Graco 288703 Pump Assembly - Aftermarket Replacement

Restore smooth priming and steady pressure with this complete pump assembly that replaces Graco 288703. Built for the Magnum contractor line, the unit arrives pre-assembled with the lower pump, ready to swap into compatible frames so you can get back to spraying quickly. It’s tuned for common architectural coatings and sized for the flow demands of mid-range cart sprayers. See the compatibility list below and confirm against your sprayer’s Illustrated Parts List before ordering the replacement.

Aftermarket Factory Geometry Contractor Duty

Why Choose This Pump Assembly

  • Complete lower unit for straightforward swap and minimal downtime.
  • Restores prime, pressure build, and pattern stability on mid-size rigs.
  • Includes small service items (grease, thread locker) in many listings for a clean install.

Colour/Finish: Metal lower with dark wear parts; verify orientation marks during install.

Typical Compatibility

  • Graco Magnum ProX7
  • Graco Magnum ProLTS 17
  • Related Magnum frames using the same 288703 pump spec (see IPL)

For ProX9 / ProLTS 19, use the designated kit noted in your IPL (see note in FAQs).

What This Product Fits

  • Graco Magnum ProX7
  • Graco Magnum ProLTS 17
  • Models whose IPL explicitly calls out “Pump, Complete - 288703”

If your model lists a different complete pump (e.g., 288702 or 16X569), select that exact reference for proper fit.

Technical Specifications

Aftermarket / Replace Replaces Graco 288703
OEM CrossGraco Magnum ProX7 / ProLTS 17 pump assembly
FitsSee “What This Product Fits” and confirm by IPL
TypeComplete lower pump assembly (pre-assembled)
MaterialHardened steel/treated wear components with elastomer seals
FunctionReplaces worn lower; restores prime, sealing, and delivery
PressureFollows sprayer system rating for your model
BrandAftermarket replacement for Graco Magnum series

Confirm voltage variant and model series before purchase; Magnum LTS and ProX use different kit numbers by frame and voltage.

Installation Notes

  1. Relieve pressure, set unit to Prime, lock trigger, and unplug power.
  2. Remove suction tube and lower retaining hardware; note hose routing and yoke link.
  3. Detach the old lower from the drive/yoke; clean mating surfaces.
  4. Mount the new lower pump, align the yoke, and apply thread locker where specified.
  5. Prime with water/solvent, check for leaks, and verify smooth pressure build.

Tip: Inspect inlet strainer and prime/drain valve while the pump is off the frame; replace worn parts to protect the new lower.

When to Rebuild / Replace

  • Persistent hard-to-prime behavior or cavitation noises.
  • Weeping at the intake or drop in holding pressure under load.
  • Noticeable pattern fluctuation after routine seal service.
  • Excessive scoring/pitting observed in the lower.

Bedford vs OEM Comparison

FeatureAftermarket Replacement (288703-spec)OEM (Graco)
Fit & InterfaceMatches OEM geometry for listed Magnum framesFactory assembly per IPL
PerformanceRestores prime/pressure comparable to OEMOriginal equipment performance
AvailabilityIf in stock, ships from Bedford Precision Parts in Bedford Hill, New York.Ships via Graco distribution
ValueCost-efficient service optionOEM program

FAQs

It is specified for Magnum ProX7 and ProLTS 17 frames. Always confirm with your model’s Illustrated Parts List for final verification.
Those frames typically use different complete pump kits (e.g., 288702 for many ProX9/ProLTS 19 120V units or 16X569 for some 240V variants). Check your IPL to be certain.
Listings often include pump lower pre-assembled and small install aids like grease and thread locker; contents can vary by seller—review the listing details.
Prime with water/compatible solvent, inspect for leaks at all joints, confirm smooth pressure build, and flush before coating changeovers.