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  1. Back Up Alarm
  2. Pollak
  3. Surface Mount
  4. Self-Cleaning
  5. Voltage Spike-Protected
  6. 107 Decibels
Medium-Duty to Heavy-Duty Back-Up Alarm - 12" Wire Leads - Self-Cleaning - 12-24 Volts - 107 dB

Medium-Duty to Heavy-Duty Back-Up Alarm - 12" Wire Leads - Self-Cleaning - 12-24 Volts - 107 dB

Item # PK41851
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Retail:$124.50
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Back Up Alarm
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Shipping Weight: 1.24 lbs
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Medium- to heavy-duty back-up alarm for use on off-highway trucks, dump trucks, loaders, cranes, backhoes, etc. Patent-pending dome speaker has self-cleaning feature to expel contaminants, such as concrete dust. 107dB single sound level. Call 800-298-1624 to order Pollak back up alarm part number PK41851 or order online at etrailer.com. Free expert support on all Pollak products. Guaranteed Lowest Price and Fastest Shipping for Medium-Duty to Heavy-Duty Back-Up Alarm - 12" Wire Leads - Self-Cleaning - 12-24 Volts - 107 dB. Back Up Alarm reviews from real customers.
  • All Info
  • Reviews (3)
  • Q & A (0)
  • Photos
  • Why etrailer?

Pollak Back Up Alarm - PK41851

  • Surface Mount
  • Self-Cleaning
  • Voltage Spike-Protected
  • 107 Decibels
  • Medium Volume
  • Pollak
  • 12V
  • 24V
  • 0.3 amp

Medium- to heavy-duty back-up alarm for use on off-highway trucks, dump trucks, loaders, cranes, backhoes, etc. Patent-pending dome speaker has self-cleaning feature to expel contaminants, such as concrete dust. 107dB single sound level.


Features:

  • Meets extreme requirements of off-highway equipment
  • Rugged, glass-filled nylon housing
  • Self-cleaning feature (patent pending) expels contaminants, such as concrete dust
  • Steam-cleanable or pressure-washable
  • Low-current, high-efficiency dome speaker
  • Can be used on positive- and negative-ground vehicles
  • Voltage spike-protected
  • Reverse polarity-protected
  • Solid-state electronics
  • Conforms to SAE J994 type B
  • Meets state, federal, OSHA, Bureau of Mines, and US Army Corps of Engineers' requirements
  • Meets all European standards for on- and off-road vehicles (CE & E-Mark certified)


Specs:

  • Applications: light- to medium-duty vehicles where a louder warning level is required
  • Dimensions: 5" wide x 3.25" deep x 3" tall
  • Wire Leads: 12"
  • Mounting: (2) slots 0.75" long x 0.25" wide and (2) slots 1" long x 0.25" wide on 4.25" centers
  • Net weight: 1.2 lb
  • Sound level: 107dB(A) +/- 4 @ 4'
  • Voltage: 12 to 24 volts
  • Current draw: less than 0.3 amp
  • 1-Year limited warranty


41-851 Medium Duty to Heavy Duty Backup Alarm - 12 Inch Wire Leads - Self Cleaning - 12 to 24 Volts - 107 Decibels

Replaces 41-751






Customer Reviews

Medium-Duty to Heavy-Duty Back-Up Alarm - 12" Wire Leads - Self-Cleaning - 12-24 Volts - 107 dB - PK41851

Average Customer Rating:  5.0 out of 5 stars   (3 Customer Reviews)

Medium- to heavy-duty back-up alarm for use on off-highway trucks, dump trucks, loaders, cranes, backhoes, etc. Patent-pending dome speaker has self-cleaning feature to expel contaminants, such as concrete dust. 107dB single sound level.

- PK41851
by:

This back-up alarm has held up well over the last year. It is heavy duty in its construction and holds up to the rigors of a fire truck in the field. It is definitely loud enough to get peoples attention. It was easy to install and I am very satisfied with it!



- PK41851
by:

New to us, first time using. Easy to install. Hoping the self cleaning feature will preform better than the ones we have been using.



- PK41851
by:

Excellent product and super speedy delivery, in fact I'm placing another order for 3 more back up beepers today. Thanks etrailer, you have never let me down.


3
3

Ask the Experts about this Pollak Back Up Alarm

  • Could Medium-Duty to Heavy-Duty Back-Up Alarm # PK41851 be Wired to LED Reverse Light Circuit
    There's no reason you could wire the backup alert part # PK41851 that you referenced to a reverse light circuit that is used to power an LED light. This only draws .3 amp so it wouldn't over draw the circuit either.
    view full answer...
  • Heavy Duty Back Up Alarm Recommendation for Vehicle
    For an HD back up alarm you would want the Pollak Heavy-Duty Back-Up Alarm # PK41761 that is adjustable from 97 dB to 112 dB. For a switch you would want the part # D16740 and then to install it you would just need to run a power wire to the switch and then to the alarm and then ground the ground post of the alarm. You will need to mount the alarm underneath your vehicle pointing to the rear for maximum effect. We don't have specific instructions but it would basically be having to mount...
    view full answer...
  • Back Up Alarm Recommendation for 2007 GMC Yukon XL
    The back up warning bulbs we offer are a replacement for the 3156 bulb, and your Yukon XL uses a different bulb. We do however have back-up alarms that will beep loudly when your vehicle is shifted into reverse. I'd recommend the Pollak Back Up Alarm, part # PK41851. The alarm would wire into the reverse lamp circuit of your Yukon, and would sound when the vehicle transmission is shifted into reverse. Its 107 decibel horn would be easily audible on a loud and chaotic jobsite.
    view full answer...
  • Will Hopkins Replacement 3156 Bulb with Audible Backup Alert Fit 2007 GMC Yukon XL
    According to my research your 2007 GMC Yukon XL uses a 7440 type bulb for its reverse lights. The Hopkins Bulb with Audible Backup Alert # HM20101VA is a replacement for a different bulb type, a 3156 bulb. This item is not compatible with your vehicle lighting. We do not have a bulb with alarm in the 7440 type. However, we do offer a backup alarm that can be wired into your Yukon XL's reverse light circuit. Part # PK41851 from Pollak is a 2-wire hookup and can deliver sound pressure levels...
    view full answer...
  • Looking for Quality, Long-Lasting Backup Alerts
    The Hopkins Backup Alert # HM20101VA is made overseas and is designed more for occasional consumer use rather than on vehicles that back up frequently. For a serious backup alert I recommend the Pollak Heavy-Duty Back-Up Alarm # PK41761. Not only does it conform to SAE J994 types A, B, & C standards but it also meets state, federal, OSHA, Bureau of Mines, and US Army Corps of Engineers' requirements. A step down from it is # PK41851 which conforms to SAE J994 type B only and state, federal,...
    view full answer...
  • Recommended Backup Alert for 2017 Ram 1500 Laramie Longhorn
    The Hopkins Backup Alert - Replacement 3156 Bulb with Audible Alert # HM20101VA is not a fit for your 2017 Ram Laramie Longhorn 1500 Crew Cab 4x4. For an audible alert you can use the Light-Duty to Medium-Duty Back-Up Alarm with Wire Leads # PK41822, the medium to heavy-duty # PK41851, or the integrated alarm in the Curt Trailer Connector Adapter with Backup Alarm - 4-Way to 7-Way RV and 4-Way Flat # C57102. Let me know if you need other options, but unfortunately we don't have a...
    view full answer...
  • Does Surface Mount Back-up Alarm # BK97DB Include Wiring
    The wiring is not included with Surface Mount Back-up Alarm # BK97DB. We have others that do have wiring attached such as # PK41820, # RVS-W02, # PK41851, and # PK41822.
    view full answer...

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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Written by:
Laura H
Employee Chris R
Video by:
Chris R
Employee Adam E
Installed by:
Adam E

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