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Nitrile (NBR) O-Ring Assortment Kit, Metric, ...: 
Universal Filter Strap Wrench for Oil, Fuel a...: Komatsu 723-40-71900 is the self reducing pilot pressure valve: a machined steel valve block with an adjuster and lock nut on one side, mounting holes through the block and plugged ports, with the casting number 71411 on the end face. It is used on Komatsu PC220-8 and PC300-8 excavators. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Self Reducing Pilot Valve |
| Replaces | Komatsu 723-40-71900 |
| Machine | Komatsu PC210-8, PC220-8, PC240-8, PC300-8, PC240LC-10 |
| Function | Reduces pump pressure to pilot pressure for the controls |
| Fits | Komatsu PC210-8, PC220-8, PC240-8, PC300-8 and PC240LC-10 excavators |
| Condition | New, aftermarket |
| Stat. HS-Code | 848180 |
| Country of Manufacture | China |
Komatsu machines
Check the part number on your old unit before ordering.
| Komatsu Part No.(SPM Part No.) | Fits |
|---|---|
| 723-40-71900(SPM-HEP-5097) | Komatsu PC210-8, PC220-8, PC240-8, PC300-8 and PC240LC-10 excavators |
Controls weak or dead
The pilot (self reducing) valve feeds the low pressure oil the joysticks and pedals use. When it fails every function becomes sluggish or stops responding together.
Low pilot pressure reading
A gauge on the pilot circuit reading well under the service figure, with a healthy pump, points to the reducing valve.
Travel or attachment pedal problems
A worn foot pilot valve gives jerky or one sided travel and attachment control.
Matching the old unit
Match the part number on the old valve and check the port layout before fitting.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay, aftermarket seller | USD 85.69 | 2 Nov 2026 |
| Fab Heavy Parts | USD 100.64 | 2 Nov 2026 |
| SINOCMP | USD 101.00 | 2 Nov 2026 |
| FridayParts | USD 126.00 | 2 Nov 2026 |
| Spare Part Mart | USD 64.74 | Today |
Our price of USD 64.74 is 24% to 49% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it was made for the Komatsu PC210-8, and 4 more listed under compatible equipment. Check the old pilot valve is marked 723-40-71900 or one of the cross references, because makers change parts between serial ranges.
On the Komatsu PC210-8, there is no fixed interval. It is changed when it fails, and many fail from water in the plug or chafed wiring rather than wear.
A fault code for this circuit, readings that jump or stay fixed, or a part that does not respond with power at the plug.
Yes. Many machines have 12 V and 24 V versions of the same pilot valve. Check the old part or the machine plate before fitting.
Read the fault codes, then check the plug and wiring for corrosion or a broken wire. A wiring fault reads the same as a failed pilot valve.
No. It is an aftermarket pilot valve made to replace the Komatsu 723-40-71900. It is not made by the original manufacturer; the number only shows what it replaces.
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