If the return pressure needs adjusting, proceed as follows.
1. Turn the machine on.
2. Place a radius die and set of back shoes in position.
Tubing will not be required for this operation.
3. Advance the radius die until it just comes in contact
with the back shoes.
4. Using the manual controls, initiate the retract sequence
and read the pressure shown on the gauge located to
the front of the machine.
5. If an adjustment is required, loosen the locking nut
that secures the adjusting screw.
6. To increase the pressure, turn the adjusting screw
slightly clockwise; to decrease, counter-clockwise.
Never exceed 350 P.S.I.
SYSTEM PRESSURE
Your bender has a built in relief valve in order to control
maximum pressure output for the entire machine. As the
fluid exits the hydraulic pump, it first enters the swager
control valve that contains an adjustable “ball-check”
relief valve. (See figure 3-A)
The normal operating system pressure should be set
at 3200 P.S.l.
This pressure is read on the gauge located
near the center of the machine next to the hydraulic
pump. (See figure 3-B)
To check and adjust the system pressure, proceed as follows.
1. Turn the machine on.
2. Press the swager control valve down until the swager
cylinder is bottomed out.
3. When the cylinder bottoms out or is extended to
maximum travel the pressure will surge and the
machine will “groan” as the relief valve opens up and
fluid is redirected back to the reservoir. This is when
the reading should be taken.
4. If an adjustment is required, loosen the locking nut
that secures the adjusting screw on the relief valve.
5. To increase the pressure, turn the adjusting screw
slightly clockwise; to decrease, counter-clockwise.
Never exceed 3200 P.S.I.
ADJUSTING THE CHAINS
When the chains are properly adjusted, the threaded
chain connector will protrude from the adjusting nut
approximately one quarter of an inch. Both chains should
have equal tension. If one chain has more slack than the
other, tighten the chain connector adjusting nut using a
1-1/16” open end wrench. NEVER tighten the chain
connector so that it is bottomed out against the chain
return block. (See figure 3-C)
NOTE:
The chain return bolt has the tendency to loosen
during normal use. If it is necessary to tighten this bolt,
remove one of the chain connectors and tighten
using a 1-3/8” open end wrench.
After the bolt is secure, replace the chain
connector and adjust as described above.
Bender Operation Manual 33
CAUTION!
Never exceed 350 P.S.I. for the return pressure
unless specifically instructed to do so by the
factory for special circumstances.
CAUTION!
Never exceed 3200 P.S.I. for the system
pressure unless specifically instructed
to do so by the factory
for special circumstances.
CAUTION!
If any part of the chain or assembly bolts appear
to be damaged in any way, discontinue use
until they are replaced.
Figure 3-A
Figure 3-B
Figure 3-C
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