EN186543LF ELITE SEAL KIT, REPLACES BELL & GOSSETT 186543LF & 186543

Manufacturer: Elite Replacement Parts

EN186543LF Seal Kit, Replaces Bell & Gossett 186543LF & 186543

SKU: ELITE:EN186543LF

Product Availability: 1

$139.99

This product must be purchased in increments of 1

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EN186543LF Elite Replacement Parts – Seal Kit for Bell & Gossett 186543LF / 186543

Replaces Bell & Gossett 186543LF, 186543, P-63340, #8
1-5/8" I.D. (Buna) Seal Kit for 1510 & 1531 Close Coupled Large Bearing Pumps

The EN186543LF Elite Seal Kit is a premium aftermarket replacement designed for long-lasting, leak-free performance in hydronic, HVAC, and plumbing systems. Constructed with durable Buna (Nitrile), this seal resists water, glycol, and other common system chemicals, making it ideal for residential and commercial large bearing pump applications.

🔑 Key Features

✅ OEM-quality performance at a cost-effective price
✅ Durable Buna (Nitrile) construction for chemical resistance & longevity
✅ Direct replacement for Bell & Gossett 186543LF, 186543, P-63340
✅ Designed for leak-free, long-lasting operation
✅ Compatible with 1510 & 1531 large bearing pumps, bronze fitted or all bronze
✅ Protects pumps from premature bearing and shaft damage

📊 Compatibility Reference Table

Series	Pump Model	Bearing Type	Seal Type
1510	170B55 – 170Y49	Large Bearing	Bronze Fitted / All Bronze
1531	174A02 – 174Z54	Large Bearing	Bronze Fitted / All Bronze

Includes all 1510 & 1531 series large bearing, bronze fitted, and all bronze pumps.

🔁 Replaces OEM Part Numbers

Brand	Part Numbers
Bell & Gossett	186543, 186543LF
Other	P-63340

📊 Elite Seal Kits Comparison Chart

Feature / Part	EN118681LF	EN186499LF	EN186862LF	EN186543LF
Seal Type	Buna (Nitrile)	Buna (Nitrile)	Buna (Nitrile)	Buna (Nitrile)
OEM Replacement	Bell & Gossett 118681LF	Bell & Gossett 186499LF	Bell & Gossett 186862LF	Bell & Gossett 186543LF
Inner Diameter	1/2"	3/4"	1-1/4"	1-5/8"
Pump Series Compatibility	B&G 100, HV, LD, HD, PD, Bearing Assemblies; Armstrong S, H, 1050 Series	1535 / 355S–3511T; Series 90 inline pumps; MF Series 60 pumps	1510 & 1531 small bearing pumps	1510 & 1531 large bearing pumps
Common Uses	Hydronic, HVAC, plumbing systems	Inline and MF pumps, 1.5–5HP, 115–460V	Small bearing pumps, bronze fitted	Large bearing pumps, bronze fitted
Replacement For	B&G 118681, Armstrong 816706-001 / -021, Hydro-Valve RM-880W	B&G 186499, 186499LF	B&G 186862, 186862-LF, 186680	B&G 186543, 186543LF, P-63340
Material	Buna / Nitrile	Buna / Nitrile	Buna / Nitrile	Buna / Nitrile
Key Symptoms	Shaft leaks, bearing noise, reduced flow, corrosion	Shaft leaks, unusual noise, pressure loss	Shaft leaks, bearing wear, performance issues	Shaft leaks, bearing wear, flow issues
Lead-Free	✅	✅	✅	✅

💡 Quick Shopper Tips

EN118681LF – Ideal for older B&G 100 / HV / LD / HD / PD series or Armstrong equivalents
EN186499LF – Best for mid-range inline pumps, MF Series 60, and Series 90 pumps
EN186862LF – Designed for 1510 & 1531 small bearing pumps, bronze fitted or all bronze
EN186543LF – For 1510 & 1531 large bearing pumps, bronze fitted or all bronze

⚠️ Common Symptoms of Seal Failure

✅ Visible water leakage at the pump shaft
✅ Bearing assembly noise or overheating
✅ Loss of pressure or reduced flow performance
✅ Signs of corrosion, wear, or cracked seal faces

❓ Frequently Asked Questions (FAQ)

Q1: Is this seal kit lead-free?
A: Yes, the EN186543LF is manufactured lead-free to meet modern standards.

Q2: Can I use this on both Bell & Gossett and Armstrong pumps?
A: Yes — this kit is a direct replacement for B&G 186543LF and compatible Armstrong equivalents.

Q3: How do I know if I need to replace my seal kit?
A: Look for leaks around the pump shaft, unusual noise, vibration, or reduced performance — these are common signs of seal failure.

Q4: Does it come with installation instructions?
A: Instructions are not included, but standard pump rebuild procedures apply. Service manuals for your pump model provide guidance.