Moses Ludel’s 4WD Mechanix Magazine – HD Video Tool How-to: Using the OTC 7394 Hub Puller

HD Video How-to:  OTC 7394 Hub Puller for Jeep and Truck Axle Service!

Vintage Jeep 4x4s and AMC/Jeep CJ models with the AMC Model 20 rear axle require a special hub puller to remove the rear wheel hubs. Many vintage cars and trucks require this type puller. OTC makes the 7394 Hub Puller for this task. This HD video demonstrates how to remove  rear brake drums and hubs as an assembly. The OTC puller and 6574-1 adapter plate provide a solution that helps prevent parts damage and personal injury!

OTC 7394 Hub Puller Set
Wing wrench or impact socket option

     Vintage axles have tapered axle shafts.  Jeep, Ford, Chrysler, Studebaker, I-H and others used keyed axle hubs. The wheel hub seats tightly on the axle shaft. The only way to properly remove these hubs is with a quality tool set like the OTC 7394 Hub Puller. U.S.A.-made with impact tool grade steel, this puller can be used with its winged wrench and a hammer or an impact socket and air impact wrench.

Wing wrench is hammer driven.
Strike stem with sharp hammer

     At left is the wing wrench approach. Hub arms secure, the wing attaches to the hex head of the threaded stem. Hammer blows on the wing edges will rotate the stem. At right, a sharp rap with the hammer will relieve tension created by the tightened stem. The idea is to “rap” sharply on the stem end; do not beat on the stem!  Too much hammer force on the stem end can damage the axle shaft bearing or cause other kinds of damage to the axle.

Axle shaft ruined by beating on end with hammer!
Removing hub and drum from axle shaft properly.

     The axle shaft at left was ruined by someone who did not have the proper puller tool! After being beaten to the point of ruin, the hub still remained firmly attached to the tapered axle shaft. At right is the correct way to remove the hub and brake drum, as seen in the HD video (above). 

OTC 6574-1 Universal Puller Plate adapter
OTC 8034 Chrysler ball joint tool

     At left, the OTC 6574-1 Universal Adapter Plate allows use of the OTC 7394 Hub Puller on smaller bolt circle wheel hubs. At right is the OTC 8034 socket for Chrysler and Dodge truck ball joint removal and installation. Larger 2-9/64″ square head ball joints require a tool like this special impact grade, U.S.A. made socket. It you see a square head on a Chrysler ball-joint, it’s threaded—do not press out!

OTC 8034 Chrysler ball joint impact grade socket
Threaded Chrysler style ball joint

     The OTC 8034 socket fits larger Chrysler square-head ball joints. The larger application is 2-9/16″ square size and fits bigger and older Chrysler cars and Dodge truck ball joints. There is also a smaller square size socket available from OTC for smaller Chrysler ball joints.

Chrysler threaded ball joint control arm
Installing the ball joint with OTC 8034 ball joint tool

     At left is the control arm end with factory threads. When removing and installing these ball joints, use the right tool, like this high quality, impact grade OTC 8034 socket. Make sure you have the right size socket(s) for the ball joints. Always use caution when installing a ball joint—do not cross-thread the joint in the control arm threads!  Torque the ball joint to specification and make sure the joint seats properly.