Enerpac EBC20B, Instruction Sheet

22

Figure 17, Piston Manual Retract Procedure

2

1

3

Tighten

Loosen

Key:

1. Cutting Head 

2. Piston

3. Bar (user-supplied)

Piston Release 

Screw

11.0  CLEANING THE PISTON AREA

NOTICE:

  WARNING

Always remove battery from cutter 

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 17:
1. Remove battery from cutter to prevent accidental 

motor startup during the following steps.

2. Place the cutter horizontally on a stable work surface.
3. Loosen the piston release screw one full turn 

counterclockwise to manually release the piston. 

Refer to Section 8.3 for additional information.

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 17, item 3. This should dislodge 

any dirt or other material that had prevented the 

piston from returning during normal operation.

5. Tighten the piston release screw to enable the 

automatic retract function (normal operation). Refer to  

Section 8.3 for additional information.

6. Reinstall battery on cutter. Quickly depress and 

release the on-off trigger repeatedly until the piston is 

advanced about 3/4 inch [19 mm].

7. Remove battery from cutter 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 17,  

item 2.

9. Reinstall battery on cutter and test cutter for proper 

operation. Verify that piston automatically returns to 

the “home” position after it is fully advanced and the 

on-off trigger is released.

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.

Tighten

Loosen