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Nitrile (NBR) O-Ring Assortment Kit, Metric, ...: 
Universal Filter Strap Wrench for Oil, Fuel a...: SPM-HEP-5200 is the main relief valve cartridge for the control valve: a long steel body with the radial ports on the poppet end, the thread and O-ring, and the hex adjuster and lock nuts. It is used on Hitachi EX200-5 and EX220-5 excavators. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
It replaces Hitachi 4386637 and Hitachi 4381811.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Main Relief Valve |
| Replaces | Hitachi 4386637 |
| Type | Main relief valve cartridge |
| Machine | Hitachi EX200-5, EX220-5 |
| Cross references | Hitachi 4381811 |
| Fits | Hitachi EX200-5 and EX220-5 excavators |
| Condition | New, aftermarket |
| Stat. HS-Code | 848140 |
| Country of Manufacture | China |
Hitachi machines
Check the part number on your old unit before ordering.
| Hitachi Part No.(SPM Part No.) | Fits |
|---|---|
| 4386637(SPM-HEP-5200) | Hitachi EX200-5 and EX220-5 excavators |
| 4381811(SPM-HEP-5200) | Hitachi EX200-5 and EX220-5 excavators |
Slow or weak hydraulics
A main or port relief valve that opens early or will not seat dumps oil to tank: the boom, arm or swing slows and loses force. Check pump pressure at the test port first.
Overheating oil
A relief valve that leaks past its seat turns pump flow into heat, so the hydraulic oil runs hot during normal work.
Pressure that will not set
If adjusting the relief screw no longer changes the pressure, the spring, poppet or seat is worn and the cartridge needs replacing.
Matching the old valve
Match the full part number stamped on the old cartridge, and set the pressure to the machine's service figure after fitting.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (4 aftermarket sellers) | USD 69.99 to 79.90 | 3 Nov 2026 |
| SINOCMP | USD 139.00 | 3 Nov 2026 |
| Spare Part Mart | USD 55.99 | Today |
Our price of USD 55.99 is 20% to 60% 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 Hitachi EX200-5, and 1 more listed under compatible equipment. Check the old relief valve is marked 4386637 or one of the cross references, because makers change parts between serial ranges.
On the Hitachi EX200-5, 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.
Match the part number on the old relief valve to Hitachi 4386637 or a number in the cross reference table. If the number is worn off, compare the sizes in the specifications.
Keep it until the new one is fitted and running. It is the quickest way to compare sizes, connectors and mounting if anything looks different.
No. It is an aftermarket relief valve made to replace the Hitachi 4386637. 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.
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