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Komatsu Hydraulic PC03, PC05, PC07, PC09, PC10, PC12, PC15, PC18, PC20, PC25, PC27, PC30, PC35, PC40, PC45, PC50, PC55 Excavator Factory Service & Shop Manual

Komatsu PC03-05-07-09-10-12-15-18-20-25-27-30-35-40-45-50-55 Hydraulic Excavator

MKMTSPC0355OPEK.PDF
Price: $29.99 USD

Complete workshop & service manual with electrical wiring diagrams for Komatsu Hydraulic Excavator PC03-2, PC05-6, PC07-1, PC09-1, PC10-6, PC10-7, PC12R-8, PC15MR-1, PC15-2, PC15-3, PC15R-8, PC18MR-2, PC18MR-3, PC20-3, PC20MRX-1, PC20MR-2, PC20-6, PC20-7, PC20R-8, PC25-1, PC25R-8, PC27MRX-1, PC27MR-2, PC27MR-3, PC27R-8, PC30MRX-1, PC30MR-2, PC30-3, PC30MR-3, PC30-6, PC30-7, PC30R-8, PC35MRX-1, PC35MR-2, PC35MR-3, PC35R-8, PC40MRX-1, PC40MR-2, PC40-6, PC40-7, PC40R-8, PC45-1, PC45MRX-1, PC45MR-3, PC45R-8, PC50UU-1, PC50MR-2, PC50UU-2, PC55MR-3. It’s the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

This Komatsu Hydraulic Excavator PC03-2, PC05-6, PC07-1, PC09-1, PC10-6, PC10-7, PC12R-8, PC15MR-1, PC15-2, PC15-3, PC15R-8, PC18MR-2, PC18MR-3, PC20-3, PC20MRX-1, PC20MR-2, PC20-6, PC20-7, PC20R-8, PC25-1, PC25R-8, PC27MRX-1, PC27MR-2, PC27MR-3, PC27R-8, PC30MRX-1, PC30MR-2, PC30-3, PC30MR-3, PC30-6, PC30-7, PC30R-8, PC35MRX-1, PC35MR-2, PC35MR-3, PC35R-8, PC40MRX-1, PC40MR-2, PC40-6, PC40-7, PC40R-8, PC45-1, PC45MRX-1, PC45MR-3, PC45R-8, PC50UU-1, PC50MR-2, PC50UU-2, PC55MR-3 service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. 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. The printer-ready PDF documents work like a charm on all kinds of devices.

FILELIST (1.57 GB PDF):
EEPB000800 – Hydraulic Excavator PC05-6F Parts Book.pdf
SEAM020MB600 – Hydraulic Excavator PC05-6, PC10-6, PC15-2 Operation & Maintenance Manual.pdf
SEAM020P0700 – Hydraulic Excavator PC20-7 Operation & Maintenance Manual.pdf
SEAM020U0100 – Hydraulic Excavator PC50UU-1 Operation & Maintenance Manual.pdf
SEAM020U0101 – Hydraulic Excavator PC50UU-1 Operation & Maintenance Manual.pdf
SEAM005500 – Hydraulic Excavator PC50UU-2 Operation & Maintenance Manual.pdf
SEAM005503T – Hydraulic Excavator PC50UU-2 Operation & Maintenance Manual.pdf
SEAM006600 – Hydraulic Excavator PC25-1, PC30-7, PC40-7, PC45-1 Operation & Maintenance Manual.pdf
SEAM009502T – Hydraulic Excavator PC40-7 Operation & Maintenance Manual.pdf
SEAM015102T – Hydraulic Excavator PC12R-8, PC15R-8 Operation & Maintenance Manual.pdf
SEAM015203T – Hydraulic Excavator PC20R-8, PC25R-8, PC27R-8 Operation & Maintenance Manual.pdf
SEAM015301 – Hydraulic Excavator PC30R-8, PC35R-8, PC40R-8, PC45R-8 Operation & Maintenance Manual.pdf
SEAM015304T – Hydraulic Excavator PC35R-8, PC45R-8 Operation & Maintenance Manual.pdf
SEAM034800 – Hydraulic Excavator PC28UU-2 Operation & Maintenance Manual.pdf
SEAM035202T – Hydraulic Excavator PC20MRx-1Operation & Maintenance Manual.pdf
SEAM035203 – Hydraulic Excavator PC20MRx-1 Operation & Maintenance Manual.pdf
SEAM035305T – Hydraulic Excavator PC27MR-x1, PC30MR-x1, PC35MR-x1 Operation & Maintenance Manual.pdf
SEAM040601 – Hydraulic Excavator PC03-2 Operation & Maintenance Manual.pdf
SEAM043000 – Hydraulic Excavator PC40MRx-1, PC45MRx-1 Operation & Maintenance Manual.pdf
SEAM043006T – Hydraulic Excavator PC40MRx-1, PC45MRx-1 Operation & Maintenance Manual.pdf
SEAM044501T – Hydraulic Excavator GALEO PC09-1 Operation & Maintenance Manual.pdf
SEAM044502 – Hydraulic Excavator PC09-1 Operation & Maintenance Manual.pdf
SEAM044900T – Hydraulic Excavator PC15MRX-1 Operation & Maintenance Manual.pdf
SEAM055301T – Hydraulic Excavator GALEO PC40MR-2, PC50MR-2 Operation & Maintenance Manual.pdf
SEAM060100T – Hydraulic Excavator GALEO PC35MR-2 Operation & Maintenance Manual.pdf
SEBM020M0604 – Hydraulic Excavator PC05-6, PC07-1, PC10-6, PC15-2 Shop Manual.pdf
SEBM020P0703 – Hydraulic Excavator PC10-7, PC15-3, PC20-7 Shop Manual.pdf
SEBM020R0604 – Hydraulic Excavator PC20-6, PC30-6, PC40-6 Shop Manual.pdf
SEBM020S0707 – Hydraulic Excavator PC25-1, PC30-7, PC40-7, PC45-1 Shop Manual.pdf
SEBM020U0104 – Hydraulic Excavator PC50UU-1 Shop Manual.pdf
SEBM0225C01 – Hydraulic Excavator PC20-3, PC30-3 Shop Manual.pdf
SEBM000906 – Hydraulic Excavator PC50UU-2 Shop Manual.pdf
SEBM010801 – Hydraulic Excavator PC20R-8, PC25R-8, PC27R-8 Shop Manual.pdf
SEBM012603 – Hydraulic Excavator PC30R-8, PC35R-8, PC40R-8, PC45R-8 Shop Manual.pdf
SEBM012604 – Hydraulic Excavator PC30R-8, PC35R-8, PC40R-8, PC45R-8 Shop Manual.pdf
SEBM013103 – Hydraulic Excavator PC12R-8, PC15R-8 Shop Manual.pdf
SEBM016602 – Hydraulic Excavator PC20MRX-1 Shop Manual.pdf
SEBM016808 – Hydraulic PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1, PC45MRX-1 Shop Manual.pdf
SEBM019002 – Hydraulic Excavator PC15MR-1 Shop Manual.pdf
SEBM025000 – Hydraulic Excavator PC03-2 Shop Manual.pdf
SEBM026105 – Hydraulic Excavator PC09-1 Shop Manual.pdf
SEBM032411 – Hydraulic Excavator PC27MR-2, PC30MR-2, PC35MR-2, PC40MR-2, PC50MR-2 Shop Manual.pdf
SEBM037001 – Hydraulic Excavator PC20MR-2 Shop Manual.pdf
SEBM038404 – Hydraulic Excavator PC18MR-2 Shop Manual.pdf
SEN04063-07 – Hydraulic Excavator PC27MR-3, PC30MR-3, PC35MR-3 Shop Manual.pdf
SEN04306-04 – Hydraulic Excavator PC18MR-3 Shop Manual.pdf
SEN04597-06 – Hydraulic Excavator PC45MR-3, PC55MR-3 Shop Manual.pdf
TEN00052-01 – Hydraulic Excavator GALEO PC18MR-2 Operation & Maintenance Manual.pdf
TEN00054-03 – Hydraulic Excavator GALEO PC40MR-2, PC50MR-2 Operation & Maintenance Manual.pdf
TEN00062-04 – Hydraulic Excavator PC09-1 Operation & Maintenance Manual.pdf
TEN00099-01 – Hydraulic Excavator PC27MR-2, PC35MR-2 Operation & Maintenance Manual.pdf
TEN00101-02 – Hydraulic Excavator GALEO PC20MR-2 Operation & Maintenance Manual.pdf
TEN00115-00 – Hydraulic Excavator GALEO PC27ME-2, PC35MR-2 Operation & Maintenance Manual.pdf
TEN00115-01 – Hydraulic Excavator GALEO PC27MR-2, PC35MR-2 Operation & Maintenance Manual.pdf
TEN00193-00 – Hydraulic Excavator GALEO PC40MR-2, PC50MR-2 Operation & Maintenance Manual.pdf
TEN00194-00 – Hydraulic Excavator GALEO PC27MR-2, PC35MR-2 Operation & Maintenance Manual.pdf
TEN00284-03 – Hydraulic Excavator GALEO PC27MR-3, PC35MR-3 Operation & Maintenance Manual.pdf
TEN00292-03 – Hydraulic Excavator PC18MR-3 Operation & Maintenance Manual.pdf
TEN00306-03 – Hydraulic Excavator PC45MR-3, PC55MR-3 Operation & Maintenance Manual.pdf
TEN00378-03 – Hydraulic Excavator PC27MR-3, PC35MR-3 Operation & Maintenance Manual.pdf
TEN00390-03 – Hydraulic Excavator PC45MR-3, PC55MR-3 Operation & Maintenance Manual.pdf
TEN00507-01 – Hydraulic Excavator PC27MR-3, PC35MR-3 Operation & Maintenance Manual.pdf
TEN00508-01 – Hydraulic Excavator PC45MR-3, PC55MR-3 Operation & Maintenance Manual.pdf
TEN00514-01 – Hydraulic Excavator PC18MR-3 Operation & Maintenance Manual.pdf
TEN00549-00 – Hydraulic Excavator PC18MR-3 Operation & Maintenance Manual.pdf
TEN00552-01 – Hydraulic Excavator PC27MR-3, PC35MR-3 Operation & Maintenance Manual.pdf
TEN00555-00 – Hydraulic Excavator PC09-1 Operation & Maintenance Manual.pdf
WEAM000101 – Hydraulic Excavator PC20R-8, PC27R-8 Operation & Maintenance Manual.pdf
WEAM002702 – Hydraulic Excavator PC12R-8, PC12R-8 HS, PC15R-8, PC15R-8 HS Operation & Maintenance Manual.pdf
WEAM003000 – Hydraulic Excavator PC15R-8 Operation & Maintenance Manual.pdf
WEAM003001 – Hydraulic Excavator PC15R-8 Deluxe Operation & Maintenance Manual.pdf
WEAM003100 – Hydraulic Excavator PC27R-8 Operation & Maintenance Manual.pdf
WEAM003102 – Hydraulic Excavator PC27R-8 Deluxe Operation & Maintenance Manual.pdf
WEAM003200 – Hydraulic Excavator PC35R-8, PC45R-8 Operation & Maintenance Manual.pdf
WEAM003202 – Hydraulic Excavator PC35R-8, PC45R-8 Deluxe Operation & Maintenance Manual.pdf
WEAM006600 – Hydraulic Excavator PC30MR-2, PC35MR-2 Operation & Maintenance Manual.pdf
WEAM007000 – Hydraulic Excavator GALEO PC20MR-2 Operation & Maintenance Manual.pdf
WEAM007700 – Hydraulic Excavator GALEO PC14R-2 Operation & Maintenance Manual.pdf
WEAM007800 – Hydraulic Excavator GALEO PC16R-2 Operation & Maintenance Manual.pdf
WEBM000100 – Hydraulic Excavator PC12R-8, PC15R-8 Shop Manual.pdf
WEBM000101 – Hydraulic Excavator PC12R-8, PC15R-8 Shop Manual.pdf
WEBM000200 – Hydraulic Excavator PC20R-8, PC27R-8 Shop Manual.pdf
WEBM000201 – Hydraulic Excavator PC20R-8, PC27R-8 Shop Manual.pdf
WEBM002800 – Hydraulic Excavator PC15R-8 Shop Manual.pdf
WEBM002900 – Hydraulic Excavator PC27R-8 Shop Manual.pdf
WEBM003000 – Hydraulic Excavator PC35R-8, PC45R-8 Shop Manual.pdf
WEBM003800 – Hydraulic Excavator PC27R-8 Deluxe Shop Manual.pdf
WEBM003900 – Hydraulic Excavator PC35R-8, PC45R-8 Deluxe Shop Manual.pdf

EXCERPT:
ADJUSTMENT OF VALVE CLEARANCE
• Adjust the clearance between valve and rockers to the following values:
With engine cold – Suction valves 0.20 – Exhaust valve 0.20
1 – Remove the valve cover.
2 – Rotate the drive shaft in the normal direction of rotation, until the No. 1 cylinder is in the top dead centre in a compression stroke corresponding to the alignment between the reference mark on the casing (1) and the mark (2) on the pulley.
* If the cylinder is in a compression stroke, the valves do not move when the drive shaft is rotated slightly. If the valves do move, rotate the drive shaft by one turn and realign the reference marks (1) and (2).
3 – Loosen the lock nut (3) and unscrew the adjustment screw (6) by approximately 1 turn.
* Check that the valve cap (5) is lying flat on the valve stem and that there is no lopsided wear.
1 – If the valve caps (5) are damaged, replace them with new ones.
2 – Make sure that the valve caps fit perfectly and are lying flat on the valve stem.”
4 – Insert the feeler gauge A1 between the rocker (4) and the valve cap (5).
Rotate the adjusting screw (6) until it rubs against the feeler gauge A1.
Secure this position with the nut (3).
Lock nut: 25.5±2.5 Nm
* After locking the nut (3), check the valve clearance again.
5 – After adjusting the No. 1 cylinder, rotate the drive shaft 240° each time and adjust the valve clearance of the other cylinders according to the ignition sequence.
* Ignition sequence: 1 – 3 – 2.
• Assembly of the valve cover
1 – Check the condition of the gasket (7) of the valve cover (8), and the 0-rings (9). Thoroughly clean the contact surface on the cylinder heads.
2 – Replace the valve cover (8) and mount the 0-rings
(9) and the lock nuts (10).
Lock nuts for cover: 25±3 Nm
…
STRUCTURE, FUNCTION AND MAINTENANCE STANDARD – OPERATION FOR EACH FUNCTION AND VALVE
L.H., R.H. TRAVEL JUNCTION CIRCUIT PC27MR, 30MR-2
1. When traveling in a straight line
FUNCTION
ï To compensate for any difference in the oil flow in the left and right travel circuits when traveling in a straight line, the junction circuit opens when the left and right travel spools are operated.
ï In this way, the flow of oil to the left and right travel motors is almost the same when traveling in a straight line, so there is no travel deviation.
ï When steering the machine, the difference in the load pressure returns the reducing valve of the travel valve on the inside of the turn and the opening of the notch in the travel junction valve spool becomes smaller, so the machine can be steered.
OPERATION
ï When left and right travel spools (1) are operated, the pump discharge flows from pump circuit PP and circuits PA to actuator circuits B.
ï When traveling in a straight line, to make actuator circuits PA equal, left and right reducing valves (2) are pushed to the right by the same amount, and notch a and the travel junction circuit are opened.
ï In this way, the left and right travel actuator circuits are interconnected by the travel junction circuit, so if any difference occurs in the flow of oil to the left and right travel motors, the compensation is carried out to prevent any deviation in travel.
2. Steering when traveling
OPERATION
• When traveling in a straight line, if left travel spool (L. H. 1) is returned to the neutral position and the steering is operated, a difference (R. H. B > L. H. B) is generated in the load pressure of left and right travel actuator circuits PA, and LS pressure PLS becomes the same pressure as R.
H. B.
• As a result, flow control valve (3) on the left travel side is pushed to the left by LS circuit PLS.
Because of this, the opening of the left notch a is made smaller, so it becomes possible to operate the steering when traveling.
• Damper b is provided in the circuit to damper any excessive characteristics in the opening or closing of the travel junction circuit if the spool is operated suddenly.

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Komatsu HB205, HB215LC Hybrid Workshop Repair & Service Manual

Komatsu HB205, HB215LC Hybrid

MKMTSHB205OPEK.PDF
Price: $29.99 USD

Complete digital official shop manual contains service, maintenance, and troubleshooting information for the Komatsu HB205-1, HB215LC-1 Hybrid Hydraulic Excavator. Diagnostic and repair procedures are covered in great detail to repair, maintain, rebuild, refurbish or restore your HB205, HB215LC 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 Komatsu HB205-1, HB215LC-1 Hybrid Hydraulic Excavator 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.

“Shop Manual (SEN05393-04).pdf”
Komatsu HB205-1, HB215LC-1 Hybrid Hydraulic Excavator Shop Manual; 1,451 pages

EXCERPT:

General information on troubleshooting – Checks before troubleshooting

Replacing fuel pre-filter cartridge
1. Turn valve (1) at the bottom of the fuel tank to the “CLOSE” (S) position.
2. Open the side cover on the rear right side of the machine.
3. Place a container under the fuel pre-filter cartridge to receive the fuel.
4. Loosen drain valve (2) and drain water and sediments from transparent cup (3), and also drain all the fuel from filter cartridge (4).
5. Disconnect connector (5). Wrap the removed connector with a vinyl bag or the like to protect it from being exposed to fuel, oil and water.
6. Using the filter wrench, rotate transparent cap (3) to remove. (This cap is reused.)
7. Using the filter wrench, rotate filter cartridge (4) to remove.
8. Install currently removed transparent cap (3) to the bottom of the new filter cartridge.
– At this time, replace O-ring (6) with a new one.
9. When installing the transparent cap, apply a thin film of oil to the O-ring, set it against the sealing surface of filter cartridge (4), and then tighten the transparent cap 1/4 to 1/2 turn.
– If the transparent cap is over tightened, fuel will leak because the O-ring will have been damaged. If the transparent cap is not tightened sufficiently, fuel will also leak through the clearance around the O-ring. Therefore, observe the tightening angle.
10. Clean the filter holder, fill the new filter cartridge with clean fuel, apply a thin film of oil to the O-ring, and then install the new filter cartridge with the O-ring on the filter holder.
– Be sure to add fuel through eight small holes (A) which are on the dirty side of the filter without removing center cap (B).
– After filling with the fuel, remove center cap (B) before installing the fuel pre-filter.
– Add clean fuel taking care not to allow dirt to mix in it. Be sure to add fuel without removing center cap (B) which is on the clean side of the filter to prevent dirt from entering.

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Komatsu/DEMAG Hydraulic Shovels Factory Service & Shop Manual

Pages from H185S06111SM – Hydraulic Shovel H185S Shop Manual

MKMTSDEMAGOPEK.PDF
Price: $39.99 USD

Complete workshop & service manual with electrical wiring diagrams for Komatsu/DEMAG Hydraulic Shovels. It’s the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

This Komatsu/DEMAG Hydraulic Shovels H185S, H285S service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. 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. The printer-ready PDF documents work like a charm on all kinds of devices.

FILELIST:
DEMAG Hydraulic Shovel Repair Manual.pdf
H185S06081OMM – Hydraulic Shovel H185S Operation & Maintenance Manual.pdf
H185S06081SM – Hydraulic Shovel H185S Shop Manual.pdf
H185S06108OMM – Mining Shovel H185S Operation & Maintenance Manual.pdf
H185S06108SM – Hydraulic Shovel H185S Electrical & Hydraulic Diagrams.pdf
H185S06111OMM – Hydraulic Shovel H185S Operation & Maintenance Manual.pdf
H185S06111SM – Hydraulic Shovel H185S Shop Manual.pdf
H285S78067OMM – Hydraulic Shovel H285S Operation & Maintenance Manual.pdf
H285S78067SM – Hydraulic Shovel H285S Shop Manual.pdf
H285S78094OMM – Hydraulic Shovel H285S Operation & Maintenance Manual.pdf
H285S78094SM – Hydraulic Shovel H285S Shop Manual.pdf
H285S78115SM – Hydraulic Shovel H285S Operation & Maintenance Manual.pdf
H285S78135SM – Hydraulic Shovel H285S Electrical Diagram.pdf
H285S78139OMM – DEMAG Komatsu Hydraulic Mining Shovels Parts & Service.pdf

EXCERPT:
UPPERSTRUCTURE
The revolving platform is a fabricated box sectioned open frame structure which carries the main module and distributes the attachment and torque forces to the slew ring mounting. The revolving platform is machined at one multi-function tool to ensure consistent accuracy in all planes and to receive without stress the jig assembled modules. The spread at the rear of the frame provides a wide support for the single piece cast steel counterweight.

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Komatsu Motor Grader GD750A, GD825A Factory Service & Shop Manual

Komatsu GD825A-2

MKMTSGD825OPEK.PDF
Price: $29.99 USD

Complete workshop service manual with electrical wiring diagrams for Komatsu Motor Grader GD750A-1, GD705A-4, GD825A-1, GD825A-2. It’s the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

This Komatsu Motor Grader GD750A-1, GD705A-4, GD825A-1, GD825A-2 service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. 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. The printer-ready PDF documents work like a charm on all kinds of devices.

FILELIST:
CEAM002402 – Motor Grader GD750A-1 Operation & Maintenance Manual.pdf
CEBM002104 – Motor Grader GD750A-1 Shop Manual.pdf
SEAM234Y01 – Motor Grader GD705A-3 Operation & Maintenance Manual.pdf
SEAM021400 – Motor Grader GD825A-2 Operation & Maintenance Manual.pdf
SEAM021403T – Motor Grader GD825A-2 Operation & Maintenance Manual.pdf
SEAM036701 – Motor Grader GD705A-4 Operation & Maintenance Manual.pdf
SEAM02350100 – Motor Grader GD825A-1 Operation & Maintenance Manual.pdf
SEBM002308 – Motor Grader GD825A-2 Shop Manual.pdf
SEBM022104 – Motor Grader GD705A-4 Shop Manual.pdf
SEBM02350106 – Motor Grader GD825A-1 Shop Manual.pdf
TEN00012-00 – Motor Grader GD825A-2 Operation & Maintenance Manual.pdf
TEN00334-02 – Motor Grader GD825A-2 Operation & Maintenance Manual.pdf

EXCERPT:
PILOT REDUCING VALVE
Function
• The pilot reducing valve acts to control the pressure needed to actuate the transmission spools.
Operation
• The oil from the pump passes through the pilot filter and enters port A of pilot reducing valve (1).
The oil passes through port B and enters through the orifice of transmission spool (2) to fill the inside of port C.
• When the pressure inside port C rises, pressurized oil flows from orifice “a” of pilot reducing valve (1) and goes to port D.
As a result pilot reducing valve (1) moves to the right, and ports A and Bare shut off, so the pressurized oil at port C is maintained at the same pressure.

Function of pilot circuit drain
This pilot valve functions as a reducing valve primary pressure: 1.47 MPa (15 kg/cm2); secondary pressure: 1.06 MPa (1 0.8 kg/cm2). If the reducing valve does not have drain port a at the secondary side, it is impossible to obtain the specified reducing pressure.
For example, at the Neutral position, if there is no secondary pressure at drain port a, theoretically the pressure generated at the secondary side is the same pressure as the primary pressure. (Actually, it is not as high as the primary side because of leakage from the valve spool.)

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Komatsu Motor Grader GD555, GD655, GD675 Workshop Repair & Service Manual

Komatsu GD555-3C, GD655-3C, GD675-3C Motor Grader

MKMTSGD555675OPEK.PDF
Price: $29.99 USD

Complete digital official shop manual contains service, maintenance, and troubleshooting information for the Komatsu GD555-3A, GD555-3C, GD555-5, GD655-3A, GD655-3C, GD655-3E0, GD655-5, GD675-3A, GD675-3C, GD675-3E0, GD675-5 Motor Grader. Diagnostic and repair procedures are covered in great detail to repair, maintain, rebuild, refurbish or restore your motor grader 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 Komatsu Motor Grader GD555-3A, GD555-3C, GD555-5, GD655-3A, GD655-3C, GD655-3E0, GD655-5, GD675-3A, GD675-3C, GD675-3E0, GD675-5 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.

FILELIST:
GSAM042401 – Motoniveladora GALEO GD555-3A Manual de Operacion y Mantenimiento.pdf
GSBM021002 – GD555-3A, GD655-3A, GD675-3A Manual de Taller.pdf
KEAM037900 – Motor Grader GALEO GD655-3C Operation & Maintenance Manual.pdf
KEAM038000 – Motor Grader GALEO GD675-3C Operation & Maintenance Manual.pdf
KEAM038100 – Motor Grader GALEO GD555-3C Operation & Maintenance Manual.pdf
PEN00178-01 – Motor Grader GD555-3A Operation & Maintenance Manual.pdf
SEAM23DA03 – Motor Grader GD605A-1, GD655A-1 Operation & Maintenance Manual.pdf
SEAM023DUS01 – Motor Grader GD605A-3, GD655A-3 Operation & Maintenance Manual.pdf
SEAM037902T – Motor Grader GD655-3C Operation & Maintenance Manual.pdf
SEAM038002 – Motor Grader GD675-3C Operation & Maintenance Manual.pdf
SEAM038003 – Motor Grader GD675-3C Operation & Maintenance Manual.pdf
SEAM038102T – Motor Grader GD555-3C Operation & Maintenance Manual.pdf
SEAM042401 – Motor Grader GALEO GD555-3A Operation & Maintenance Manual.pdf
SEAM052800T – Motor Grader GALEO GD655-3A Operation & Maintenance Manual.pdf
SEBM020906 – Motor Grader GD555-3C, GD655-3C, GD675-3C Shop Manual.pdf
SEBM020909 – Motor Grader GD555-3C, GD655-3C, GD675-3C Shop Manual.pdf
SEBM021007 – Motor Grader GD555-3A, GD655-3A, GD675-3A Shop Manual.pdf
SEBM021008 – Motor Grader GD555-3A, GD655-3A, GD675-3A Shop Manual.pdf
SEN01775-05 – Motor Grader GD655-3E0, GD675-3E0 Shop Manual.pdf
SEN05215-06 – Motor Grader GD555-5, GD655-5, GD675-5 Shop Manual.pdf
TEN00095-01 – Motor Grader GALEO GD655-3C Operation & Maintenance Manual.pdf
TEN00149-05 – Motor Grader GD655-3E0 Operation & Maintenance Manual.pdf
TEN00150-05 – Motor Grader GD675-3E0 Operation & Maintenance Manual.pdf
TEN00177-02 – Motor Grader GD555-3A Operation & Maintenance Manual.pdf
TEN00178-02 – Motor Grader GD555-3C Operation & Maintenance Manual.pdf
TEN00179-02 – Motor Grader GD655-3A Operation & Maintenance Manual.pdf
TEN00368-01 – Motor Grader GD655-5 Operation & Maintenance Manual.pdf
TEN00369-01 – Motor Grader GD675-5 Operation & Maintenance Manual.pdf
TEN00445-02 – Motor Grader GD555-5 Operation & Maintenance Manual.pdf
TEN00446-02 – Motor Grader GD655-5 Operation & Maintenance Manual.pdf
TEN00447-02 – Motor Grader GD675-5 Operation & Maintenance Manual.pdf
TEN00448-00 – Motor Grader GD655-3E0 Operation & Maintenance Manual.pdf
TEN00449-01 – Motor Grader GD675-3E0 Operation & Maintenance Manual.pdf

EXCERPT:

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD HYDRAULIC PUMP
FUNCTION
• The engine rotation and torque transmitted to the pump shaft is converted into hydraulic energy, and pressurized oil is discharged according to the load.
• It is possible to change the discharge amount by changing the swash plate angle.
STRUCTURE
• Cylinder block (7) is supported to shaft (1) by spline a, and shaft (1) is supported by the front and rear bearings.
• The tip of piston (6) is a concave ball, and shoe (5) is caulked to it to form one unit. Piston (6) and shoe (5) form a spherical bearing.
• Rocker cam (4) has flat surface A, and shoe (5) is always pressed against this surface while sliding in a circular movement. Rocker cam (4) brings high pressure oil at cylindrical surface B with cradle (2), which is secured to the case and forms a static pressure bearing when it slides.
• Piston (6) carries out relative movement in the axial direction inside each cylinder chamber of cylinder block (7).
• Cylinder block (7) seals the pressure oil to valve plate (8) and carries out relative rotation. This surface is designed so that the oil pressure balance is maintained at a suitable level.
The oil inside each cylinder chamber of cylinder block (7) is sucked in and discharged through valve plate (8).

OPERATION
1. Operation of pump
i) Cylinder block (7) rotates together with shaft (1), and shoe (5) slides on flat surface A.
When this happens, rocker cam (4) moves along cylindrical surface B, so angle between center line X of rocker cam (4) and the axial direction of cylinder block (7) changes. Angle is called the swash plate angle.
ii) Center line X of rocker cam (4) maintains swash plate angle in relation to the axial direction of cylinder block (7), and flat surface A moves as a cam in relation to shoe (5).
In this way, piston (6) slides on the inside of cylinder block (7), so a difference between volume E and F is created inside cylinder block (7). The suction and discharge is carried out by this difference F – E.
In other words, when cylinder block (7) rotates and the volume of chamber E becomes smaller, the oil is discharged during that stroke.
At the same time, the volume of chamber F becomes larger, and as the volume becomes larger, oil is sucked in.
(The diagram shows chamber F at the end of the suction process and chamber E at the end of the discharge process.)
iii) If center line X of rocker cam (4) is in line with the axial direction of cylinder block (7) (swash plate angle = 0), the difference between volumes E and F inside cylinder block (7) becomes 0, so the pump does not carry out any suction or discharge of oil. (In actual fact, the swash plate angle never becomes 0.)
iv) In other words, there is a proportional relationship between swash plate angle and the pump discharge amount.