Service Instructions:
Hubs should be serviced at same time as wheel bearings. Clean and coat with motor oil. The hubs should never be
packed with grease. We recommend checking wheel bearing adjustment and locknut torque to be sure they are
within vehicle manufacturer’s specifications. We recommend to engage hubs for at least one mile monthly. If the
body assembly requires service, disassemble and clean. Put a light coat of bearing grease on the axle gear. When
the cam assembly is put back together, ensure it is aligned with the cap screw holes as shown below.
Never drive with one hub only engaged, as this can damage the front differential.
Never drive unless the control dials are in either fully locked or fully free position. If the hubs are partially engaged,
hub damage may result.
2-Wheel Drive:
Both control dials set in FREE position and transfer case in 2-wheel drive.
4-Wheel Drive:
Set both hubs to lock and shift transfer case to 4-wheel drive. DO NOT drive on pavement
or other hard surface roads in LOCK, this can result in severe binding up and damage of
the gear train.
Operating Instructions:
Warranty Information:
Mile Marker Industries warrants directly to the first purchaser that Mile Marker Locking Hub Part Numbers 104, 302, 420, 423, 430, 432, 435,
449SS, 459SS, 457, 466, 470, 481, and 490 will be free from defect in material and workmanship appearing under normal use and service for
as long as said purchaser owns the locking hub. Warranty registration cards for each product must be submitted within 30 days by the end user,
or online at www.MileMarker.com/warranty. If you discover a hidden defect, Mile Marker will, as its option, repair or replace the product or nec-
essary replacement parts at no charge to you, provided you remove the product from the vehicle and return it prepaid to Mile Marker Industries.
If the product was purchased in the United States, the owner must contact our warranty department to get a Return Goods Authorization (RGA)
number before returning the product. If the product was purchased outside the United States, the owner must return the product to the original
place of purchase.
PREMIUM LOCKING HUBS
Part Number 449SS
PAGE 2
2121 Blount Road, Pompano Beach, FL 33069 www.MileMarker.com 1.800.886.8647
Ensure cam is aligned
as in diagram
Ensure pin is aligned
as in diagram
