MITSUBISHI DIESEL ENGINE S4Q2-T Caterpillar


Others

Usage:

Disassembly and Reassembly of General Parts

Oil seals

When installing oil seals, observe the following.

Installation of Oil Seals to Housings

(a) Check the seal lip for scratches and damage, and be sure to position the lip correctly.

(b) Apply a small amount of grease to the periphery (housing contact surface) of the oil seal before installation.

(c) Use an oil seal driver that guides the seal lip and presses the seal periphery, as shown in the diagram on the right. Striking the oil seal directly with a hammer causes seal damage and results in oil leaks.


Oil seal driver

Installation of Oil Seals to Shafts

(a) Apply grease to the oil seal lip.
(b) Use an oil seal guide similar to the one shown in the diagram when installing an oil seal over the stepped portion, splines, threads or key grooves.


Oil seal guide

O-rings

Use an O-ring guide similar to the one shown in the diagram when installing an O-ring over the stepped portion, splines, threads or key grooves. Be sure to apply a small amount of grease to the O-ring before installation.


O-ring guide

Bearings


Bearing Driver

(1) When installing a bearing, be sure to push the inner or outer race that fits into the installation position. (When the inner race fits into the installation position, push the inner race into position. When the outer race fits into the installation position, push the outer race into position.) Be sure to use a bearing driver similar to the one shown in the diagram.

(2) Use of a press minimizes the impact on the bearing and ensures proper installation.


Using press for bearing installation

Lock Plates

Be sure to bend lock plates. The diagram on the right shows the methods of bending representative lock plates.


Bending lock plate

Split Pins and Spring Pins

Generally, new split pins should be installed whenever split pins are removed. Be sure to bend split pins. Be sure to check spring pins for secure installation.

Engine Inspection Record Sheet

1. Measurement of Cylinder Bore Diameter
2. Measurement of Clearance between Valve Stem and Valve Guide, and Valve Stem Diameter
3. Measurement of Valve Sinkage, Seat Width and Valve Margin
4. Measurement of Distortion of Cylinder Head Bottom Surfaces
5. Measurement of Oil Clearance of Connecting Rod Bearing
6. Measurement of Rocker Arm Inside Diameter and Shaft Diameter
7. Measurement of Piston Pin Bore Diameter and Piston Pin Diameter
8. Measurement of Valve Clearance
9. Measurement of Injection Pressure of Fuel Injection Nozzle
10. Measurement of Clearance between Camshaft Journal Bore Diameter and Camshaft Bushing
11. Measurement of Crankshaft End Play

Engine Inspection Record Sheet No. 1

Engine Inspection Record Sheet No. 2

Engine Inspection Record Sheet No. 3

Engine Inspection Record Sheet No. 4

Engine Inspection Record Sheet No. 5

Engine Inspection Record Sheet No. 6

Engine Inspection Record Sheet No. 7

Engine Inspection Record Sheet No. 8

Engine Inspection Record Sheet No. 9

Engine Inspection Record Sheet No. 10

Engine Inspection Record Sheet No. 11

Caterpillar Information System:

MITSUBISHI DIESEL ENGINE S4Q2-T Troubleshooting
MITSUBISHI DIESEL ENGINE S4Q2-T Inspection, Adjustment, Break-in Operation and Performance Tests
MITSUBISHI DIESEL ENGINE S4Q2-T Electrical System
MITSUBISHI DIESEL ENGINE S4Q2-T Inlet And Exhaust Systems
MITSUBISHI DIESEL ENGINE S4Q2-T Cooling System
MITSUBISHI DIESEL ENGINE S4Q2-T Lubrication System
MITSUBISHI DIESEL ENGINE S4Q2-T Fuel System
MITSUBISHI DIESEL ENGINE S4Q2-T Engine Main Parts
MITSUBISHI DIESEL ENGINE S4Q2-T Overhaul Instructions
MITSUBISHI DIESEL ENGINE S4Q2-T Basic And Special Tools
MITSUBISHI DIESEL ENGINE S4Q2-T Maintenance Standards
MITSUBISHI DIESEL ENGINE S4Q2-T General
OPERATING ENVIRONMENT-AND ITS EFFECT ON SR4 GENERATORS Operating Environment - And Its Effect On SR4 Generators
1990/01/08 Incorrect Wiring Of Start Switch To Starter Relay{1453,1408,1426}
1990/01/08 Seals Available To Service Impact Ripper Valve Assembly{5351,6317}
1990/01/08 Be Sure To Use Correct Ripper Lift And Tilt Cylinders On Tractors With Increased Hydraulic Pressures{5352,5356}
1990/01/08 Bearings Available For Repair Of Bulldozer Push Arm Connectors{6060,6061}
1990/01/08 Drag Brake And New Hand Control Used To Reduce Freespool Chattering In Winch{5163,5159}
1990/01/08 Erratic Transmission Shifting On Machines Equipped With Individual Clutch Modulation (ICM) Transmission Controls{3167}
1990/01/08 New Tilt Cylinder Head Permits Bucket To Correctly Dump At Any Height{5104}
1980/01/07 Three New Pressure Gauges Are Now Available {0651}
1980/01/07 Do Not Use 5B1161 Wire To Check Main Bearing And Connecting Rod Bearing Clearances; Use Plastigage {0653,1203,1219,1230}
1980/01/07 Fuel Heaters Are Now Available For Field Installation {1296}
1980/01/07 Different Steering Cylinder Hose Prevents Failures {4304}
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