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Instruction Manual 

DPA-18 Air Hyd. Power Unit - V1.0 

www.durapac.com 

Page 6 of 11 

 

5.0

 

Operation 

 

IMPORTANT: 

 

 

Always monitor pressure, load or position using suitable equipment. Pressure may be 
monitored by means of an optional manifold and gauge. Load may be monitored by 
means of a load cell and digital indicator. Correct application position can only be 
determined by the operator of the equipment 

 

 

Do NOT

 operate a power unit that is disconnected from the application. If operated in 

this condition, the hose and connections will become pressurised. This increases the 
chance of a burst hazard. Damage may also occur to the power unit and its 
components 

5.1

 

Pump without an Air Regulator 

5.1.1

 

To extend the cylinder, depress the “Advance” end of the pedal until desired 
pressure, load or position is reached. 

5.1.2

 

To hold the cylinder in position, release the “Advance” end of the pedal to 
deactivate the power unit. 

5.1.3

 

To retract the cylinder, depress the “Retract” end of the pedal.  

 

Figure 3 – Operation 

5.2

 

Pump with an Air Regulator 

5.2.1

 

Open the air shut-off valve or connect the air quick coupler. 

Note

 - Under 

certain circumstances the pump may need to be primed before operation. Refer 
to 4.7 - Priming the Pump in the Installation Section. 

5.2.2

 

Slowly turn the air regulator control on the unit; 

clockwise to increase

 pressure, 

counter-clockwise to decrease

 pressure. As air enters the pump, it will begin to 

deliver fluid to the system. 

5.2.3

 

Continue to slowly turn the air regulator control clockwise until the unit gauge 
reaches the maximum hydraulic pressure rating. A maximum hydraulic pressure 
reading should be obtained if air pressure is approximately 10 bar. 

5.2.4

 

Shut off and disconnect the air supply to the pump to release all system 
pressure. Check fluid level when the hydraulic system is retracted.  

5.2.5

 

The pump is now ready for operation.  

Summary of Contents for DPA-18

Page 1: ...D 2 186 Granite Street GEEBUNG QLD 4034 Australia sales absoluteequipment com au Phone 61 7 3865 4006 Fax 61 7 3102 6288 Maximum Operating Pressure 700 bar Instruction Manual Reciprocating Air Hydraulic Power Unit Model DPA 18 ...

Page 2: ...a particular application 2 0 Receiving Instructions It is recommended prior to use that an inspection be done by qualified personnel and that any missing or damaged parts decals warning safety labels or signs are replaced with Durapac authorised replacement parts only Any power unit that appears to be damaged in any way is worn leaking or operates abnormally should be removed from service immediat...

Page 3: ...PORTANT If at any stage the safety related decals become hard to read these must be replaced Minimum age of the operator must be 18 years The operator must have read and understood all instructions safety issues cautions and warnings before starting to operate the equipment The operator is responsible for this activity towards other persons Do NOT lift hydraulic equipment by the hoses or couplers ...

Page 4: ...arp objects extreme heat or cold or heavy impact Do NOT allow the hose to 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 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 battery acid creosote impregnated ...

Page 5: ...n an unstable manner Should removal of air from power unit be required please follow the steps in 6 2 Bleeding Air from the System in the Maintenance Section 4 6 Priming the Pump Press the retract end of the pedal while holding down the air intake valve with a hexagonal wrench The air intake valve is located directly under the pedal Allow the pump to cycle approximately 15 seconds Remove the wrenc...

Page 6: ...inder in position release the Advance end of the pedal to deactivate the power unit 5 1 3 To retract the cylinder depress the Retract end of the pedal Figure 3 Operation 5 2 Pump with an Air Regulator 5 2 1 Open the air shut off valve or connect the air quick coupler Note Under certain circumstances the pump may need to be primed before operation Refer to 4 7 Priming the Pump in the Installation S...

Page 7: ...s Maintenance is required when wear or leakage is noticed Periodically inspect all components to detect any problem that may require service and maintenance 6 1 Adding Hydraulic Fluid WARNING Always add oil with pump fully retracted or the system will contain more oil than the reservoir can hold 6 1 1 Depressurise and disconnect hydraulic hose from application cylinder 6 1 2 With the power unit in...

Page 8: ...ended that an inline oiler and air dryer is installed and SAE grade oil 5W to 30W is used Set the unit to feed approximately one drop of oil per minute into the system 6 5 Storage 6 5 1 When not in use depressurise and disconnect the hydraulic power unit from the application 6 5 2 Wipe clean thoroughly and store in a clean dry environment Avoid temperature extremes 6 5 3 For transportation or long...

Page 9: ...Repair or replace as necessary Leaking application connection Replace application connection Application responds slower than normal Loose connection or coupler Tighten connection or coupler Restricted hydraulic line or fitting Clean and replace if damaged Leaking application connection Replace application connection Inadequate air supply Ensure air source can dedicate 7 8 cfm 4 12 bar 60 175 psi ...

Page 10: ...Instruction Manual DPA 18 Air Hyd Power Unit V1 0 www durapac com Page 10 of 11 8 0 Parts Breakdown ...

Page 11: ...2 39 Outlet bush ZAM2371 1 11 Silencer ZAM2348 1 40 Steel ball ZAM1273 1 12 Bolt ZAM2117 2 41 Spring ZAM2372 1 13 Switch gear ZAM2349 1 42 O ring ZAM2373 2 14 Spacer ZAM2350 2 43 Back up ring ZAM1834 2 15 Spacer ZAM2351 2 44 Outlet shaft ZAM2374 1 16 Base plate ZAM2352 1 45 Fixing plug ZAM2375 1 17 Cylinder ZAM2353 1 46 Spring ZAM2376 1 18 O ring ZAM2354 2 47 Pressure relief ZAM2377 1 19 Motor cov...

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