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Model 3 Bender Hydraulic Adapter Assembly
Adapter Components:
Excluding the hydraulics:
Hydraulic Swivel Block
Yoke
Threaded Extension Rod
Clevis Pin
Recommended Cylinder:
Enerpac RC1014 or the O.T.C. (Power Team) Part# C1014C or an equivalent cylinder. These porta-power cylinders are rated
at 10 tons and have a 14" stroke. On the front of the cylinder is a 2 1/4" x 14 TPI thread.
Recommended Power Unit:
We offer several hydraulic pumps suitable for the Model 3 Bender. However, any power unit may be used that has an output
of at least 1500-2500 PSI. The average bending pressure will generally be below 1300 PSI. Tested examples: 1 3/4" x .095"
mild steel - 800 PSI, 1 5/8" x .083" 4130 chromemoly - 1300 PSI, 1 1/2" solid round bar stock - 3100 PSI. Note that the air-
over-hydraulic 10,000 PSI pumps deliver less volume and therefore bend slower than the air-over-hydraulic 3,000 PSI pumps.
A pressure gauge is highly recommended. If the bender is operated at a pressure higher than 2500 PSI the followbar pin may
bend. This pin has been designed to be the bender’s weak link and therefore acts as a warning indicator of over loading. In other
words, if you bend the followbar pin, STOP BENDING IMMEDIATELY. For safe reliable operation do not operate the bender at
pressures above 2500 PSI.
Assembly:
Remove the outer 3/4" bolt, sleeve and ratchet assembly from the bender’s frame. Notice that through the hydraulic swivel
block is machined a 2 1/4" x 14 TPI thread and a slight shoulder. The shoulder should face away from the drive links towards the
rear of the cylinder. This will allow the cylinder to be screwed all the way flush with the swivel block's front. Place the previously
removed 1" OD sleeve into the cylinder swivel block. Using the 3/4" bolt, nut and washers, install the Swivel block into the bender
as shown above. Screw the hydraulic cylinder into the block as far as it will go or until its front surface is flush with the swivel
block's front surface. The quick disconnect fitting on the rear of the cylinder should point down towards the ground to relieve
stress on the hose. If it does not, unscrew the cylinder out of the swivel block until it does, but no further.
If the cylinder has a stud installed into the end of its ram, it must be removed. This will expose a threaded hole in the end of
the ram. Screw the Threaded Extension Rod into the cylinder's ram until it bottoms out. Now, screw the Yoke onto the threaded
rod until it bottoms out. Rotate the swivel clockwise (to prevent it from unscrewing off the threaded rod) until it may be slid onto
the outer 3/4" drive link sleeve as shown above in figure 5. Install the Clevis Pin through the Yoke.
Hook up the pump and hose. Extend and retract the cylinder several times to purge air from the system.
Figure 5 - Bender with hydraulics installed.
10 Ton Hydraulic
Cylinder
Hydraulic Swivel Block
Clevis Pin
Yoke
Threaded Extension Rod
