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Graco 164231 Connecting Rod

The Graco 164231 Rod, Connecting is an OEM linkage that maintains correct pump stroke and alignment. Use it when the original rod is bent, scored, or causing erratic operation.

  • Part: 164231 – Rod, Connecting
  • Fits: Fire-Ball 425 (50:1) – model 205395 (Series N)
  • Ref. Length: ~19-13/32″ (≈493 mm)
  • Function: Links air-motor piston to fluid-piston assembly
  • Check Before Buy: confirm model/series; some variants use 164234

Retail Price: $288
You save: $22.32 (7.75%)
Our Price: $265.68
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Key Details & Compatibility

The Graco 164231 Rod, Connecting is an OEM linkage used inside select Graco grease/industrial piston pumps to transmit motion between the air-motor piston and the fluid pump assembly.

Compatible Machines

Confirmed fit based on OEM parts breakdowns:

  • Graco Fire-Ball 425 (50:1) – Pump Model 205395 (Series N) — verified use of 164231 Rod, Connecting.

Quick Specifications

Attribute Detail
Part Number 164231
Description Rod, Connecting (pump linkage component)
Typical Application Linkage between air motor piston and fluid piston in select Graco grease pumps (e.g., Fire-Ball 425 model 205395).
Reference Length ~19-13/32″ (≈493 mm) noted for use with model 205395.
Related/Alternate 164234 (shorter connecting rod used on other variants; verify before purchase).

Why Choose the OEM Part

  • Maintains correct pump stroke and alignment for reliable output.
  • Reduces wear on pistons, packings, and bearings versus non-spec parts.
  • Direct-fit replacement for supported models; no modifications required.

When to Replace

  • Visible bending, scoring, or pitting on the rod surface.
  • Shortened/erratic stroke or unusual vibration during operation.
  • Excessive play at connection points or accelerated packing wear.

Fitment & Install Notes

  • Match model, series, and rod length to the OEM manual before ordering.
  • Inspect associated pins, bushings, and fasteners; replace worn items together for best results.
  • Lubricate per OEM spec during assembly and verify free travel through full stroke.

Frequently Asked Questions

Not guaranteed. The 164231 is confirmed for model 205395 (Series N). Other Fire-Ball 425 variants may use a different connecting rod (e.g., 164234). Check your pump’s model/series plate or OEM manual before ordering.

Look for bent or scored rod surfaces, excessive play at joints, shortened/erratic stroke, abnormal vibration, or premature packing wear. Replacing with the correct OEM rod restores proper stroke and alignment.

It’s good practice to inspect associated pins, bushings, fasteners, and packings. If any are worn, replace them at the same time to avoid repeat teardown and to maintain alignment and seal integrity.

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