EM-0146-8
- -
23
3.5.3 Pipe tightening
The pipe tightening torque is shown in Table 3.5c.
Table 3.5c Screw Size and Tightening Torque
Model
Screw Size
Tightening Torque[Nm]
Discharge Pipe
ASE3/5/10-
Port Flange Screw: JIS B1176
Hexagon Socket Head Cap Screw
M10 (Strength Grade: 12.9)
61 to 74
Suction Pipe
ASE3/5/10-
Port Flange Screw: JIS B1176
Hexagon Socket Head Cap Screw
M12 (Strength Grade: 12.9)
104 to 127
ASE3/5-
Rc1/2
52 to 95
Drain Pipe
ASE10-
Rc3/4
90 to 165
When using four screws for the suction pipe flange, tighten them gradually and evenly in the order
shown by the numbers 1 to 4 in Fig. 3.5a and repeat this cycle two or three times.
When using steel pipes, they may place excessive load on the motor-driven pump unit, resulting in
noise. If there is a possibility that steel pipes may place such load on the unit, use rubber hoses.
Apply the pipe tightening torque as specified. Failure to do so may cause damage to the
screws or outflow of hydraulic fluid, resulting in a major accident.
Do not tighten the screws with the O-rings mounted improperly. Doing so may cause
damage to the O-rings or outflow of hydraulic fluid, resulting in a major accident.
WARNING
WARNING
Fig. 3.5a Screw Tightening
