Parker Denison T67DB T67DBW fixed displacement hydraulic pump

Fixed displacement pumps deliver a consistent volume of fluid per revolution. Unlike variable pumps that adjust output based on demand, the T67DB series provides predictable flow directly proportional to input speed. This makes it ideal for:

Open-loop systems with constant-running actuators

Circuits requiring fixed, repeatable speeds (e.g., conveyor drives)

Backup or emergency hydraulic units

T67DB vs. T67DBW – What’s the Difference?

While both share the same robust internal cartridge kit, the suffix changes the mounting and shaft configuration.

Pro tip: Always verify your existing drive coupling’s SAE size. The T67DBW’s larger flange reduces face loading in vibration-prone applications.

Real-World Applications (With Examples)

Mobile Equipment – T67DBW

Case: A mid-size wheel loader needs steering + implement lift.

The T67DBW mounts directly to the engine’s SAE C PTO. Its 4-bolt flange withstands torsional vibrations. Output drives a priority flow divider: 30% to steering, 70% to lift/tilt. No overheating even after eight hours of loading trucks.

Industrial Machinery – T67DB

Case: A 200-ton injection molding machine’s core pull circuit.

Two T67DB pumps run in tandem. One provides low-flow/high-pressure for core holding; the other delivers high-flow for fast clamp movement. Fixed displacement ensures consistent cycle times without electronic feedback.

Marine Steering Systems

Case: Tugboat bow thruster controls.

A single T67DBW (with marine coating optional) powers four steering actuators simultaneously. The predictable flow prevents “jerky” steering during heavy seas.

Installation & Maintenance Best Practices (Expert Checklist)

1.Shaft alignment – Misalignment by as little as 0.25 mm halves bearing life. Use a dial indicator.

2.Inlet conditions – Maximum vacuum: 0.4 bar absolute. Use a 100-mesh suction strainer, not a filter (risk of cavitation).

3.Case drain – Must run unrestricted to tank. Never plug or restrict – seal blow-out will occur.

4.First start-up: Fill case with clean oil. Run at no-load for 2 minutes. Then gradually apply pressure.

Common mistake: Using a T67DB (2-bolt) on an engine with frequent load reversals. The smaller flange loosens over time. Upgrade to the DBW version for such duty cycles.

For more information on the T67DB T67DBW hydraulic vane pump, please visit https://www.baolilaihydraulic.com/product/.

Selection Table

Q1: What is the expected service life under normal conditions?

A1:12,000–15,000 hours with ISO VG 46 clean oil (ISO 4406 18/16/13 or better). Vane tip wear is the usual end‑of‑life mode.

Q2:How do I know if my T67DB is cavitating?

A2: Listen for a “gravel” or “marbles” sound. Also, check for milk‑colored oil (aerated) and erratic pressure gauge readings. Fix by increasing inlet line size or lowering fluid viscosity.

Q3:How to purchase a T67DB/T67DBW hydraulic pump?

A3:You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.

Q4:What is the price and delivery time of the T67DB/T67DBW hydraulic pump?

A4:The specific price and delivery time will be provided based on the specific model you provide.