7
Table 7 - U-Ring Information
Jack Model
U-Ring Size and Model Number
U-Ring
Set Model
Number
Items Included in Each U-Ring Set
1 inch
[25 mm]
3 inch
[76 mm]
4-1/2 inch
[114 mm]
5-1/2 inch
[140 mm]
10 inch
[254 mm]
2x
1x
2x
1x
PRAMA06014L
PRU11
PRU13
PRU14
-
PRU110
PRUS126
PRU11
PRU13
PRU14
-
PRAMA06027L
PRU11
PRU13
PRU14
-
PRU110
PRUS137
PRU11
PRU13
PRU14
PRU110
PRAMA10016L
PRU11
PRU13
PRU14
-
PRU110
PRUS126
PRU11
PRU13
PRU14
-
PRAMA10027L
PRU11
PRU13
PRU14
-
PRU110
PRUS137
PRU11
PRU13
PRU14
PRU110
PRASA10016L
PRU11
PRU13
PRU14
-
PRU110
PRUS126
PRU11
PRU13
PRU14
-
PRASA10027L
PRU11
PRU13
PRU14
-
PRU110
PRUS137
PRU11
PRU13
PRU14
PRU110
PRASA15016L
PRU151
PRU153
-
PRU155
PRU1510
PRUS1526
PRU151
PRU153
PRU155
-
PRASA15027L
PRU151
PRU153
-
PRU155
PRU1510
PRUS1537
PRU151
PRU1510
PRU155
-
PRASA20016L
PRU201
PRU203
-
PRU155
PRU1510
PRUS2026
PRU201
PRU203
PRU205
-
PRASA20027L
PRU201
PRU203
-
PRU155
PRU1510
PRUS2037
PRU201
PRU2010
PRU205
-
5. Slowly lower the cylinder rod until the weight of the load
is supported by the U-Rings. Refer to the information in
Section 5.3 for jack operating instructions.
IMPORTANT:
Follow all applicable work rules and regulations
in eff ect at your facility or worksite. The use of auxiliary stands,
blocking or other additional load supports may be required even
when U-Rings are installed.
Assembled View
Load
Support
Ring
Load
Cap
Steel U-Ring
(top)
Recess of U-Ring
Steel U-Ring
(bottom)
Aluminum U-Rings
Locator (on each
U-Ring and at
top of cylinder
housing)
Figure 5, U-Ring Stacking Arrangement (typical)
6.0 MAINTENANCE
6.1 Maintain Oil Level in Hydraulic Reservoir
Check the hydraulic oil level every 30 days. Oil level should be
approximately 1 inch [25 mm] below top of reservoir, with cylinder
fully retracted and motor off .
If oil level is low, add Enerpac HF hydraulic oil as required. If
Enerpac HF is not available at the work site, use an equivalent
hydraulic oil that meets the specifi cations shown in Table 8.
Table 8 - Oil Specifi cations
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
Paraffi
nic Base Color
Blue
CAUTION:
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.
IMPORTANT:
Be sure that the oil is clean. If the oil has a milky,
cloudy or dark appearance, it should be changed immediately as
described in Section 6.2.
6.2 Changing the Oil (See Figure 6)
Change the oil at least every 12 months.
Note:
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.
