Service Repair Manual
325C MOBILE HYD
Product: MOBILE HYD POWER UNIT
Model: 325C MOBILE HYD POWER UNIT MSG
Configuration: 325C Mobile Hydraulic Power Unit MSG00001-UP (MACHINE) POWERED BY 3126B Engine
Disassembly and Assembly
3126B Engines for Caterpillar Built Machines
Media Number -SENR9581-06
Publication Date -01/08/2018
Date Updated -17/08/2018
Crankshaft Main Bearings - Install
SMCS - 1203-012
Tool Part Number
Main Bearing Tool
Dial Indicator Group
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Note: Place clean engine oil on the crankshaft main bearings prior to assembly. Ensure that the
tabs on the back side of the crankshaft main bearings fit in the grooves of the crankshaft main
bearing caps and the cylinder block.
325C Mobile Hydraulic Power Unit MSG00001-UP (MACHINE) POWERED BY 31...
1. Use Tool (A) and install the upper halves of the crankshaft main bearings in the cylinder
block. Do not put oil on the back of the crankshaft main bearing.
2. Install the lower halves of the crankshaft main bearings in crankshaft main bearing caps (2).
Do not put oil on the back of the crankshaft main bearing.
Crankshaft main bearing caps should be installed with the part
number toward the right side of the engine. Crankshaft main bearing
caps are to be identified by stamped numbers 1 through 7 located on
the bottom surface. The thrust plate is used on the number 6
crankshaft main bearing only.
3. Place crankshaft main bearing caps (2) in position on the cylinder block. Place clean engine
oil or Molylube on the bolt threads and on the washer face. Install bolts (1).
4. Tighten bolts (1) to a torque of 54 ± 7 N·m (40 ± 5 lb ft). Tighte