Repair Manual for Graco ProConnect Endurance Displacement Pump

Important Safety Information

This manual contains critical safety instructions for the repair and maintenance of the Graco ProConnect Endurance Displacement Pump. Failure to follow these instructions can result in serious injury or death. Key hazards include fire and explosion, skin injection, and pressurized aluminum parts. Always wear appropriate personal protective equipment, including eye and hearing protection, and respirators as recommended by fluid manufacturers.

Pressure Relief Procedure

This equipment remains pressurized until manually relieved. You must perform the pressure relief procedure whenever you stop spraying, before cleaning, checking, or servicing the equipment.

1. Engage the trigger lock.
2. Turn the ON/OFF switch to the OFF position and wait 7 seconds for power to dissipate.
3. Unplug the power cord or shut off the engine. For LineLazer ES 1000, disconnect the battery.
4. Engage the trigger lock.
5. Remove the tip guard.
6. Turn the pressure control to the lowest setting and disengage the trigger lock.
7. Hold a metal part of the gun firmly to a grounded metal pail and trigger the gun to relieve pressure.
8. Engage the trigger lock.
9. Open any fluid drain valves in the system and leave them open until ready to spray again.

Pump Removal

To remove the pump for service:

• Use a hammer to loosen the pump retaining nut.
• Turn the nut to free the pump rod cover and swing it open.
• Disconnect the outlet and suction hoses.
• Slide the pump out of the drive housing.

Repair and Maintenance

The manual provides detailed steps for disassembling and assembling the pump, including:

• Disassembly: Removing the packing nut, throat adjustment spacer, cylinder, intake valve, and piston rod.
• Assembly: Soaking leather packings in SAE 30W oil for one hour before assembly. Installing balls, packings, and o-rings according to the specific model requirements.
• Throat Packing Adjustment: If leakage occurs, perform the pressure relief procedure and tighten the packing nut until leakage stops.

Pump Installation

To install the pump:

• Connect the outlet hose to the pump.
• Move the pump displacement rod until it slides into the connecting rod.
• Slide the pump into the drive housing.
• Close the pump rod cover, ensuring it is flush against the housing.
• Tighten the pump retaining nut by hand, then use a hammer to turn it an additional 1/8 to 1/6 turn (45° to 60°).
• Install the suction hose.

Technical Specifications

The pump is rated for a maximum fluid working pressure of 3300 psi (228 bar, 22.8 MPa). Fluid inlet size is 1.0 in. diameter, and fluid outlet size is 1/4 in. Wetted materials include stainless steel, PTFE, leather, nylon, zinc-plated and nickel-plated carbon steel, tungsten carbide, chrome plating, UHMWPE, acetal, and polyethylene.