The Piper part number 587 600 refers to a specific suspension component used in various Piper aircraft models. This suspension part plays a critical role in the landing gear system, absorbing impact during takeoffs and landings and ensuring a smooth ride on the ground. Understanding the specifications, compatibility, and maintenance requirements of this part is essential for aircraft owners, mechanics, and enthusiasts looking to keep their Piper aircraft in optimal condition.
What Is Piper Part 587 600?
Piper part 587 600 is a suspension strut or shock absorber component designed for the landing gear of certain Piper airplanes. It is part of the oleo-pneumatic or spring-based suspension system that dampens vertical loads and reduces stress on the airframe during ground operations. This specific part number may correspond to a complete assembly or a replacement cartridge, depending on the aircraft model and service manual.
The suspension unit typically consists of a cylinder, piston, seals, and internal fluid or gas chambers that work together to absorb energy. Over time, seals can wear, fluid can leak, and internal components can degrade, requiring replacement to maintain safe landing gear performance.
Function in the Landing Gear System
The primary function of the 587 600 suspension is to control the compression and rebound of the landing gear. When an aircraft touches down, the suspension compresses to absorb the vertical energy, then extends smoothly to keep the wheels in contact with the runway. Without a properly functioning suspension, the aircraft would experience harsh landings, increased wear on other landing gear parts, and potential structural fatigue.
Piper Aircraft Models Using Part 587 600
Part 587 600 is commonly associated with the following Piper models:
- Piper PA-28 series (including Archer, Warrior, Cherokee)
- Piper PA-32 series (Saratoga, Six, Lance)
- Piper PA-34 Seneca
- Some early PA-44 Seminole variants
Compatibility can vary based on the specific year, serial number, and modifications. Always consult the aircraft’s parts manual or a certified mechanic to confirm fitment before purchasing.
Cross-Reference with Other Part Numbers
Piper often supersedes or replaces part numbers. The 587 600 may be cross-referenced with:
- 587 601 (similar unit with updated seals)
- 587 602 (heavy-duty variant for higher gross weight operations)
- 763 453 (alternative aftermarket equivalent)
If the exact part number is not available, these alternatives might be acceptable after checking compatibility.
Installation Considerations
Replacing the suspension on landing gear requires adherence to manufacturer specifications and proper safety procedures. Below are key points for installation.
Tools and Equipment Needed
- Jack stands or aircraft jacks
- Torque wrench
- Seal installation tool (if replacing seals)
- Hydraulic fluid (MIL-H-5606 or equivalent)
- Nitrogen tank (for oleo-pneumatic units)
Step-by-Step General Procedure
- Jack the aircraft at the designated jack points to lift the landing gear off the ground.
- Remove the wheel and tire to gain access to the suspension unit.
- Disconnect the brake line (if applicable) and any electrical connections (e.g., from the wheel speed sensor).
- Unscrew the retaining bolts or snap rings securing the suspension strut.
- Extract the old unit – note the orientation and any shims or spacers.
- Inspect the mounting points for corrosion or damage; clean thoroughly.
- Install the new suspension: apply anti-seize to threads, torque bolts to spec, and install any shims in the same position.
- Recharge with fluid and nitrogen to the pressure listed in the maintenance manual.
- Reassemble wheel, tire, brakes, and connections.
- Lower the aircraft and test by cycling the gear or performing a taxi check.
Always refer to the specific Piper service manual for your model before attempting installation. Torque values and fluid pressures vary.
Common Installation Mistakes
- Over-tightening bolts – can damage the housing or cause premature seal failure.
- Incorrect fluid or gas pressure – leads to harsh landings or bottoming out.
- Ignoring wear on mounting pins – worn pins will quickly destroy the new suspension.
- Not replacing seals – if the old unit leaked, new seals may be needed; some replacement units come pre-assembled with seals already installed.
Maintenance and Service Life
The Piper part 587 600 suspension is a wear item. Service life depends on flight hours, landing conditions (paved vs. grass runways), and maintenance practices. Typical intervals for inspection:
- Annual inspection: visual check for leaks, cracks, or deformation.
- Every 100 hours: check fluid level and condition; top off if needed.
- Overhaul at 10 years or 2000 landings: depending on usage.
Signs of Wear
- Oil streaks on the strut – indicates seal leakage.
- Lower ride height – the suspension may have lost internal pressure.
- Clunking or squeaking during taxi – possible loose internal parts.
- Uneven tire wear – can be linked to improper suspension damping.
If any of these signs appear, inspect the suspension promptly and replace if necessary.
Aftermarket and Alternative Options
While Piper’s OEM part 587 600 is the standard choice, aftermarket manufacturers produce compatible units that may offer improved durability or lower cost. Examples include:
- Cleveland Wheels & Brakes – offers equivalent struts for some models.
- Lordan – specialized in aircraft landing gear components.
- Rapco – manufactures replacement suspensions for general aviation.
When considering aftermarket parts, verify that they meet FAA-PMA or TSO standards for safety and quality. Do not assume all aftermarket parts are direct replacements; always check dimensions, mounting points, and operating specifications.
Practical Recommendation
For most Piper aircraft owners, the safest approach is to use the OEM Piper part 587 600 or a PMA-approved equivalent. If you are performing the replacement yourself, ensure you have the correct service manual and follow torque and pressure specifications to the letter. For those less experienced, hiring an A&P mechanic is strongly advised, as improper installation can lead to serious handling issues or landing gear collapse.
Before ordering the part, confirm compatibility with your specific aircraft through the serial number or parts catalog. It can also be helpful to inspect the old suspension to determine if any additional components (such as mounting hardware or bearings) need replacement. Investing in quality landing gear suspension ensures safer landings and extends the life of your Piper aircraft.