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4.3  Pump Position

The pump may be operated in either the horizontal or 
vertical position. See Figure 7.

When  operated  in  the  vertical  position,  hose  end  of 
pump  must  be  pointed  down,  or  the  pump  will  pick 
up air and will not properly build pressure.

Note: 

The  pump  is  not  designed  for  use  in  the 

inverted (upside-down) position.

OK

OK

Figure 7, Pump Orientation

5.0  OPERATION

5.1  Before Using the Pump

1.  Check  all  system  fittings  and  connections  to  be 

sure they are tight and leak free.

2.  Check oil level in reservoir and add oil if required. 

Refer to instructions in Section 9.1.

3.  Read  and  understand  the  following  precautions 

before operating pump:

WARNING: 

In certain situations the pump 

handle can “kick back”. Always keep your 
body to the side of the pump, away from 

the line of force of the handle.

WARNING: 

When  operating  the  pump 

handle, keep hands and fingers away from 
pinch  point  area  between  pump  handle 

and lifting/transport handle.

CAUTION: 

Always  remove  shipping 

plug(s)  from  pump  outlet  port(s)  and 
replace  with  proper  hydraulic  fitting(s) 

before  operating  pump  handle.  If  pump  handle  is 
operated with shipping plug(s) installed, plug(s) could 
eject  from  port(s)  with  great  force,  resulting  in 
possible personal injury.

CAUTION: 

Never add extensions to pump 

handle.  Extensions  cause  unstable  pump 
operation.

CAUTION: 

To 

prevent 

mechanical 

damage, do not pull on pump handle after 
it has reached the end of its travel. Do not 

apply side force to pump handle.

IMPORTANT: 

To  reduce  handle  effort  at  high 

pressure,  take  short  strokes.  Maximum  leverage  is 
obtained in the last 5 degrees of stroke.

5.2  Two Stage Flow
Models P-77, P-80, P-801 and P-84

Two-speed  pumps  provide  two  stage  flow.  Under 
no-load,  the  pump  operates  in  the  high  flow  first 
stage for rapid advance. When the load is contacted, 
the  pump  automatically  shifts  to  the  second  stage 
for building pressure. After the pump shifts, pumping 
takes less effort.

Note:

 

For  best  performance,  operate  pump  handle 

at  moderate  speed  during  the  high  flow  first  stage. 
Rapid handle speed in the first stage will prevent the 
pump from delivering full volume of oil.

5.3  Pump Operation
Models P-18, P-39, P-77, P-80 and P-801

All  pump  models  except  the  P-84  are  designed  for 
use  with  single-acting  cylinders  and  are  equipped 
with an integral release valve.

1.  Close the release valve by turning knob clockwise 

until it stops. See Figure 8.

CAUTION:

 Close release valve finger tight 

ONLY.  Using  tools  on  release  valve  can 
damage  it  and  cause  the  pump  to 

malfunction.

2.  Operate  pump  handle  to  deliver  hydraulic  power 

to  system.  Pressure  will  be  maintained  until 
release valve is opened.

3.  Open the release valve by turning knob counter-

clockwise. Pressure will be released, allowing oil 
to flow back to the reservoir.

CLOSE

OPEN

Figure 8, Release Valve (all except P-84)

CAUTION: 

If release valve knob is difficult 

to  turn  or  becomes  stuck,  immediately 
discontinue  using  pump.  Have  pump 

inspected  and  repaired  by  an  Enerpac  Authorized 
Service Center.

Summary of Contents for Ultima P-18

Page 1: ...ces to avoid personal injury A DANGER is only used when your action or lack of action may cause serious injury or even death WARNING Wear proper personal protective gear when operating hydraulic equipment WARNING Stay clear of loads supported by hydraulics A cylinder when used as a load lifting device should never be used as a load holding device After the load has been raised or lowered it must a...

Page 2: ...nt must only be serviced by a qualified hydraulic technician For repair service contact the Authorized ENERPAC Service Center in your area To protect your warranty use only ENERPAC oil WARNING Immediately replace worn or damaged parts with genuine ENERPAC parts Standard grade parts will break causing personal injury and property damage ENERPAC parts are designed to fit properly and withstand high ...

Page 3: ...for the locations of pump features and major components Refer to Table 2 for descriptions of items A through G A B C D D E Figure 1 Models P 18 and P 39 A B C D D E G Figure 2 Model P 77 A B C D D E F G Figure 3 Models P 80 and P 801 B C D D E A G Figure 4 Model P 84 ...

Page 4: ...n external pressure reducing valve is being used in the circuit connect the tank port of the valve to the return to tank port on the pump Note Cylinders hoses and accessories shown in Figure 5 are sold separately and not included with pump Refer to the Enerpac catalog for a complete description of available components and accessories The exact components required for your system will vary dependin...

Page 5: ... reached the end of its travel Do not apply side force to pump handle IMPORTANT To reduce handle effort at high pressure take short strokes Maximum leverage is obtained in the last 5 degrees of stroke 5 2 Two Stage Flow Models P 77 P 80 P 801 and P 84 Two speed pumps provide two stage flow Under no load the pump operates in the high flow first stage for rapid advance When the load is contacted the...

Page 6: ... 1 Loosen and remove oil fill plug to provide reservoir venting during the following steps 2 Fully close release valve 3 Position pump in the horizontal position at higher elevation than cylinder See Figure 11 4 Position cylinder with the plunger end down up if using pull cylinder 5 Operate pump to fully extend the cylinder retract if using pull cylinder 6 Open release valve to retract cylinder ex...

Page 7: ... result if this maximum limit is exceeded Damage to pump and components may also occur 6 All models except P 84 After the desired setting is obtained turn the release valve counter clockwise to relieve system pressure Check that pressure gauge indicates zero 0 psi bar 7 Model P 84 only After the desired setting is obtained move the valve handle to the N neutral position to relieve system pressure ...

Page 8: ... only the oil fill plug supplied with the pump or a genuine Enerpac replacement plug of identical specifications CAUTION Never attempt to return more oil to the reservoir than it is capable of holding 9 2 Changing the Oil Drain all oil from reservoir and refill with clean Enerpac oil every 12 months If pump is used in dirty environments change the oil more frequently 1 Remove oil fill plug from re...

Page 9: ... to lift more than rated tonnage 6 Remove air according to the instructions in Section 6 0 7 Remove excess oil from reservoir Note If cylinder operates normally when pump oil fill plug is loosened reservoir may be overfilled with oil 8 Check for damage to cylinder Have cylinder serviced by an Enerpac Authorized Service Center 1 Check that all connections are tight and leak free 2 Locate leak s and...

Page 10: ... 7 495 98090 92 sales ru enerpac com Singapore Actuant Asia Pte Ltd 83 Joo Koon Circle Singapore 629109 T 65 68 63 0611 F 65 64 84 5669 Toll Free 1800 363 7722 sales sg enerpac com South Korea Actuant Korea Ltd 3Ba 717 Shihwa Industrial Complex Jungwang Dong Shihung Shi Kyunggi Do Republic of Korea 429 450 T 82 31 434 4506 F 82 31 434 4507 sales kr enerpac com Spain and Portugal ENERPAC SPAIN S L ...

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