6136-52-1210 Oil Pump Assembly for Komatsu WA300-1 & WA320-1

6136-52-1210 Oil Pump for Komatsu WA300-1 and WA320-1

The 6136-52-1210 engine oil pump is supplied for Komatsu engine lubrication system repair, especially WA300-1, WA320-1 and related WA series wheel loader references using Komatsu 6D105, S6D105 or S6D105-B-1A engine applications.

This page focuses on 6136-52-1210 as the main part number. 6136521210 is the compact no-hyphen search format, while 6136-52-1100 and 6136521100 can be used as checking references. Final fitment should be confirmed by the old oil pump number, engine model, gear side, pump housing, mounting face and machine information before ordering.

Engine Application: Komatsu 6D105, S6D105 and S6D105-B-1A

For this product page, the engine model is the most reliable confirmation point. Komatsu 6D105, S6D105 and S6D105-B-1A engine references are commonly connected with this oil pump direction, while the machine model should be used as an application reference rather than the only fitment proof.

The SEO Title should cover WA300-1 and WA320-1 wheel loader search intent, while the H1 should reinforce the Komatsu 6D105 / S6D105 engine search path. This structure helps the page reach buyers who search by loader model, engine model or old oil pump number.

If the buyer only provides the machine model, ask for the engine nameplate and old oil pump photos. If the buyer only provides the engine model, confirm the removed pump number and physical pump details before quotation.

Machine Reference for Komatsu WA Series Wheel Loaders

The strongest machine references for this page are Komatsu WA300-1 and WA320-1 wheel loaders. Market references may also mention WA200-1, WA250-1, WA350-1, WA380-1, WA400-1 and WA420-1 when the old pump number and engine configuration match.

Wheel loaders often work under long load cycles, dusty jobsite conditions and high engine operating hours. For these machines, oil pump condition is important for stable lubrication, bearing protection and long-term engine reliability.

These model names should be treated as application references, not as guaranteed fitment. Older Komatsu wheel loaders may have engine replacement, previous overhaul history or non-original oil pump changes.

Excavator Reference and Fitment Caution

Some market references also connect 6136-52-1210 with Komatsu PC200-1, PC200-3 and PC220-3 excavator applications. These can be mentioned as checking references, but they should not replace the WA300-1 / WA320-1 positioning of this page unless the old pump number confirms the same part.

Komatsu 6D105 engine oil pumps can appear in similar search results with nearby part numbers, so machine model alone is not enough for final confirmation. The old oil pump number and physical pump comparison are more reliable.

If a buyer is asking for PC200-3 or PC220-3, please request the removed pump photos before quotation. If the old pump number is not 6136-52-1210 or 6136-52-1100, it may need a separate oil pump page or a different quotation.

Part Number and Cross Reference Notes

6136-52-1210 is the main part number of this product page. The compact format 6136521210 should be included for search coverage, but it should not replace the original hyphenated part number as the main page signal.

6136-52-1100 and 6136521100 can be used as checking references for this WA series oil pump direction. These references are useful for buyer matching, but the removed pump and engine information should still be checked before shipment.

I do not recommend placing 6136-51-1002 or 6136-51-1000 in the top parameter Ref Cross line for this page. Those numbers appear in the current image ALT information, but they can dilute the 6136-52-1210 page signal and may point buyers toward a different Komatsu oil pump direction.

How to Confirm the Correct 6136-52-1210 Oil Pump

Komatsu engine oil pumps can look similar from the outside, but the gear side, pump housing, bolt hole layout and oil passage design may differ. Before ordering, compare the removed pump carefully.

• Confirm whether the old oil pump number is 6136-52-1210, 6136521210, 6136-52-1100 or 6136521100.

• Check whether the engine model is Komatsu 6D105, S6D105 or S6D105-B-1A.

• Compare the pump gear side, housing shape and mounting face.

• Check oil inlet, oil outlet and internal oil passage positions.

• Confirm gasket surface, bolt hole pattern and timing gear fitment area.

• Send machine model, engine nameplate and old oil pump photos before quotation if you are not sure.

Why Gear Side and Oil Passage Matching Matter

For Komatsu 6D105 and S6D105 engine oil pump replacement, the gear side and oil passage layout are important checking points. A pump may look correct from the front view but still differ in gear position, body thickness, bolt hole alignment or internal oil passage design.

Repair shops should provide photos of both sides of the removed oil pump. If the pump has already been removed from the engine, photos of the timing gear area and engine nameplate can also help confirm the correct replacement direction.

This confirmation is especially important for classic Komatsu wheel loaders and excavators because previous repairs may have changed the engine configuration or installed a non-original oil pump.

Common Oil Pump Failure Symptoms

An engine oil pump may need replacement when the machine shows low oil pressure, oil pressure warning, unstable lubrication after startup, abnormal bearing noise, engine overheating, metal particles in engine oil or serious internal engine wear.

On WA series wheel loaders, low oil pressure may appear after long loading cycles, poor oil maintenance, overheating, dust contamination, oil sludge buildup or internal bearing wear. The oil pump should be checked together with the complete lubrication system.

These symptoms are not always caused by the oil pump itself. Blocked oil passages, dirty engine oil, worn bearings, damaged pickup tube, clogged strainer, pressure relief valve problems or incorrect engine oil viscosity can create similar problems.

Troubleshooting Before Replacement

Before ordering a 6136-52-1210 replacement oil pump, check the lubrication system and the real reason for low oil pressure. This helps avoid replacing the pump when the root cause is oil contamination, bearing wear or blockage.

• Check engine oil level, oil grade and oil contamination.

• Inspect the oil filter, oil strainer and pickup tube condition.

• Check whether sludge or metal particles are present in the oil pan.

• Inspect crankshaft bearings, camshaft bearings and related lubrication surfaces.

• Confirm whether the pressure relief valve is stuck, worn or contaminated.

• Clean the oil circuit if the old pump failed due to contamination, sludge or engine wear.

Installation and Maintenance Notes

Before installation, clean the timing gear area, mounting surface and oil passages. Compare the replacement pump with the removed unit, including gear position, pump body shape, bolt holes and gasket surface.

Use a proper gasket or sealing method according to the engine repair requirement. After installation, check oil pressure during startup and confirm that oil circulates normally before putting the engine under load.

For longer service life, use clean engine oil, replace filters on time and avoid running the engine with low oil pressure. If the previous failure was caused by sludge, bearing wear or contamination, those causes should be corrected during repair.

Buying Notes for Repair Shops and Parts Distributors

For repair shops, this 6136-52-1210 engine oil pump is suitable for Komatsu 6D105 and S6D105 engine lubrication repair when the old pump is worn, damaged or unable to maintain stable oil pressure.

For parts distributors, it can be supplied as a replacement oil pump reference for Komatsu WA300-1, WA320-1 and related WA series service demand. Topvelsun supports small repair orders and bulk inquiries. Please send the required quantity, old pump number, engine model, machine model and photos of the old oil pump from multiple angles.

FAQ

What is the main product on this page?

This page is for the 6136-52-1210 engine oil pump used for Komatsu 6D105, S6D105 and S6D105-B-1A engine lubrication system repair.

Is 6136521210 the same search reference as 6136-52-1210?

6136521210 is the compact no-hyphen writing format of 6136-52-1210. The main part number of this page should remain 6136-52-1210, and the removed oil pump should still be checked before ordering.

Can 6136-52-1100 be used as a cross reference?

6136-52-1100 and 6136521100 can be used as checking references for this oil pump direction. Final fitment should still be confirmed by the old pump number, engine model and physical pump configuration.

Should 6136-51-1002 be used as a Ref Cross on this page?

No, not in the top parameters unless your supplier or old pump confirms interchange. 6136-51-1002 is a nearby Komatsu oil pump direction and should not dilute this 6136-52-1210 page.

Which engine models are the main references?

The main engine references are Komatsu 6D105, S6D105 and S6D105-B-1A. Final confirmation should be based on the removed oil pump, engine nameplate and pump physical configuration.

Which machine models can be used as references?

The main page references are Komatsu WA300-1 and WA320-1. Other WA series loaders and some PC series excavator references may appear in market listings, but the old pump number should be checked before ordering.

What should I check before ordering?

Please check the old oil pump number, engine model, pump housing, gear side, mounting face, bolt hole pattern and oil passage position. Clear photos of the removed pump are recommended.