(636) 745-7757
Shoulde
t
Fax: (636) 745-2874
Division of Mittler Corp.
P.O. Box 110 Foristell, Missouri 63348
10 Cooperative Way Wright City, MO 63390
2500-400 Bend Stop
For 2500 180° Hydraulic Bender
1. Check to see if your bender has the old style (simple angle iron) or new style mount as shown
below. If you have the old style bracket go to step #2. If you have the new style bracket go to step
# 3.
2. If you have the old style mount, remove the return spring carefully and then unbolt the bracket
from the rack.
3. Mount the new style bracket to the rack being sure to use the 1-1/4” long allen bolt, flat washer &
lock washer in the hole closest to the cylinder. This is critical so the rack does not bind on the
cylinder.
4. Bolt the STOP WHEEL assembly to the new style bracket. Use the supplied shoulder bolt, spring
washer and Nylock nut installed as shown below. Install the DETENT BUTTON as shown, set the
tension and then jam the nut.
5. Bolt the Air Switch bracket to the bearing mounting block. Remove the installed bolts and use the
supplied 1-1/2” allen bolts to attach the bracket. Be sure the bolts are TIGHT.
\\Mbserver01\Engineering\Product\Product Documentation\2500 180 HYD Bender\Bend Stop Instructions\Bend Stop Hook Up Instructionsl VER2.doc Rev2 12-14-2006
New Style Bracket
Stop Wheel
Assembly
r Bol
Air Switch
Bracket
3/8” x 1-1/2” Long
Supplied Bolts
Cylinder
1-1/4” Bolt with
washer & lock
washer installed.
Detent Plunger
Spring Washer
Nylok Nut
(
)
A
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6. Bolt the AIR SWITCH to the mounting block using the ¼” x 1” allen bolts as shown below. Be
sure the button end is pointed toward the cylinder end of the bender and that the elbow fitting
without anything screwed into it is pointed to the bearing.
Button end
Shop Air In
Air Switch
To Hydraulic
Pump Air Inlet
air out
7. Hook your shop air supply to the Elbow Fitting as shown above.
8. Hook one end end of the Supplied Hose to the Air Out Elbow and then to the air inlet of your
air-hydraulic pump.
9. Be sure the STOP WHEEL is rotated so no rods will contact the AIR SWITCH BUTTON when the
bender is actuated.
10. Reattach the return spring to the bracket as shown below in step #12.
11. Bend a sample piece of tubing to the desired degree using the Digital readout set MM. Stop the
bender but do not release the pedal.
12. Rotate the STOP WHEEL to a position that will allow one of the STOP RODS to be adjusted to
just touch the AIR SWITCH Button as shown in the example below. Once the length is set be
sure the STOP WHEEL is in a detent.
djust this rod.
Spring Mount
Hole.
To line up with
the AIR SWITCH
BUTTON
13. Rotate the STOP WHEEL until the Adjuster Bolt just touches the Air Switch Button, and then
adjust the rod into the button until you hear the air flow to the pump quit. Tighten the jam nut on
the STOP ROD.
14. Make one more test bend using this setting. Fine tune this adjustment as needed by following
repeating steps #11 & #12 above.
15. This stop is now set to your desired degree of bend for this tube size and shoe radius. This may
have to be readjusted for time to time because of variances in tubing wall thickness and material
quality.
16. The other two stops can be set in the same way for other degrees or tubing sizes. A “cheat” sheet
with STOP ROD lengths for different sizes will help you get a quick adjustment before fine tuning.
KIT CONTENTS:
1ea. Air Switch Mounting Bracket
1ea. Air Switch (w/ two elbows & one air fitting)
1ea. Air Hose
1ea. Stop Wheel Assembly (knurled knob w/ threaded rods installed)
1ea. Stop Wheel / Spring Return Bracket
2ea. ¼-20 x 1” SHCS for mounting air switch
2ea. 3/8-16 x 1-1/2” SHCS for mounting air switch bracket
1ea. Shoulder bolt for mounting stop wheel assembly
1ea. Spring washer for mounting stop wheel assembly
1ea. Detent ball assembly for stop wheel
1ea. 3/8 Nylok Nut foe shoulder bolt on stop wheel
1ea. ¼-20 x 1-1/4” SHCS for bracket to rack mount at cylinder end
1ea. ¼” Lock washer
1ea. Air Flat washer
1ea. Instruction sheet
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We appreciate your business and hope that you enjoy your new Mittler Bros. Product. If you have any
questions or concerns please feel free to call us at 1-800-467-2464 for help.
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