MB 900 Operating And Servicing Manual

Operating, Servicing, and Safety

Manual

Model # 900

90° Hydraulic Bender

CAUTION: Read and Understand

These Operating, Servicing, and

Safety Instructions, Before Using

This Machine.

1-800-467-2464

10 Cooperative Way Wright City, MO 63390

P.O. Box 110 Foristell, MO 63348

1-636-745-7757 Fax [phone]

www.mittlerbros.com

REV 1 March 10 2011

• Safety Pg.3

• Hydraulic Safety Pre cautions Pg.4

• Hydraulic System Oper ation Pg.5

• Machine Set up Pg.6

- 2 -

Table of Contents

• Operation Pg.7

• Math Formulas Pg.8-11

• Technical D iagram Pg.12

• Optional Equipment Pg.13-15

• Maintenance Pg.16

- 3 -

SAFETY

The purpose of the safety section of this manual is to inform operators and

maintenance personnel of the precautions to be taken while operating or servicing the

machine. The following are a few basic guidelines to follow, but as with any type of

machinery good judgment and a safe attitude should be applied at all times.

1. Always disconnect power, lock-out and tag-out machine per OSHA regulations before

attempting to service this machine.

2. Always wear safety glasses or other approved eye protection while operating or
servicing the machine.

3. Keep all body parts and any foreign objects away from moving parts. Do not reach
into the machine without first disconnecting all power sources.

4. Do not attempt to override any safety device on the machine.

5. Do not operate the machine if it has been damaged or is not operating properly.

6. Do not wear jewelry (watches, rings, necklaces, etc.), or loose fitting clothing while
operating or servicing the machine.

7. The machine should only be operated or serviced by properly trained, authorized
personnel.

8. Replacement parts should have the same specification and operation as the original
parts on the machine.

9. Before starting the machine be sure it is set up properly.

10. The machine and work area should be kept neat and clean.

11. Do not operate or service any machine while under the influence of drugs or alcohol.

NOTE: THESE SAFETY RULES ARE FOR YOUR BENEFIT TO HELP PREVENT INJURY TO

YOURSELF AND/OR YOUR CO-WORKERS. REVIEW ALL SETUP AND OPERATING

PROCEDURES, WHETHER COVERED OR NOT, IN THIS MANUAL TO HELP INSURE SAFE

OPERATION OF THE MACHINE.

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HYDRAULIC SAFETY PRECAUTIO NS

WARNING

General Operation

• All WARNING statements must be carefully observed to help prevent personal injury.

• Before operating the pump, all hose connections must be tig ht en ed with the proper tools. Do not over

tighten. Connections should only be tightened securely and leak-free. Over tightening can cause
premature thread failure or high pressure fittings to split at pressures lower than their rated capacities.

• Should a hydraulic hose ever rupture, burst, or need to be disconnected, immediately shut off the
pump and release all pressure. Never attempt to grasp a leaking pressurized hose with your hands.
The force of escaping hydraulic fluid could cause serious injury.

• Do not subject the hose to potential hazard such as fire, sharp surfaces, extreme heat or cold or
heavy impact. Do not allow the hose to be altered or kink, twist, curl, crush, cut, or bend so tightly that
the fluid flow within the hose is blocked or reduced. Periodically inspect the hose for wear, because
any of these condition’s can damage the hose and possibly result in personal injury.

• Do not use the hose to move attached equipment. Stress can damage hose and possibly cause
personal injury.

• Hose material and coupler seals must be compatible with the hydraulic fluid used. Hoses also must
not come in contact with corrosive materials such as creosote-impregnated objects and some paints.
Consult the manufacturer before painting a hose. Hose deterioration due to corrosive materials can
result in personal injury. Never paint the couplers.

• Inspect machine for wear, damage, and correct function before each use. Do not use machinery that
is not in proper working order, but repair or replace it as necessary.

• Replace worn or damaged safety decals.

• Modification of a product requires written Power Team authorization.

• Use only components with the same pressure rating when assembling a system or machine.

Pump

• Do not exceed the hydraulic pressure rating noted on the pump data plate or tamper with the internal
high pressure relief valve. Creating pressure beyond the rated pressure can result in personal injury.

• Before replenishing the fluid level, retract the system to prevent overfilling the pump reservoir. An
overfill can cause personal injury due to excess reservoir pressure create when cylinders are
retracted.

Air Supply

• Shut off and disconnect the air supply when the pump is not in use or before breaking any

connections in the system.

PREPARATION & SET-UP

Air Supply Hook-Up

Remove the thread protector from the air inlet of the pump. Select and install the threaded fittings
which are compatible with your air supply fittings. The air supply should be 20 CFM (.57 M3/min.) and
100 PSI (7 BAR) at the pump to obtain the rated hydraulic pressure. Air pressure should be regulated
to a maximum of 140 PSI (9 BAR). Secure your pump fitting to the air supply.

WARNING: If improperly used, pressurized equipment can be potentially hazardous. Therefore:

• Hydraulic connections must be securely fastened before building pressure in the system.

• Release all system pressure before loosening any hydraulic connection in the system.

Venting the Reservoir

To improve hydraulic fluid delivery and increase useable hydraulic fluid capacity, remove shipping
plug and install filler/vent cap before using the pump.

- 5 -

RED Plug should

Pump Assembly

Air

TOE END

HEEL END

Push Down to

Female End

Male End

Retainer Collar

HYDRAULIC SYSTEM

1. Remove the RED Plug in the pump assembly and replace with the

supplied BLACK plug. This is the reservoir venting system
and damage or inoperabilit y may result if not chang ed out.

2. Attach the hydraulic hose to the pump. Be sure to use a
quality thread sealer on both connections

3. Attach an air line fitting for your shop air to other end of the
pump.

be changed to
BLACK Plug

Hydraulic Hose

Connector

Release Pressure

4. Push the pump foot pedal to the release position (TOE END) to
relieve all internal pressure.

5. Push the MALE hose end, from the pump, into the FEMALE
Cylinder fitting.

6. Thread the retainer collar hand tight. NOTE: This procedure will insure that the male & female fittings
positively seat against each other, eliminating any possibility of air locking. CAUTION Failing to follow
this procedure may cause the cylinder to not retract and / or leak.

BLEED THE CYLINDER

7. Connect a compressed air supply (90PSI) to the pump.

8. Elevate the pump and hose above the cylinder.

9. Push the hydraulic pump pedal HEEL END to actuate the

cylinder. Run the cylinder out about half way. Release the pump
by pressing on the TOE END of the pedal. Repeat this process
three or four times or until the ram cylinder movement is smooth.

Retract

Pump