PU642 | Buyers Products 4-Way DC Power Unit Electric Controls

• Manual or Push Button: Push Button
• Mounting Position: Horizontal
• Reservoir Material: Glass Filled Nylon
• Motor Horsepower: 2 HP
• Reservoir Volume: 0.86 Gal
• Pressure Rating: 2500 PSI
• Motor Voltage: 12 VDC
• Width: 6.60"
• Length: 17.38"
• Height: 7.50"
• Spool Action: Power Up/Power Down
• Number of Cartridge Valves: 2
• Outlet Port Size: 3/8 NPT
• Controller Included: Y
• Control Cable Length: 72"
• Motor Power (KW): 1.5

• Power hydraulic systems independently
  • Uses a 12V or 24V battery to run a hydraulic pump.
  • No need for a PTO (power take-off) or running the engine hydraulics.
• Control hydraulic motion
  • Electric controls activate:
    • Raise/lower functions
    • Extend/retract cylinders
    • Dump, lift, or tilt operations
• Make operation simple and remote
  • Allows operation through:
    • Dashboard switches
    • Handheld pendants
    • Wireless remotes (on some systems)
• Improve efficiency and convenience
  • Quick activation without mechanical linkages.
  • Faster setup and operation of hydraulic equipment.
• Support mobile hydraulic applications
  • Enables hydraulics on trailers or equipment that don’t have engine-driven hydraulics.

1. No response when switching functions

• Pressing the control switch does nothing.
• No motor sound, no hydraulic movement.
• Often caused by:
  • Blown fuse
  • Bad switch
  • Failed relay or contactor
  • Broken wiring or poor ground

2. Motor doesn’t run (or only clicks)

• You hear a click from a relay, but the pump motor doesn’t start.
• Possible causes:
  • Burnt relay contacts
  • Weak battery voltage
  • Bad solenoid/contactor
  • Failed control switch

3. Motor runs but hydraulics don’t operate correctly

• Pump runs, but:
  • Cylinder doesn’t move
  • Movement is slow or weak
• Could indicate:
  • Solenoid valve not switching
  • Electrical control not activating the correct direction valve

4. Intermittent operation

• Works sometimes, fails other times.
• Functions may cut in/out randomly.
• Often caused by:
  • Loose wiring
  • Corroded connectors
  • Worn switches
  • Failing relay coils

5. Stuck hydraulic direction (won’t raise or lower)

• Equipment only moves one direction.
• Or won’t switch between extend/retract.
• Common causes:
  • Directional solenoid stuck or not receiving power
  • Faulty control switch circuit

6. Burning smell or overheated wiring

• Electrical smell near control box or pump.
• Melted insulation or discolored wires.
• Usually caused by:
  • Short circuits
  • Overloaded relay
  • Sticking motor causing high current draw

7. Slow or weak operation

• Pump runs but feels underpowered.
• Movement is sluggish.
• May indicate:
  • Low voltage reaching motor due to bad controls
  • Poor relay contacts causing voltage drop

8. Blown fuses or tripped breakers

• Fuse keeps blowing when trying to operate system.
• Indicates:
  • Short in wiring
  • Failed solenoid coil
  • Motor or control circuit drawing too much current

9. Control switch feels “dead” or loose

• No click or resistance when pressed.
• Works only when held at certain angles.
• Internal switch contacts may be worn out.