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Bobcat Hydraulic Lift Cylinder Seal Kit 7137939 Fit T650 S650 S770 S300 T630

Bobcat Hydraulic Lift Cylinder Seal Kit 7137939 Fit T650 S650 S770 S300 T630

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Complete hydraulic lift cylinder seal kit for Bobcat skid steer loaders. Includes all necessary seals and O-rings to repair hydraulic cylinder leaks and restore full lift performance. Fits the lift cylinder with 1-5/8" rod and 3" bore across a wide range of Bobcat A, S, and T-series models.

Specs: Rod diameter: 1-5/8" · Bore diameter: 3"

OEM Part Numbers: 7137939 · 6816536

Ships same-day on orders placed before 3 PM PST. Free shipping. 30-day returns.

Not sure it fits? Call (818) 261-3896

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COMPATIBILITY

Fits These Bobcat Skid Steer & Track Loader Models

✓ Bobcat A300 Skid Steer
✓ Bobcat A770 Skid Steer
✓ Bobcat S250 Skid Steer
✓ Bobcat S300 Skid Steer
✓ Bobcat S330 Skid Steer
✓ Bobcat S630 Skid Steer
✓ Bobcat S650 Skid Steer
✓ Bobcat S750 Skid Steer
✓ Bobcat S770 Skid Steer
✓ Bobcat T300 Compact Track Loader
✓ Bobcat T320 Compact Track Loader
✓ Bobcat T630 Compact Track Loader
✓ Bobcat T650 Compact Track Loader
✓ Bobcat T750 Compact Track Loader
✓ Cylinder Specs: 1-5/8" Rod · 3" Bore
✓ OEM#: 7137939 · 6816536

WHAT'S INCLUDED

Complete Seal Kit — Everything to Fix the Leak

⭕
All Seals & O-Rings
Complete set for lift cylinder
🔩
Wiper Seal
Keeps contaminants out
🔧
Piston Seal
Restores full hydraulic pressure
🛡️
30-Day Warranty
Arko quality guarantee
✅
QC Inspected
Checked before shipping
🚚
Same-Day Shipping
Order before 3 PM PST

WHEN TO REPLACE

Signs Your Bobcat Lift Cylinder Seals Are Failing

Rebuild your Bobcat lift cylinder immediately if you notice:

⚠️ Hydraulic fluid leaking from the lift cylinder
⚠️ Loader arms drifting down when raised and held
⚠️ Slow or weak lift under full load
⚠️ Hydraulic fluid level dropping consistently
⚠️ Visible oil film or streaking on cylinder rod
⚠️ Bucket or attachment won't hold position under load

CUSTOMER REVIEWS

Trusted by Tractor Owners Nationwide

★★★★★ 4.6 out of 5 stars (927 reviews)
★★★★★
Perfect Fit
VERIFIED REVIEW

"Exact replacement for my Ford 4600. Installed in 20 minutes and tractor fired right up. Quality part at a great price. Will order from Arko again."

Mike T. • Verified Buyer • March 2026
★★★★★
Fast Shipping & Great Support
VERIFIED REVIEW

"Ordered Monday morning, received Wednesday. Called with a fitment question and spoke to someone who actually knew tractors. Part works perfectly on my Kubota."

James R. • Verified Buyer • March 2026
★★★★★
Better Than OEM
VERIFIED REVIEW

"This gasket kit saved me hundreds compared to dealer pricing. Quality is excellent, everything fit perfectly. No leaks after 50+ hours of operation."

David L. • Verified Buyer • February 2026

FAQ

Common Questions

How do I know if this is the lift cylinder kit or the tilt cylinder kit for my Bobcat S300?

This kit (7137939) is specifically for the lift cylinder — the cylinder that raises and lowers the loader arms. It is sized for a 1-5/8" rod and 3" bore. Arko also carries separate tilt cylinder seal kits for Bobcat. If your leak is on the cylinder connected to the bucket/attachment angle, that's the tilt cylinder and you'll need a different kit. Call (818) 261-3896 if you're unsure which cylinder is leaking.

Does this kit include everything I need or do I need to buy additional seals separately?

This is a complete kit. It includes all seals, O-rings, wiper seals, and piston seals needed for a full lift cylinder rebuild. You do not need to purchase any additional seal components — just clean cylinder surfaces, new hydraulic fluid, and basic hand tools.

My Bobcat S650 loader arms drift down slowly when I hold them up — is that definitely the cylinder seals?

Arm drift under load is the most common symptom of worn piston seals inside the lift cylinder. Hydraulic fluid bypasses the piston seal instead of holding pressure, causing the arms to slowly sink. A seal kit rebuild will restore proper cylinder pressure and stop the drift. If the arms drop rapidly or the machine won't lift at all, also check your hydraulic pump and control valve before assuming it's only the seals.

What's your return policy

We offer free returns within 30 days if the part doesn't fit or you're not satisfied. Parts must be unused and in original packaging.

Do you offer technical support?

Yes. Call (818) 261-3896 and we'll help you confirm fitment, answer installation questions, or troubleshoot issues.

How long does shipping take?

Orders ship same-day if placed before 3 PM EST. Standard delivery is 3-5 business days.

Stop the Leak. Restore Full Lift. Ships Same Day.

Complete hydraulic lift cylinder seal kit for Bobcat S250–S770, T300–T750, A300, A770. 1-5/8" rod, 3" bore. OEM# 7137939, 6816536. Includes all seals and O-rings. Free shipping. 30-day returns.

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📞 Questions? (818) 261-3896