Flowserve Heavy Duty Hydraulic Overrides - Manual (Page 3)

Checking Oil Level
1.
Actuator should be in full CW position for DA ac-
tuator or failed position for SR actuator.
2. Remove cap from oil reservoir and check oil
level.
3. Oil level should be 2-3 inches from top of reser-
voir. If required, add hydraulic fluid to reservoir to
reach this level.
Pump/Oil Specifications
Temperature: 0°F to 300°F
Oil Type: Fire resistant, Nuclear Approved hydraulic
fluid, such as Exxon Firexx HS68. Consult
factory for seal compatibility and temperature
ranges of other fluids.
Oil Volume:
Actuator SR/DA Volume (gal)
RN2 SR 1/2
DA 1/2
RN3 SR 1/2
DA 3/4
RN4 SR 1
DA 1 1/2
Pump Pressure: DA 1500 psi
SR 3500 psi
Number of strokes to override:
Actuator SR/DA # Pumps
RN2 SR 17
DA 9
RN3 SR 45
DA 25
RN4 SR 132
DA 74
B00151-0 Page 3 of 4
11444 Deerfield Road
Cincinnati, Ohio 45242
(513) 489-7800
FAX (513) 489-5243
Heavy Duty Hydraulic Override
Nuclear Qualified Actuator
Bolt Torques
Piston Bolt (3) (SAE Grade 8 Bolt)*
Actuator Size Bolt Size Torque Range
RN2 3/4"-10 UNC 271-320 ft.lb.
RN3 1 1/4"-7 UNC 537-591 ft.lb.
RN4 1 1/4"-7 UNC 1014-1116 ft.lb.
* Not present in SR overrides
Tie Rod (7) (A311 Stressproof Rod)
Actuator Size Bolt Size Torque Range
RN2 5/8"-11 UNC 117-130 ft.lb.
RN3 3/4"-10 UNC 207-229 ft.lb.
RN4 1"-8 UNC 249-270 ft.lb.
Adapter Nut (12) and Stud (ASTM A193 Gr. B7)*
Actuator Size Bolt Size Torque Range
RN2 1/2"-13 UNC 64-71 ft.lb.
RN3 3/4"-10 UNC 226-249 ft.lb.
RN4 1"-8 UNC 546-603 ft.lb.
*Not present in SR Overrides