No Products in the Cart
Nitrile (NBR) O-Ring Assortment Kit, Metric, ...: 
Universal Filter Strap Wrench for Oil, Fuel a...: Bosch 1110010028 is the screw in common rail pressure limiting valve with a hex head, threaded body, sealing ring and a capped nose with a small drilled outlet. It is used on Cummins ISF3.8, QSB and Komatsu 6D107 engines. 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 | Common Rail Pressure Relief Valve |
| Replaces | Bosch 1110010028 |
| Engine | Cummins ISF3.8, QSB, 4BT, 6BT; Komatsu SAA6D107 |
| Machine | Komatsu PC200-8, PC210-8, PC220-8, PC240-8 |
| Fits | Bosch common rail fuel rails |
| Fits | Cummins ISF3.8, QSB, 4BT and 6BT engines and the Komatsu SAA6D107 engine in PC200-8, PC210-8, PC220-8 and PC240-8 excavators |
| Condition | New, aftermarket |
| Stat. HS-Code | 848140 |
| Country of Manufacture | China |
Machines
Check the part number on your old unit before ordering.
| Bosch Part No.(SPM Part No.) | Fits |
|---|---|
| 1110010028(SPM-HEP-5106) | Cummins ISF3.8, QSB, 4BT and 6BT engines and the Komatsu SAA6D107 engine in PC200-8, PC210-8, PC220-8 and PC240-8 excavators |
Low rail pressure codes
A common rail pressure relief valve that leaks returns fuel to tank and the ECU logs low rail pressure faults.
Hard starting and loss of power
When the valve opens early the rail cannot build pressure: long cranking, misfire and power loss under load.
Fuel in the return line
Heavy flow from the valve's return port with the engine running is a sign it has opened and stuck.
Matching the old valve
Match the number stamped on the old valve and use a new sealing washer when fitting.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| BlueStars Diesel (commonrailparts.net) | USD 16.00 | 2 Nov 2026 |
| eBay, aftermarket seller | USD 18.99 | 2 Nov 2026 |
| SINOCMP | USD 59.00 | 2 Nov 2026 |
| Buy Machinery Parts | USD 69.26 | 2 Nov 2026 |
| Fab Heavy Parts | USD 100.80 | 2 Nov 2026 |
| Spare Part Mart | USD 13.59 | Today |
Our price of USD 13.59 is 15% to 87% 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 Bosch common rail fuel rails. Check the old fuel relief valve is marked 1110010028 or one of the cross references, because makers change parts between serial ranges.
On the Bosch common rail fuel rails, it depends on hours and working conditions. Follow the machine service schedule, and change it when it shows wear rather than waiting for it to fail.
Leaks, noise, loss of performance, or visible wear compared with a new part. If in doubt, measure it against the sizes in the specifications.
Yes. Every order is covered by our 30 day money back guarantee. Keep it unused and in its packaging.
Match the part number on the old fuel relief valve to Bosch 1110010028 or a number in the cross reference table. If the number is worn off, compare the sizes in the specifications.
No. It is an aftermarket fuel relief valve made to replace the Bosch 1110010028. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
Join and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that. Turn points into a discount whenever you like.
Opens the Marty Mates panel. No password: you enter your email, we send a code, and that is you in with your 200 points waiting. Joining signs you up to our emails and you can leave any time from the link in any of them. See our terms and conditions.
Member deals, specials before they go public, and easy ways to stack up points. Plus a nudge when a part you bought is due, so you are not caught out mid job.
You can leave any time from the link in any email we send. See our terms and conditions.
We will only bother you when it is worth it: a member deal, a specials drop, a way to earn points faster, or a heads up that a part you bought is due.
Join Marty Mates and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that.
No password: you enter your email, we send a code, and that is you in.
