Complete digital official shop manual contains service, maintenance, and troubleshooting information for the Kobelco Mini Excavators SK09SR, SK15SR, SK15MSR, SK16, SK17, SK16MSR, SK20SR. Diagnostic and repair procedures are covered in great detail to repair, maintain, rebuild, refurbish or restore your excavators like a professional mechanic in local service/repair workshop. This cost-effective quality manual is 100% complete and intact as should be without any missing pages. It is the same factory shop manual used by dealers that guaranteed to be fully functional to save your precious time.

This manual for Kobelco Hydraulic Excavators SK09SR, SK15SR, SK15MSR, SK16, SK17, SK16MSR, SK20SR is divided into different sections. Each section covers a specific component or system and, in addition to the standard service procedures, includes disassembling, inspecting, and assembling instructions. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. It is in the cross-platform PDF document format so that it works like a charm on all kinds of devices. You do not need to be skilled with a computer to use the manual.

MAKE: Kobelco
MODELS:
MINI EXCAVATORS

“SK09SR (S5PA0001E).pdf”
610 pages

“SK15MSR,SK16MSR (S5PF0002E).pdf”
616 pages

“SK15SR,SK20SR (S5PM0002E).pdf”
796

“SK16,SK17 (S5PF0004E).pdf”
630

EXCERPT:
2.2 OPERATION
1) Hydraulic Piston Pump
This pump that deliveries two equal volumes, is of a variable displacement piston pump with a single cylinder barrel.
Ten pistons (2) are incorporated in the cylinder barrel (1) whose end face gets in contact with the valve plate (3). The valve plate (3) has the suction port A and the delivery port B of P1 pump at outer side, and the suction port C and the delivery port D of P2 pump at inner side.
On the other hand, the swash plate ( 4) is fixed to the housing with a given inclination, and it is so designed that the pistons (2) rotate along this swash plate ( 4).
The rotation of the shaft (5) gives rotation to the cylinder barrel (1) resulting the reciprocating motion on the pistons (2) that are incorporated in the cylinder barrel (1), then the pistons (2) act as a pump with sucking and deliverying. At this time, the pistons getting in contact with the suction port A and the delivery port B of the valve plate act as the Pl pump, while the pistons getting in contact with the suction port C and the delivery port D act as the P2 pump.
In this way, the ten pistons (2) execute one stroke of suction and delivery at every one revolution of the cylinder barrel (1), then by means of rotating the shaft (5) continuously, the continuous pump operation of suction and delivery are realized.
Since the displacement volume of piston (2) stroke depends on the inclination of the swash plate (4), the deliverying oil flow rate can be changed by means of changing the inclination of the swash plate (4).
2) Deliverying Volume Control Function
The oscillating pin (6) is installed on the swash plate (4) which is installed to the housing so that its inclination angle can be charged. The pistons (2) in the cylinder barrel and the pistons (9) are so arranged on to the swash plate (4) that the spring force of the springs (7) is opposing to them; and the
delivery pressure of P1 and P2 pumps applies to the pistons (2), and that ofP3 pump applies to the pistons (9).
While the delivery pressure is less than the spring force being set on the springs (7), the inclination of the swash plate (4) is fixed at the maximum position with the springs (7).
...

1.3 OPERATION
(1) Hydraulic Piston Pump
Since the cylinder barrel of this piston pump is connected to the shaft with spline, it is rotated along with the shaft. The piston shoes which are incorporated in the cylinder barrel, follow to the rotation of the swash plate (slanted plate) resulting reciprocating movement that produces pumping action of suction and discharge depending upon the variation of the chamber volume.
This pump has even number of pistons so that the pump acts as two pumps with the same capacity in the one pump casing.
The valve plate, as shown in the Fig. 1-3, has two discharge grooves of outside (P1) and inside (P2). The every other piston chamber in the cylinder barrel is alternatively opened to either of discharge groove of outside (P1) or inside (P2), namely the same volume of discharge is independently exerted from P1 and P2 port. But suction groove is commonly used for both discharge grooves.
In this system, because of the even number of pistons, the same number of pistons is to be opened to the outside and inside of the valve plate. And all the pistons are identical with each other for the diameter, located on the same pitch circle, and sliding on the same swash plate.
Therefore, the discharge volume to outside (P1) and inside (P2) becomes equal.
Furthermore, because of only one swash plate, no difference is produced on the discharge volume to P1 and P2 eve.n though the slant angle of swash plate is varied due to variable control.