RIDGID 3801 Gebrauchsanleitung Seite 2

OPERATING INSTRUCTIONS
For your own safety, before assembling
and operating this unit, read this
Operator's Manual carefully and completely.
Learn the operation, applications and
potential hazards peculiar to this unit.
Assembling
1. a. 1 1/4", 2" and 3" machines.
Place the bending frame with its supports on the floor and slip the ring over
the front of the pump cylinder.
Place the U-bracket through the holes in the ring block of the bending
frame. The pump cylinder and pipe bending frame are now fixed in the correct
position.
1. b. 4" machine.
- Place the base beam on the floor.
- Place the lower wing on the base beam.
- Place the bending-pump on the base beam, hook the lower wing into the
pump and secure the pump at the rear with two M10 bolts.
- Place the corner-supports and where applicable the bending-former that
you will be using, on the lower wing.
- Place the upper wing on the corner-supports and hook it into the pump.
- Insert the fixing-pins through the wings and the corner-supports.
2. Mount a bending former according to the diameter of the pipe to be bent,
on the ram top. The corner supports must be placed between, or on the
bending frame. They are fastened by means of the fixing-pins. The holes in
the frame allow the corner supports to be adjusted to the desired outside
diameters. The holes are marked accordingly. Ensure that the fixing pins for
corner supports are properly fitted through both wings or through the
bending frame to prevent damage.
Bending
1. The filling cap is pierced for air release. Whenever the bending machine is
transported this filling cap must be tightly closed, but released a little
when in use.
2. Before bending, the pipe should be slightly greased. The pipe is then slipped
between the corner supports and bending former. The relief spindle must
be locked tightly. By moving the handle up and down the pump is put into
operation. The ram moves out and the pipe is bent. The bending operation
should be continued until the desired curve is reached but not further than
the bending former curve. It should be remembered that the pipe will spring
back a little according to the quality of the pipe. This must be established
by experience.
3. As soon as the pipe reaches its required shape, loosen the relief spindle and
the ram withdraws automatically. Disconnect one of the corner supports
and the pipe can be removed. The models equipped with an open frame
have the advantage that the bent tube can removed easier, especially long
pieces of tubes with several bends, thus saving a lot of time.
4. If a bend has been bent too far this can be corrected by means of the
straightener. The ram must be reversed and the tube turned over against the
corner supports. The straightener is placed on the ram top and the bend can
now be pushed back to its desired shape. On the 1 1/4" bending machine
a bend of 90° cannot normally be corrected. This also applies to the 3"
machine for 2 1/2" and 3", for the 4" machine for 3" and 4" pipes.
5. For 3" and 4" model only.
When bending 2 1/2", 3" and 4" pipes an extension piston should be applied
to the ram when the tube has been bent past 75°. The stroke of the ram is
not enough to bend a 90° bend in one operation.
Numbers in brackets refer to electric machines.
FAULT
1. The ram (33) will not move out far enough.
IMPORTANT
Faults which may occur and how they can be corrected
a. The fiiling cap (37) is not loosened sufficiently.
b. The oil container is not filled sufficiently.
c. Air vent in filling cap (37) is blocked.
6. 1 1/4", 2", 3", 4" electro-hydraulic pipe bending machines.
The electro-hydraulic pipe bending machines are equipped with a single
phase 115 V, 220 V, AC or 380 V 3 phase motor. The motor has a special
safety switch. Once the motor is running the movement of the ram is
controlled by means of a relief spindle which can be either opened or
closed. The motor does not have to be switched off. The machine also
features a pressure safety valve. This is factory set so that heavy wall pipe
(steam pipe) can be bent without any problem. The pressure safety valve
is situated in the pump housing and can only be set by means of a
manometer.
Bending of Hairpin Shapes of 180
For this, additional accessories are required which can be delivered on request.
Assembling
1. See under assembling bending machine.
2. The bending former (180°) according to the size of the pipe to be bent, is
placed on the ram. Next, the plates (spare frames) with 3 rolls (diabolos)
are adjusted between or in the frame. The fixing-pins for corner supports
must be put in the holes 1 1/4" through the center lock; the removable diabolo
must be removed and the pipe to be bent run through. The pipe must now
touch the center diabolo with one side and the 180° bending form with the other
side. Bending can now be started.
Bending
1. See under bending.
2. If the bending is more than 90°, the ram must be reversed, by releasing the relief
spindle. Adjust the removable diabolos and bend up to 180°. To remove the bent
pipe, see Bending.
ASSEMBLING OF THE 4" MACHINE
Upper wing
Corner support
with fixing pins
Lower wing
Maintenance
The bender is delivered with a filled oil container. However, the oil level must be checked
regularly as otherwise the stroke of the ram will become too short. Oil must always be
level with the bottom of the filling cap. If oil needs to be added, use only hydraulic oil.
Caution
1. Ensure that corner supports are always adjusted symmetrically in the
holes, according to the size of the pipe to be bent. If not placed properly,
the ram instead of the pipe may be bent and the machine badly damaged.
2. Also take care that fixing-pins for corner supports are properly fitted through
the holes in the upper and under wing of the bending frame, and all the way
through on the open bending frame.
3. The ram must be moved out beyond the groove mark.
POSSIBLE CAUSE
O
HOW TO CORRECT
a. Release filling cap (37) about 1 or 1 1/2 turns.
When removing the machine take care that filling
cap is closed tightly.
b. Refill oil container until oil is level with bottom of
filling cap. The ram should not be pumped out
beyond the groove mark on the ram.
c. Clean air vent hole.
4" pump
Base beam