankshaft crankpin.
5. Pull connecting rod against crankpin and install rod
cap with match marks aligned, Figure 120.
Figure 120 - Rod and Cap Alignment
6. Cap with dipper should snap on when assembled cor-
rectly. Install rod screws.
7. Torque connecting rods screws. Set Torque Wrench to
specifications listed in Table 8 page 7-47.
Note: Failure to use a torque wrench can result in loose
rods causing breakage, or deformed over tightened rods
causing scoring.
8. Rotate crankshaft two (2) revolutions to make sure
crankpin and rod are not binding during rotation.
9. Move connecting rod sideways to be sure rod slides
from side to side.
SPECIFICATION TABLES
Table 14 - Piston Ring Groove Rejects
Model
Series
9 & 13 H.P.
Engines
Table 15 - Piston Ring End Gap Rejection Size
Compression
Model
Series
9 & 13 H.P.
Engines
(.76 mm)
7-46
Compression Oil Control
Rings
.007"
(18 mm)
Oil
Rings
Ring
.030"
_
Ring
.007"
(18 mm)
Oil
Rails
.030"
(.76 mm)