Product Overview
The Graco 17J874 Pump Assembly Kit is a complete, pre-assembled ProXChange pump designed to replace a worn or damaged pump so your sprayer can prime and spray like new. It includes the pump housing, check valves and packings—no special tools required for ProXChange-style swaps.
Compatible Machines
This kit fits the following Magnum ProX / ProLTS models (stand & cart variants) and select sister units:
- Magnum ProX17 – Stand 17G177, Cart 17G178
- Magnum ProX19 – Stand 17G179, Cart 17G180
- Magnum Pro LTS 170 – Stand 17H198
- Magnum Pro LTS 190 – Cart 17H206
- Magnum ProX19 Cart (Cordless) – 25U478
- Airlessco SP340 Hi-Boy – 17H205
- Airlessco 3400 Mustang Hi-Boy – 17H204
Tip: Always verify against your exact model/serial and parts manual. Some retailer lists may include additional close relatives (e.g., SP3400/17H224) but the core fit is the ProX17 / ProX19 family and their ProLTS counterparts.
Why Choose the 17J874 Kit?
- Genuine Graco parts for durability and reliable sealing.
- Pre-assembled pump & valves cut downtime vs. piece-by-piece rebuilds.
- Fixes prime/spray issues caused by worn packings or check-ball valves.
- ProXChange™ design enables quick, on-site swap on compatible sprayers.
Quick Specs
| OEM Part | Graco 17J874 Pump Assembly Kit |
| Pump Type | Complete pre-assembled ProXChange piston pump (housing, check valves, packings) |
| Primary Families | Magnum ProX17, Magnum ProX19 (stand & cart) |
| Common Symptoms Resolved | Poor priming, won’t spray, loss of pressure due to worn packings / valve failure |
| Installation | Tool-free pump swap on ProXChange-equipped models; follow sprayer manual |
Installation & Compatibility Notes
- Match the kit to your exact sprayer model (ID plate) before ordering.
- Follow the sprayer’s owner manual for depressurizing and pump removal.
- If your unit is not a ProX17/ProX19 (or ProLTS 170/190 equivalents), check its parts manual—other pumps (e.g., 288703) may be required.
Frequently Asked Questions
If your unit is a Magnum ProX17 or ProX19 (stand/cart), or the listed Pro LTS 170/190 variants, 17J874 is the correct full pump assembly. For other models, verify against the parts manual to avoid ordering the wrong pump.
Persistent no-prime, inability to maintain pressure, or leakage associated with worn packings/check-valves often justifies replacing the entire assembly for faster, more reliable restoration—especially on ProXChange models.
On ProXChange-equipped sprayers, the pump is designed for a quick swap. Always follow the manual to depressurize, lock the trigger and disconnect power before removal/installation.
Yes. The 17J874 Pump Assembly comes pre-assembled with the housing, packings and check-valve components, eliminating separate rebuild steps.
Check the parts manual for your sprayer by model & type (stand/cart). Some similar machines use different pump part numbers. If needed, contact us with your model number and serial for confirmation.
