LiftMaster K41-0258-000 Idler Bracket Kit for INSL24UL and IHSL24UL

LiftMaster K41-0258-000 Idler Bracket Kit for INSL24UL and IHSL24UL

The LiftMaster K41-0258-000 is an idler bracket replacement kit for the LiftMaster INSL24UL and IHSL24UL industrial slide gate operator series. The idler bracket is part of the drive chain support and alignment area, so it matters for smooth chain travel, proper tension, and reliable operation. This kit is commonly ordered when the original bracket is bent, worn, damaged, or being replaced during chain drive service. Because chain alignment problems can damage other parts, the operator should be inspected as a complete drive system, not just as one bracket.

This product page is written for buyers replacing a known LiftMaster part number, not for guessing from appearance alone. Many LiftMaster gate operator parts look similar across generations, so the safest ordering method is to match the part number from the original component, the operator parts diagram, or the model-specific service manual.

Compatible With

• LiftMaster INSL24UL industrial lite-duty commercial slide gate operator
• LiftMaster INSL24ULMC industrial lite-duty commercial slide gate operator
• LiftMaster IHSL24UL industrial heavy-duty commercial slide gate operator
• LiftMaster IHSL24ULMC industrial heavy-duty commercial slide gate operator

Also Known As / Related Part Numbers

• K41-0258-000
• LIF-K41-0258-000
• LiftMaster Idler Bracket Kit INSL24UL/IHSL24UL
• Idler Bracket Replacement Kit
• Related parts: K41-0259-000 chain guard, 19-3025 #50 chain, 19-50ML #50 master link

Features and Specifications

Technician Notes

• A bent or loose idler bracket can cause chain tracking problems, uneven wear, noise, or binding.
• Check the chain guard, sprockets, chain, mounting hardware, and gate alignment while servicing this area.
• If the bracket damage was caused by impact or excessive chain tension, correct the root cause before returning the operator to service.

Before Ordering Checklist

• Confirm the operator model and parts diagram call for K41-0258-000.
• Inspect existing idler hardware, chain wear, and sprocket condition.
• Check gate travel and chain tension before and after replacement.
• Confirm the chain guard is present and not damaged.
• Use proper lockout practices before working near the chain drive area.

Professional Advisory

The chain and idler area can move with significant force. Service should be performed with the operator secured and powered down, and all covers and guards should be reinstalled after adjustment.

Product Questions and Answers

What does the K41-0258-000 kit replace?

It replaces the idler bracket assembly area on select LiftMaster INSL24UL and IHSL24UL industrial slide gate operators.

Can a worn idler bracket affect gate travel?

Yes. A damaged or misaligned idler bracket can contribute to chain tracking issues, noise, excessive wear, and travel problems.

Is this kit used on every LiftMaster slide operator?

No. It is associated with the INSL24UL and IHSL24UL series. Other slide operators may use different idler hardware.