Part number 700-587 is an upper piston guide designed to align and support the piston within the pump cylinder on compatible Airless Sprayer, Advantage, Epic, Helix, Impact, Performer, PowrLiner, ProMark, and RentSpray equipment. This precision component maintains proper piston orientation, reduces friction, and prevents metal‑to‑metal contact, ensuring smooth operation and extending pump life. Replacing a worn, scored, or damaged upper piston guide restores pump efficiency, eliminates noise, and prevents premature wear of the piston and cylinder.
| Part Number | 700-587 |
|---|---|
| Part Description | Upper Piston Guide |
| Brand | Airless Sprayer / Advantage / Epic / Helix / Impact / Performer / PowrLiner / ProMark / RentSpray |
| Fits | Airless Sprayer: 330, 340, 440 XC, 440 IX, 550 XC, 440 I, 540 IX, 690 GXC, 660 XC, 640 I, 640 IX; Advantage: 400, 500; Epic: 447 HPX, 447ex, 660ex, 690 GX, 660 HPX; Helix: LP; Impact: 410, 440, 640 I and IA, 640, X410, X440, X540 I; Performer: 640 I; PowrLiner: 2800, 3100, 1800M, 2800M; ProMark: II; RentSpray: 450, 600, 650, 500, 600 Impact, 700, RentSpray Plus |
| Condition | New |
The 700-587 Upper Piston Guide is a critical wear component that aligns and supports the piston within the pump cylinder on compatible Airless Sprayer, Advantage, Epic, Helix, Impact, Performer, PowrLiner, ProMark, and RentSpray equipment. It ensures the piston moves smoothly and concentrically, reducing friction and preventing metal‑to‑metal contact that can lead to rapid wear and pump failure.
Over time, piston guides can become worn, scored, or damaged due to normal use, contamination, or inadequate lubrication. A worn guide may cause the piston to wobble, leading to increased friction, reduced pump efficiency, noise, and accelerated wear of the piston and cylinder. Replacing the upper piston guide restores proper alignment, smooth operation, and extends the service life of the entire pump assembly.
| Piston alignment | Maintains proper piston position within the cylinder |
|---|---|
| Friction reduction | Provides a low‑friction bearing surface |
| Wear prevention | Prevents metal‑to‑metal contact between piston and cylinder |
| Visible wear / scoring | Grooves or wear on the guide surface |
|---|---|
| Excessive play | Piston wobbles or moves side‑to‑side |
| Noisy operation | Knocking or grinding from pump area |
| During pump overhaul | Always replace guides when rebuilding pump |
Part number 700-587 is compatible with the following equipment models. Always confirm fitment using the correct parts diagram for your exact model and serial number.
| Brand / Series | Model | Component |
|---|---|---|
| Airless Sprayer | 330 | Upper Piston Guide |
| 340 | Upper Piston Guide | |
| 440 XC | Upper Piston Guide | |
| 440 IX | Upper Piston Guide | |
| 550 XC | Upper Piston Guide | |
| 440 I | Upper Piston Guide | |
| 540 IX | Upper Piston Guide | |
| 690 GXC | Upper Piston Guide | |
| 660 XC | Upper Piston Guide | |
| 640 I | Upper Piston Guide | |
| 640 IX | Upper Piston Guide | |
| Advantage | 400 | Upper Piston Guide |
| 500 | Upper Piston Guide | |
| Epic | 447 HPX | Upper Piston Guide |
| 447ex | Upper Piston Guide | |
| 660ex | Upper Piston Guide | |
| 690 GX | Upper Piston Guide | |
| 660 HPX | Upper Piston Guide | |
| Helix | LP | Upper Piston Guide |
| Impact | 410 | Upper Piston Guide |
| 440 | Upper Piston Guide | |
| 640 I and IA | Upper Piston Guide | |
| 640 | Upper Piston Guide | |
| X410 | Upper Piston Guide | |
| X440 | Upper Piston Guide | |
| X540 I | Upper Piston Guide | |
| Performer | 640 I | Upper Piston Guide |
| PowrLiner | 2800 | Upper Piston Guide |
| 3100 | Upper Piston Guide | |
| 1800M | Upper Piston Guide | |
| 2800M | Upper Piston Guide | |
| ProMark | II | Upper Piston Guide |
| RentSpray | 450 | Upper Piston Guide |
| 600 | Upper Piston Guide | |
| 650 | Upper Piston Guide | |
| 500 | Upper Piston Guide | |
| 600 Impact | Upper Piston Guide | |
| 700 | Upper Piston Guide | |
| RentSpray Plus | Upper Piston Guide |
Piston guide issues may involve associated components. When servicing the upper piston guide, these parts are commonly inspected or replaced at the same time.
Inspect the piston for scoring or wear; replace if damaged.
Check lower guide for wear; replace as a set for even performance.
Replace all seals and packings when rebuilding the pump.
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