How to Select a hydraulic system | DNT Auto Tools

How to Select a hydraulic system when you to buy hydraulic puller

When choosing the proper system for a specific application, several points must be considered:

Puller Reach

Puller reach is the available distance between the pulling surface of the jaw and the jaw head

of the puller. This distance varies and decreases as jaws are opened. When choosing a puller,

make certain the reach is sufficient to attach the puller.

Puller Spread

Puller spread is twice the distance from the ram to the pulling surface of the jaw. In choosing

the proper puller make certain the puller has a large enough spread to attach to the object

being removed.

Tonnage

Tonnage is the maximum pulling force that can be safely exerted by the puller. Tonnage may

be estimated by looking at the torque curves. The maximum force exerted in tons should

be seven to ten times the diameter of the shaft in inches. IE: a 1.5 inch diameter shaft

would generally require a 15-ton hydraulic puller.

Pump

The pump must have the adequate oil output and reservoir capacity to power the cylinder.

How to Select a hydraulic system when you to buy hydraulic puller | DNT Auto Tools FAQ: How to Select a hydraulic system when you to buy hydraulic puller

How to find a right puller | DNT Auto Tools FAQ

How to find a right puller | DNT Auto Tools FAQ: How to find a right puller

-What are you trying topull? Are you trying to pull a shaft out of something, pull something out of a hole or pull something off a shaft? This will help you determine if you need a push-puller, jaw-type puller, slide hammer or one with internal or external-internal adapters.

-Determine the reach and spread you need. This will make sure your puller is long enough and the jaws, if applicable, open wide enough to exert enough force to pull the object.

-Estimate the force required. Normally, if you account for reach and spread, DNT’s pullers will have enough force. When in doubt, always use the next larger size to account for frozen or rusted parts. 

Now that you’ve determined what you’re trying to pull, find a corresponding puller to finish the job. 

-If you’re pulling something off a shaft, you can use a jaw-type, push-puller, slide hammer or bearing puller with attachment. 

This includes removing a gear, bearing, wheel or pulley

-If your job includes pulling something out of a hole, look for internal pulling attachments coupled with a slide hammer or a push-puller.

This option helps remove internal bearing cups, retainers or oil seals that are press-fitted

-When you need to pull a shaft out of something, look for threaded adapters, internal or external, for use with slide hammers or a push-puller.  

Typically you need these pullers when removing a transmission shaft or pinion shaft from a bore or housing. 

Regardless of puller selected, always keep the tool clean and frequently lubricate the forcing screw fully to extend the tool’s life. With tons of force, we can’t stress safety enough when using pullers. Before using one of our pullers, we recommend reading the DNT safety puller information sheet, found here.