Enerpac ECSE300, Instruction Sheet

14

10.5.3  Changing the Oil

NOTICE

The oil change procedure will replace most, 

but not all, of the oil. It is to be performed for maintenance 

purposes. If the oil is contaminated, or if for any other 

reason a full oil evacuation is necessary, cylinder 

disassembly by an Enerpac authorized service center is 

required in addition to the standard oil change 

procedure.

NOTICE

The oil change procedure is very detailed and 

will take a considerable amount of time. It should only 

be performed by a trained technician at an Enerpac 

authorized service center. Failure to properly perform 

the procedure may result in incomplete filling of the 

cutter oil reservoir, which could lead to cavitation, air 

entrainment, reduced performance and pump damage.
Change the oil in the cutter hydraulic reservoir as 

described in the following steps. Refer to Figures 9A 

through 9E:
1. Fill a clean oil dispenser with new Enerpac HF oil. Put 

the dispenser aside for later use.

2. Fully close the jaws.
3. Disconnect the cutter from the AC power supply to 

prevent accidental motor start-up during the following 

steps.

4. Place the cutter in the horizontal position, on a 

stable and level work surface, upside down with 

the diaphragm cover facing upwards. Place a pan 

or suitable container under the cutter to catch any 

spilled oil.

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

and dirt from the oil reservoir cap, diaphragm cover 

and surrounding area.

NOTICE

A small amount of hydraulic oil leakage may 

occur when the diaphragm cover is removed 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.
6. Remove the rubber support from the diaphragm 

cover.

7. Using an adjustable face spanner wrench, loosen and 

remove the diaphragm cover.

8. Remove the diaphragm from the diaphragm opening. 

NOTICE

It is not necessary to remove the oil reservoir 

cap, as the oil will be drained and filled through the 

diaphragm opening.
9. Completely drain all old oil from the cutter through the 

diaphragm opening, turning it right-side up and using 

a suitable oil extraction system (used oil extraction 

pump) if necessary, so that no oil remains in the 

cutter reservoir. 

NOTICE

Dispose of all used oil in accordance with all 

applicable regulations and laws.

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 as far as 

possible and that the jaws are fully closed before 

loosening the cap.
Refer to Figures 9A through 9C during the following steps:
1. Operate the cutter and fully close the jaws.
2. Disconnect the cutter from the AC power supply to 

prevent accidental motor start-up during the following 

steps.

3. Place the cutter in the horizontal position, on a stable 

and level work surface, with the oil reservoir cap 

facing upwards. Place a pan or suitable container 

under the cutter to catch any spilled oil.

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).

9. Install and securely tighten the oil reservoir cap.
10.  Using a clean rag, wipe the cutter housing, grip and 

motor so that these surfaces are free of oil residue.

11. Connect cutter to AC power supply. Cycle the 

piston several times to test for proper operation 

before placing the cutter back into service.