Enerpac EFBE5017, Instruction Sheet

19

Figure 11, Piston Manual Retract Procedure

2

1

3

Position 2

Position 1

Piston Release Lever

4. Using a rigid piece of steel bar, manually push the 

piston inside the cutter until it is returned to the home 

position. See Figure 11, item 3. This should dislodge 

any dirt or other material that had prevented the 

piston from returning during normal operation.

5. Move the piston release lever fully clockwise to 

position 1. See Figure 11.

6. Connect cutter to AC power supply. Quickly depress 

and release the trigger repeatedly until the piston is 

advanced about 3/4 inch [19 mm].

7. Disconnect cutter from AC power supply to prevent 

accidental motor startup during cleaning procedures 

in the following step.

8. Clean the exposed portion of the piston. Remove any 

debris, chips or dirt from this area. See Figure 11,  

item 1.

9. Connect cutter to AC power supply and test cutter 

for proper operation. Verify that piston automatically 

returns to the “home” position after it is fully advanced 

and the trigger is releas

ed.

NOTICE

If the piston still does not fully retract after 

performing the previously described cleaning procedure, 

the cutter should be inspected and serviced by an 

Enerpac authorized service center.

11.0  CLEANING THE PISTON AREA

NOTICE:

  WARNING

Always disconnect cutter from AC 

power supply before cleaning the piston head area 

or before manually retracting the piston. Failure to 

observe this precaution could result in accidental 

startup during cleaning procedures. Serious 

personal injury could result.
11.1  Cleaning and Inspection

•  Keep the piston area clean to ensure that the piston 

fully returns after it advances to maximum stroke.

•  Remove any built-up dirt or debris from the cutting 

head, the piston and moving blade.

11.2  Manually Retracting the Piston

The piston may fail to fully retract if debris is wedged 

under or beside the piston and moving blade.
If this condition occurs, it may be necessary to manually 

retract the piston into the cylinder to fully return the 

piston to the “home” position.
Refer to the following steps. See Figure 11:
1. Disconnect cutter from AC power supply to prevent 

accidental motor startup during the following steps.

2. Place the cutter horizontally on a stable work surface.
3. Move the piston release lever counterclockwise to 

position 2. See Figure 11.

Position 1  

(normal operation)

Position 2  

(piston release)

Key: 

1. Cutting Head 

2. Piston

3. Bar (user-supplied)