Sumitomo SH160-3 Hydraulic Excavator Repair Manual

Sumitomo Excavator SH160-3
Manual Identification: WLST1605-00T, WCLA160A3
English
Sumitomo SH160-3 Hydraulic Excavator Repair Service Manual – 756 Pages
Parts Catalog – 415 Pages
Extract of the Sumitomo SH160-3 Manual
Negative Control Power Save Control
Model 3 negative control circuit
Control such that the discharge flow decreases as the negative control pressure increases
This reduces the flow for non-operation, so there is an energy-saving effect.
For non-operation
1) The oil discharged from the pump is boosted to the foot relief set pressure at the negative control metering valve downstream of the control valve and the negative control pressure rises.
2) The pump regulator section servo piston is moved in the direction that is left in the figure to decrease the flow.
However, the pump discharge pressure is the negative control pressure and pressure loss.
| 1 Foot relief valve
| 3 Negative control pressure
| 2 Negative control orifice
| 4 Servo assist pressure
The Sumitomo Manual Preface

The purpose of this Sumitomo Excavator manual is to assist dealers and repair serviceman in efficient repair and maintenance of their machinery. Carrying out the procedures as detailed, together with the use of any special tools needed.

Using the Sumitomo SH160-3 Manual

To make information easier to find, there is an index at the beginning of each section listing the various parts in that section. At the beginning of each part there is a table of contents which should also be used as a guide to locate information.

To assist with locating information, each section of the manual is preceded by a contents page listing the repair operations, Each instruction within an operating has a sequence number. To complete the operation in the minimum time is possible follow the manual guideline and repair instructions.

When parts have to be replaced in either the SH160-3 Hydraulic Excavator , it is essential that only genuine Sumitomo parts should be used. Special attention should be paid to the following points concerning repairs and the fitting of replacement parts and accessories.

Indexing

For convenience the manual is divided into section and parts, each page bearing a section and part number. The sections are subdivided into numbered operation. This simplifies cross referencing and enable the subject to be found easily.