Komatsu WB91 Manual. This shop manual has been prepared as an aid to improve the quality of repairs by giving the operator an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to full effect at every opportunity.
Komatsu Service Manual.This shop manual mainly contains the necessary technical information for operations performed in a service workshop. The manual is divided into chapters on each main group of components; these chapters are further divided into the following sections.
Komatsu Repair Manual. The driving power for the engine (1) is transmitted through the flywheel to the converter (2). The converter (2) uses hydraulic oil to convert the torque transmitted by the engine (1) into driving power. The converter (2) transmits motion to the drive shaft of the transmission (3) and to the drive shaft of the hydraulic pump (4).
Komatsu User Manual. The transmission (3) has two hydraulically activat ed clutches that can be selected by an electrically controlled gear selector. It also has manual gear selection (four forward gears and four reverse gears).
The cylinder block (7) rotates together with the shaft (1) and the shoe (4) slides on the flat surface A. The swash plate (3) moves along the cylindrical surface B. The angle formed between the center line of the shaft (1) and the center line X of the swash plate (3) changes, thus modifying the axial position of the pistons in relation to the cylinder block. The angleis known as the swash plate angle.
When the center line X of the swash plate (3) maintains the angle in relation to the center line of the shaft (1), and hence also of the cylinder block (6), the flat surface A acts as a cam for the shoe (4). As the piston (5) rotates and slides inside the cylinder block (6), it therefore creates a difference between the volumes C and D which provokes intake and discharge of the oil in quantities equal to the difference between the volumes (D – C=delivery).
In other words, as the cylinder block (6) rotates, chamber D loses volume while the volume of chamber C is increased, thus provoking an intake of oil. (The figure indicates the state of the pump when the intake of chamber D and the delivery of chamber C have been completed).