P16VM series - Variable Displacement Piston Pumps - P16VMR-10-MC2C-CC-P7HP10-25-S121-J (N5.5)

Installation and Shaft Alignment

• The base for the electric motor and pump should offer sufficient rigidity. Vibration absorbing construction is recommended.
• Flexible type coupling is recommended to join the drive shaft of the prime mover and the pump shaft. (DO NOT USE tire shaped coupling)
• Recommended shaft alignment value, TIR (Total Indicator Reading) is below 0.05mm.
• Poor shaft alignment may cause shaft damage, heat and friction of bearings, leakage from oil seals, pump noise and vibration, etc. Thus shaft should be aligned with care.
• In principle, there should be no external radial or thrust loads on shaft ends. Please consult Tokyo Keiki if belt, chain, or gear couplings are to be used.
• Care should be paid that no air remains in the pump case. Pump should be mounted with drain port facing upward. Pump shaft should be installed horizontally

Piping and Filtration

• Filtration On the suction side, a 100 µm (150 mesh) or equivalent tank filter (suction filter) should be used. On the delivery side, a full flow filter which provides filtration of less than 20 µm or bypass filter which provides filtration of less than 10 µm should be installed.
• Suction pressure (gauge pressure) - For mineral oil based fluid, pressure should be in the range +35 ~ -16.7 kPa and for water glycol based fluid, +35 ~ -10.1 kPa
• Suction path flow velocity should be kept at less than max. 1.5 m/s.
• Suction, return piping - Stipulated suction pressure should be considered and suction resistance should be kept as low as possible.
  • Use large diameter pipe with as few bends as possible.
  • Height from pump suction port to tank standard oil level should be less than 1 m.
  • Distance from suction piping end to tank bottom should be more than 50 mm.
• Air in system causes noise, vibration, and parts damage. As air can easily be drawn in through suction piping, care should be paid to ensure that joints, especially, are airtight.
• The end of the return pipe should always be below the oil level regardless of fluctuations in oil level.
• A baffle should be installed in the tank between the suction and return lines.
• Use of flexible rubber hose piping instead of steel piping for pump suction, delivery, and drain lines provides effective vibration dampening and reduces noise.

Drain piping

• Pressure in pump case should not exceed 50 kPa.
• Drain piping should be installed on the upward side of the pump and the pump case should always be filled with fluid.
• Drain line should be led to tank separate and should not be mixed with the flow from the return piping and should be installed so that it is set apart from the suction pipe and should also extend below the oil level in the tank

Cautions at Operation Startup

• Filling oil
  • Pump should be filled with clean fluid through the drain port and fill ports and the pump case should be filled completely.
  • Improper or insufficient fluid filling will lead to pump problems. In the case of the PH**F series, proceed with lubrication immediately prior to starting up the pump.
• Air bleed
  • At startup of pump operation, pump should be run at no load, maximum flow until air is completely bleed from piping and pump case. Effective air bleed can be accomplished if an air bleed valve is installed on the pump delivery side. For details on the air bleed valve, see page R3-1.
• Warm up
  • During startup, if viscosity is higher than proper viscosity (54 mm2/s), system should be warmed up with pressure less than half of maximum working pressure until viscosity falls below 54 mm2/s

Hydraulic fluid

• Note that pump specifications such as maximum working pressure and maximum speed may differ with the type of hydraulic fluid used. See Appendix 1 regarding hydraulic fluid selection.
• Mineral oil based fluid
  • General industrial anti-wear hydraulic fluid is recommended.
• Water glycol based fluid
  • Do not use this fluid with the standard pump intended for mineral oil based fluids.
  • Consult Tokyo Keiki regarding specifications for pump using this fluid.

Hydraulic fluid viscosity and temperature

• Pump should be operated with hydraulic fluid viscosity range of 13 ~ 54 mm2/s. At pump startup a maximum viscosity of 860 mm2/s is allowed however care should be paid to observe the section 'Cautions at Operation Startup' regarding warm up of hydraulic fluid.
• Hydraulic fluid temperature range should be 0 ~ 60°C

Pump Control Adjustment

• Pressure compensator control
  • Turning the compensator adjustment screw clockwise will increase the setting pressure, turning it counterclockwise will decrease the setting pressure.
• Maximum displacement adjustment function
  • This function allows adjustment of full flow displacement.
  • Turning the adjustment screw clockwise will decrease the full flow displacement, turning the screw counterclockwise will increase the displacement.