This service manual provides detailed specifications, maintenance standards, and step‑by‑step procedures for the Mitsubishi S4S and S6S diesel engines used in excavators and fork lifts. It includes safety cautions, inspection criteria, and torque specifications to ensure safe and reliable engine operation.
The manual is organized into groups covering safety, general maintenance, main engine parts, fuel, lubrication, cooling, inlet/exhaust, electrical systems, and performance testing, with inspection record sheets for critical dimensions such as camshaft and crankshaft measurements.
| Camshaft Journal Inside Diameter (S4S) | 53.94–53.96 mm |
|---|---|
| Camshaft Bore Diameter (S48) | 53.030–53.050 mm |
| Crankshaft End Play (Standard) | 0.100–0.264 mm (limit 0.300 mm) |
Keep flames away, store fuel and oil in a well‑ventilated area, keep the surrounding area clean, and use shatter‑proof lighting.
Pull out the starter‑switch key, turn off the battery switch, and post a “Do Not Operate” tag on the starter switch.
Camshaft journal clearance for the S4S model is 0.07 to 0.11 mm, with a limit of 0.15 mm.