Graco 158891 Piston Stud
$85.25
In Stock
The Graco 158891 Piston Stud is a genuine OEM part designed for Graco displacement pumps. Ensures proper piston alignment and reliable pump performance.
- Part Number: 158891
- Type: Stud, Piston
- Compatible Models: 205585, 205584, 203367
- Manufacturer: Graco
- Torque Spec: 20‑30 ft‑lb (27‑41 N·m)
Quantity
Genuine OEM Part
Fast Shipping (Order by 1 PM CST)
Easy Returns
Compatible Equipment for the GRACO 158891 Piston Stud
This replacement part — the GRACO 158891 “Stud, Piston” — is used in certain displacement‑style pumps manufactured by Graco. It is referenced as Ref. No. 107 in the displacement pump assembly of compatible machines.
| Machine Model | Series | Description |
|---|---|---|
| 205585 | D | 5 Gallons Duo Paint Sprayer pump assembly includes part 158891 |
| 205584 | A | 5 Gallons Duo Paint Sprayer pump assembly includes part 158891 |
| 203367 | B | Displacement Pump (Ref. 107 = part 158891) |
Product Overview
| Specification | Details |
|---|---|
| Part Number | 158891 |
| Description | Stud, Piston (also listed as “Body, Piston”) |
| Manufacturer | Graco |
| Torque | 20‑30 ft‑lb (27‑41 N·m) |
| Function | Mounts piston assembly inside the displacement pump, ensures proper alignment |
Frequently Asked Questions
If the stud is worn, bent, or improperly torqued, the piston assembly may mis‑align, leading to fluid leakage, pump inefficiency, or premature wear of the piston, cylinder, or packing components.
It is strongly recommended to use the exact part number listed in your machine’s parts diagram. Using a non‑specified part can compromise performance or safety.
Installation is straightforward for qualified maintenance technicians. After relieving system pressure, unscrew the old stud, remove the piston and washers, install the new stud, and torque it to the correct value (20‑30 ft‑lb). Refer to the manufacturer’s instructions.
No reviews yet. Be the first to review this product!
