1-13100-192-0 1-13100-192-1 Oil Pump Assembly for Hitachi EX100 EX120

1-13100-192-0 Oil Pump for Hitachi EX100 and EX120

The 1-13100-192-0 / 1-13100-192-1 engine oil pump is supplied for Hitachi excavator engine lubrication system repair. It is commonly searched as 1131001920, 1131001921, engine oil pump, oil pump assembly or lubrication oil pump for Hitachi EX100, EX120 and EX120-1 excavator references using Isuzu 4BD1 / 4BD1T diesel engine applications.

This page focuses on 1-13100-192-0 and 1-13100-192-1 as the main part numbers. 1131001920 and 1131001921 are compact no-hyphen writing formats for search and checking. Final fitment should be confirmed by the old oil pump number, engine model, pump body shape, gear side, mounting face and machine information before ordering.

Engine Application: Isuzu 4BD1 and 4BD1T

For this product page, the Isuzu 4BD1 / 4BD1T engine direction should be the main engine signal. Buyers may search by engine model when the excavator model is unclear, when the engine has been rebuilt, or when the oil pump has already been removed from the machine.

The SEO Title should cover Hitachi EX100 and EX120 machine search intent, while the H1 should reinforce the Isuzu 4BD1 / 4BD1T engine search path. This structure helps the page cover both buyer behaviors: searching by excavator model and searching by engine model or 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 old pump number and physical pump details before quotation.

Machine Reference for Hitachi EX100 and EX120 Repairs

The strongest machine references for this oil pump page are Hitachi EX100 and EX120. The current page image information also points to Hitachi EX120-1 excavator engine lubrication oil pump use, which should be kept as an application reference instead of being hidden in image ALT only. :contentReference[oaicite:1]{index=1}

These model names should be treated as application references, not as the only fitment proof. Older Hitachi EX series excavators often have long working hours, previous overhaul history, engine replacement or mixed-source repair parts.

For accurate ordering, compare the removed oil pump with the replacement unit before shipment. Photos of the pump gear side, body housing, mounting face, oil passage area, old part number and engine nameplate are useful for confirmation.

Part Number and Reference Notes

1-13100-192-0 and 1-13100-192-1 are the main part number directions for this product page. The compact formats 1131001920 and 1131001921 should be included for buyer search coverage, but they should not replace the original hyphenated part numbers as the main page signal.

This page should not be mixed with oil pump numbers for Isuzu 6BD1, 6BG1, 4BG1, 4HK1 or other engine families unless the old pump or supplier data confirms interchange. Keeping this page focused on 1-13100-192-0, 1-13100-192-1, Hitachi EX100 / EX120 and Isuzu 4BD1 helps avoid part number dilution.

If a buyer sends another Isuzu oil pump number, it should be checked against the old pump photo, engine model, gear side and mounting face before being treated as a valid cross reference.

How to Confirm the Correct 1-13100-192-0 Oil Pump

Engine oil pumps can look similar from the outside, but small differences in gear design, mounting face, oil passage layout or pump housing shape may cause installation problems. Before ordering, compare the removed pump carefully.

• Confirm whether the old oil pump number is 1-13100-192-0, 1-13100-192-1, 1131001920 or 1131001921.

• Check whether the engine model is Isuzu 4BD1 or 4BD1T.

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

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

• Confirm gasket surface, bolt hole pattern and timing cover 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 Isuzu 4BD1 / 4BD1T 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 cover area and engine nameplate can also help confirm the correct replacement direction.

This is especially important for older EX100 and EX120 machines, 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 excavator shows low oil pressure, oil pressure warning, unstable lubrication after startup, abnormal bearing noise, overheating, metal particles in engine oil or serious internal engine wear.

On older Hitachi EX series excavators, low oil pressure may appear after long work cycles, poor oil maintenance, engine overheating, 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 1-13100-192-0 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 cover 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 1-13100-192-0 / 1-13100-192-1 oil pump is suitable for Hitachi EX100, EX120 and Isuzu 4BD1 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 Hitachi EX series excavator 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 1-13100-192-0 / 1-13100-192-1 engine oil pump used for Hitachi excavator and Isuzu 4BD1 / 4BD1T engine lubrication system repair.

Is 1131001920 the same search reference as 1-13100-192-0?

1131001920 is the compact no-hyphen writing format of 1-13100-192-0. The main part number of this page should remain 1-13100-192-0, and the removed oil pump should still be checked before ordering.

Can 1-13100-192-1 be used as a reference?

1-13100-192-1 appears as the paired reference on this page direction. It should be checked together with the old pump number, engine model and physical pump configuration before ordering.

Which engine models are the main references?

The main engine references are Isuzu 4BD1 and 4BD1T. 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 machine references are Hitachi EX100, EX120 and EX120-1. These should be treated as application references, and the old pump and engine information should be checked before shipment.

What should I check before ordering?

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

What can cause repeated oil pump or low oil pressure problems?

Repeated problems may be caused by dirty engine oil, clogged oil strainer, blocked oil passages, worn bearings, pressure relief valve faults, sludge in the oil pan or installing a new pump without cleaning the lubrication system.