Graco 166075 – PTFE Vee Packing
Compatible Machines
Fits Graco pump lowers/displacement assemblies that specify this part in their OEM parts list. Always verify by model and serial number before ordering.
- Any Graco airless/industrial pump lower that calls for part number 166075
- Also referenced in some older documents as 166-075
Overview & Key Details
The PTFE vee-style packing provides a reliable high-pressure seal around the pump rod, helping prevent fluid bypass, stabilize pressure, and extend pump life.
Specs
| Part Number | Graco 166075 |
| Description | Vee packing (single ring), PTFE |
| Material | Polytetrafluoroethylene (PTFE) |
| Primary Function | Seals around piston/rod in the lower to maintain pressure and reduce leakage |
| Interchange/Notes | May appear as 166-075 in legacy literature; install with lips oriented per service manual |
Installation & Service Tips
- Depressurize and flush the sprayer prior to disassembly.
- Inspect rod and cylinder surfaces; replace worn glands and stack components as specified.
- Orient vee lips correctly for your model (refer to the machine’s parts/service manual).
- After reassembly, test at low pressure and check for leaks before returning to service.
Frequently Asked Questions
Check your unit’s OEM parts diagram. If the parts list explicitly calls out 166075 in the lower/packing stack, it is the correct packing. When in doubt, provide your model and serial number for verification.
This listing is for an individual PTFE vee packing ring. Some models require multiple rings and adjacent components (glands, spacers) to complete the stack.
Only if the OEM stack design specifies it. Many stacks combine PTFE with other materials for lubrication and sealing; follow the exact order and count shown in your manual.
Visible fluid at the rod, loss of pressure, erratic spray pattern, or frequent need to tighten the packing nut are common signs of wear.
