Komatsu SK714-5, SK815-5 Skid-Steer Loader Service Manual

Table of Contents

10. STRUCTURE AND FUNCTION…………………………………………………………………………… 10-1
20. TESTING AND ADJUSTING ………………………………………………………………………………. 20-1
30. REMOVAL AND INSTALLATION……………………………………………………………………….. 30-1
40. MAINTENANCE STANDARD……………………………………………………………………………… 40-1
90. OTHER……………………………………………………………………………………………………….90-1

This SK714-5, SK815-5 shop manual is 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.

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.

STRUCTURE AND FUNCTION
This section explains the structure and function of each component. It serves not only to give an understanding
of the structure, but also serves as reference material for troubleshooting.

TESTING AND ADJUSTMENTS
This sections explains checks to be made before and after performing repairs, as well as adjustments to be made at completion of the checks and repairs.
Troubleshooting charts correlating Problems to Causes are also included in this section.

REMOVAL AND INSTALLATION
This section explains the order to follow when removing, installing, disassembling or assembling each component, as well as precautions to be taken for these operations.

STANDARD MAINTENANCE
This section gives the judgement standards when inspecting disassembled parts

FLUSHING RELIEF VALVE

When the oil is sent under pressure to the A port, the oil that activated the motor returns to the pump through the B port.
The pressurised oil sent to the A port is also introduced into the chamber C. It now pushes the selector valve (1) to the right ( ). This opens communication between the B port and the oil gallery D, which is connected to the overpressure limitation valve (2).
If the pressure present at port B exceeds the calibration value of the overpressure limitation valve (2), this valve will open and discharge the excess oil into the reduction gears.