Enerpac PL200-Series - Manual (Page 11)

11
NOTICE To prevent hydraulic pressure from re-building in the
system, do not depress the pendant DOWN button at any time
during the following steps.
2. Depressurize the jack pneumatic system, as described in
steps 2a through 2f:
a. Move the jack air-shutoff valve to the CLOSED position.
b. Disconnect air supply hose at jack air-shutoff valve.
NOTICE Jack may start and run briefl y in the following step, as
trapped air is expelled from the jack pneumatic system.
c. Depress and hold the pendant UP button. Continue
holding button until jack air motor stops running. Motor will
usually stop after about 2 to 6 seconds, depending on length
of air supply hose.
d. Verify that there is no audible “air hiss” sound coming
from the jack.
e. Remove the jack rear access cover (if not already
removed). Refer to Section 7.1.
f. Check the air pressure gauge on the jack fi lter/lubricator.
Verify that it indicates zero (0) psi/bar.
NOTICE If any pressure is indicated on gauge, be certain that
air-shutoff valve is in the CLOSED position and that air hose is
disconnected from air shut-off valve. Then, repeat steps 2c
through 2f.
3. Proceed with desired maintenance or repair procedure.
7.3 Checking Oil Level
Check the hydraulic oil level every 90 days.
1. Be sure that cylinder is fully retracted and that the jack is
positioned on a fi rm and level surface.
2. Remove the jack rear access cover. Refer to Section 7.1.
3. Be sure the air shut-off valve is in the CLOSED position.
4. Unscrew and remove the oil fi ll plug. See Figure 11.
5. Check the oil level in the reservoir. Oil level should be
approximately 1 inch [25 mm] below top of reservoir, with
cylinder fully retracted and air motor turned off . See Figure 11.
6. If oil level is low, add Enerpac HF hydraulic oil as required.
Use a funnel to avoid spillage.
NOTICE
• Reservoir is vented. To prevent oil leakage through the air
breather, do not fi ll reservoir completely to the top.
• To help avoid accidental overfi lling of reservoir, always make
sure that cylinder is fully retracted before checking oil level or
adding additional oil.
• If Enerpac HF is not available at the worksite, use an equivalent
hydraulic oil that meets the specifi cations shown in Table 8.
7. Reinstall oil fi ll plug.
8. Reinstall the jack rear access cover. Refer to Section 7.1.
Table 8 - Hydraulic Oil Specifi cations - ISO 32
ISO Grade 32
Viscosity Index 100 min
Viscosity at 210 ° F 42-45 S.U.S.
Viscosity at 100 ° F 150-165 S.U.S.
Viscosity at 0 ° F <12000 S.U.S.
API Gravity 31.0-33.0
Flash, C.O.C. ° F 400
Pour Point, ° F -35
Figure 11, Oil Level - Hydraulic Reservoir
(handle assembly removed to show detail)
FULL = 1 inch [25 mm]
below top of reservoir
Oil Fill Plug
Oil Level
(FULL)
NOTICE
• Failure to use the proper oil may result in damage to jack
hydraulic components and will void the product warranty. Use
of Enerpac HF oil is strongly recommended.
• Be sure that the oil is clean. The oil cleanliness should be
maintained to a maximum level of 18/16/13 per the ISO4406
standard. If the oil has a milky, cloudy or dark appearance, it
should be changed immediately as described in Section 7.4.
7.4 Changing the Oil
Change the oil in the hydraulic reservoir every 12 months or 500
hours of use. See Figure 12.
The following conditions will require more frequent oil changes:
• Rigorous duty, where oil temperature may reach 150 °F
[60 °C].
• A high humidity environment and/or extreme changes in
temperature that can result in condensation inside the reservoir.
• Dirty or dusty environments that may contaminate the oil.
Change the oil as described in the following steps:
1. Be sure that cylinder is fully retracted.
2. Remove the jack rear access cover. Refer to Section 7.1.
3. Completely relieve any trapped pressure in the jack hydraulic
and pneumatic systems. Disconnect the air supply hose
from the air shut-off valve. Follow procedure in Section 7.2.
NOTICE The hydraulic reservoir holds approximately 5 gallons
[18,9 liter] of oil when fi lled to the proper level with cylinder fully
retracted and air motor off . Dispose of used oil in accordance
with all applicable laws and regulations.
4. Loosen and remove oil drain plug at bottom of reservoir.
Allow used oil to drain into a suitable container. It may be
necessary to tip the jack back slightly to completely drain all
oil and any debris from the bottom of the reservoir.
5. Clean and reinstall oil drain plug.
6. Remove, clean and reinstall the reservoir air breather.
Replace the air breather if clogged or damaged.
7. Using a strap wrench, unscrew and remove the old oil fi lter.
Catch any spilled oil in a suitable container. Dispose of spilled
oil in accordance with all applicable laws and regulations.