The Bobcat S650 is a go-to machine for construction, landscaping, and farming, but dirty hydraulic filters can reduce performance and damage the system. This 5-step guide shows you how to swap hydraulic filters yourself, saving hundreds on mechanic fees.
In this guide, we’ll cover:
- Why hydraulic filter replacement is critical for your S650.
- 5 easy steps with tools and parts needed.
- Tips to avoid common mistakes and ensure long-term performance.
- FAQs for quick answers.
Why Hydraulic Filter Replacement Matters for Your Bobcat S650
Hydraulic filters keep the hydraulic system clean by trapping dirt and debris, ensuring smooth operation of the Bobcat S650’s lift arms, bucket, and attachments. According to Bobcat’s maintenance guidelines, replacing hydraulic filters every 400 hours or annually prevents system clogs, reduces wear, and extends component life by up to 25%. With repair costs rising in 2025, DIY maintenance is a cost-effective way to keep your S650 in top shape for heavy-duty tasks like grading or snow removal. This guide targets the S650, a popular model known for its versatility and reliability, helping you avoid downtime and costly repairs.
5 Steps to Replace Hydraulic Filters on a Bobcat S650 Skid Steer
Follow these 5 steps to replace the hydraulic filter on your Bobcat S650. Always consult your S650 operator’s manual for model-specific details and safety precautions, such as parking on a flat surface and wearing gloves.
1. Prepare Your Workspace and Tools
A clean, organized workspace prevents contamination and ensures safety.
Tools Needed:
- Filter wrench
- Drain pan
- Wrench
- Funnel
- Rags
- Safety gloves
Steps:
- Park the S650 on a flat, stable surface and engage the parking brake.
- Lower the lift arms and turn off the engine.
- Gather tools and a new hydraulic filter (shop S650 hydraulic filters).
- Place a drain pan under the hydraulic reservoir to catch fluid.
Pro Tip: Work in a well-ventilated area and keep a spill kit handy for cleanup.
Parts Needed: Hydraulic filter.
2. Drain the Hydraulic Fluid
Draining the fluid makes filter removal cleaner and prevents spills.
Tools Needed:
- Wrench
- Drain pan
- Safety gloves.
Steps:
- Locate the hydraulic reservoir drain plug (under the machine, near the rear).
- Place a drain pan (at least 5 gallons) under the plug.
- Remove the drain plug with a wrench and let the fluid drain completely.
- Inspect the drained fluid for metal shavings or contamination (milky fluid indicates water).
- Reinstall the drain plug and tighten securely.
Pro Tip: Dispose of used hydraulic fluid at a recycling center to protect the environment.
Parts Needed: None (fluid will be reused if clean)
3. Remove the Old Hydraulic Filter
A clogged filter restricts fluid flow, reducing performance and causing wear.
Tools Needed:
- Filter wrench
- Rags.
Steps:
- Locate the hydraulic filter (typically near the reservoir or engine compartment).
- Use a filter wrench to loosen and remove the old filter by turning counterclockwise.
- Place the old filter in the drain pan to avoid spills.
- Inspect the filter housing for debris and clean with a rag.
Pro Tip: Wrap the filter in a rag during removal to catch drips and prevent mess.
Parts Needed: None
4. Install the New Hydraulic Filter
A new filter ensures clean fluid circulation for optimal performance.
Tools Needed:
- New hydraulic filter
- Hydraulic fluid
- Rag
Steps:
- Lubricate the rubber gasket on the new filter with a thin layer of clean hydraulic fluid.
- Screw the new filter into the housing by hand until snug.
- Tighten the filter an additional ¾ turn with a filter wrench (avoid overtightening).
- Double-check the filter for proper seating.
Pro Tip: Buy aftermarket filters for your Bobcat S650 to save money.
Parts Needed: Hydraulic filter
5. Refill Hydraulic Fluid and Check for Leaks
Proper fluid levels and leak-free connections ensure the hydraulic system operates efficiently.
Tools Needed:
- Funnel
- Hydraulic/hydrostatic fluid
- Dipstick or sight glass
Steps:
- Locate the hydraulic reservoir fill port (near the filter housing).
- Refill with Bobcat hydraulic/hydrostatic fluid (approximately 10 gallons, check manual).
- Check fluid levels using the dipstick or sight glass.
- Start the engine and cycle the lift arms and bucket several times to circulate fluid.
- Inspect the filter and drain plug for leaks; tighten if needed.
- Top off fluid if necessary and clean any spills.
Pro Tip: Use only Bobcat-approved fluid to maintain warranty and performance.
Parts Needed: Hydraulic fluid
Tips to Avoid Common Mistakes
- Don’t Overtighten the Filter: Overtightening can damage the gasket, causing leaks.
- Check Fluid Quality: Milky or contaminated fluid indicates water or wear; replace it completely if needed.
- Buy Aftermarket Filters In Bulk: Aftermarket filters from Parts Online give you the same performance for a fraction of the price. Shop S650 hydraulic filters.
- Follow Regular Maintenance Schedules: Replace filters every 400 hours or annually to prevent clogs.
- Work Safely: Wear gloves and ensure the machine is off to avoid injury.
FAQs About Bobcat S650 Hydraulic Filter Replacement
Q: How often should I replace the hydraulic filter on my Bobcat S650?
A: Replace the hydraulic filter every 400 hours or annually, per Bobcat’s guidelines.
Q: What happens if I don’t replace the hydraulic filter?
A: A clogged filter can reduce hydraulic performance, damage components, and cause system failure.
Q: Can I reuse hydraulic fluid after draining?
A: Reuse fluid only if it’s clean and free of contamination. Otherwise, replace it.
Q: Where can I buy aftermarket Bobcat S650 hydraulic filters?
A: Shop high-quality aftermarket filters from Parts Online here.
Q: How do I know if my hydraulic system has a problem?
A: Symptoms include sluggish lift arms, unusual noises, or leaks. Inspect fluid and filters immediately.
Conclusion: Keep Your Bobcat S650 Running Smoothly
Replacing the hydraulic filter on your Bobcat S650 is a quick, cost-effective way to maintain performance and avoid expensive repairs. By following these 5 steps, you’ll ensure your skid steer is ready for any job, from construction to snow removal. Visit PartsOnline.com to shop all the Bobcat S650 parts you need, including hydraulic filters and fluid, with fast shipping and low prices.