Enerpac EBC20B, Instruction Sheet

17

10.5.1  Hydraulic System Maintenance Precautions

NOTICE:

  WARNING

Always remove battery from cutter before performing 

hydraulic system maintenance. Failure to observe 

this precaution could result in accidental startup 

while maintenance procedures are being performed. 

Serious personal injury and damage to cutter may 

result.
Wait for cutter to cool before performing hydraulic 

system maintenance. Hot oil can cause burns.
Be sure that oil reservoir cap is securely tightened 

after checking oil level or changing the oil. Leaking 

oil can cause short circuits, fire and explosions.

Additional Precautions:

•  Do not check oil level or change the oil in dusty areas.
•  Be sure that all tools (wrench, screwdriver, etc.) used 

to perform maintenance procedures are clean.

•  When adding oil and performing oil changes, take every 

precaution to prevent impurities from contaminating 

the oil or entering the cutter. Impurities can cause 

permanent damage to the hydraulic components.

•  The hydraulic reservoir contains a diaphragm that 

slightly pressurizes the oil. Some oil spillage may occur 

when checking the oil level or when changing the oil. 

Wear and/or use appropriate personal protective 

equipment (PPE) to prevent exposure to hydraulic oil.

•  Use only new Enerpac HF hydraulic oil poured from a 

clean container. Use of other oil brands and/or used 

oil may damage the cutter and may void the Enerpac 

product warranty.

10.5.2  Checking Oil Level and Adding Oil 

NOTICE

The reservoir contains a flexible rubber 

diaphragm that slightly pressurizes the oil. To help 

prevent excessive oil leakage when the reservoir cap is 

removed, be certain that the piston is advanced until 

there is a gap of about 1/8 inch [3-4 mm] between the 

fixed and moving blades (as described in step 1) before 

loosening the cap.
The gap between the blades should not be less than  

1/8 inch [3-4 mm]. A smaller gap may result in the piston 

retracting unexpectedly while the oil level is being 

checked.

Refer to Figure 14 and Figures 15A through 15C during 

the following steps:
1. Operate the cutter and advance the piston until 

there is a 1/8-inch [3-4 mm] gap between the fixed 

and moving blades (until just before the piston 

automatically returns).

2. Remove the battery to prevent accidental motor 

startup during the following steps.

3. Place the cutter on a stable and level work surface, 

with the oil reservoir cap facing straight up. Note that 

the cap does not face straight up when the tool is 

laid on a flat surface, so positioning aids are required. 

Place a pan or suitable container under the cutter to 

catch any spilled oil.

NOTICE

The oil reservoir cap is located just below the 

on-off trigger when the cutter is positioned in the 

inverted (upside-down) position. Be certain to remove 

only this cap in the next step. DO NOT remove the relief 

valve by mistake. See Figure 14.

Figure 14, Oil Drain/Fill Cap 

(cutter shown in inverted position)

1

2

Key:

1.  Oil Reservoir Cap
2.  Relief Valve  

(DO NOT remove)

4. To prevent contamination, remove any built-up dust 

and dirt from the oil reservoir cap and surrounding 

area.

NOTICE

A small amount of hydraulic oil may leak from 

the drain/fill hole when cap is loosened in the next step. 

Be prepared to catch this oil in a pan or with a clean rag. 

Dispose of spilled oil in accordance with all applicable 

laws and regulations.

5. Slowly loosen the oil reservoir cap while watching for 

oil flow:

  • If oil starts flowing from the oil drain/fill hole as the 

cap is loosened, the reservoir is full. Tighten the cap 

immediately. To avoid excessive oil spillage, do not 

continue loosening the cap if oil flow occurs. Skip 

steps 6 through 8 and go on to step 9.

  • If no oil flow occurs when the cap is loosened, fully 

loosen and remove the cap. Then, check oil level and 

add oil (if needed) as described in steps 6 through 8.

6. Check the oil level in the drain/fill hole. Oil level will be 

up to the top of the hole when reservoir is full.

7. If oil level is low, slowly add new Enerpac HF oil 

through the oil drain/fill hole, until the oil level is up to 

the top of the hole.

8. Remove any residue or metal particles from the oil 

reservoir cap (it is magnetic).