Repair-Parts EP3 and EP4 Hose Pumps 3A1939G EN Electric--powered hose pump for use in fluid transfer and metering applications. For professional use Electric only. Not approved for use in explosive atmospheres or hazardous locations. Important Safety Instructions Read all warnings and instructions in this manual. Save these instructions. 125 psi (0.9 MPa, 9 bar) Maximum Fluid Working Pressure See page 2 for model part numbers and information. do PROVEN QUALITY. LEADING TECHNOLOGY.
Contents Models............................................................... 2 EP3 and EP4 Hose Pump Assembly ............. 18 Bare Pump Assembly................................... 20 Pump Matrix ................................................ 22 Pump Kit Matrix ........................................... 24 Variable Frequency Drives (VFD).................. 26 Warnings ........................................................... 3 Troubleshooting..................................................
Warnings Warnings The following warnings are for the setup, use, grounding, maintenance and repair of this equipment. The exclamation point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific risks. When these symbols appear in the body of this manual or on warning labels, refer back to these Warnings. Product-specific hazard symbols and warnings not covered in this section may appear throughout the body of this manual where applicable.
Warnings WARNING ENTANGLEMENT HAZARD Rotating parts can cause serious injury. • • • • Keep clear of moving parts. Do not operate equipment with protective guards or covers removed. Do not wear loose clothing, jewelry or long hair while operating equipment. Equipment can start without warning. Before checking, moving or servicing equipment, follow the Pressure Relief Procedure and disconnect all power sources.
Warnings WARNING EQUIPMENT MISUSE HAZARD Misuse can cause death or serious injury. • Do not operate the unit when fatigued or under the influence of drugs or alcohol. • Do not exceed the maximum working pressure or temperature rating of the lowest rated system component. See Technical Data in all equipment manuals. • Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all equipment manuals. Read fluid and solvent manufacturer’s warnings.
Troubleshooting Troubleshooting NOTE: Check all possible remedies before disassembling the pump. Problem Cause Solution Hammering in piping. Inlet or outlet pipe diameters too small. Increase pipe size or add pulsation dampeners. High pump speed. Reduce speed of pump. Inlet or outlet connections not properly anchored. Secure piping. High Inlet or outlet pressures. Add pulsation dampeners. Low lubricant level. Add hose lube to the proper level. Improper lubricant.
Troubleshooting Problem Cause Solution Poor hose life. Chemical incompatibility. Consult your Graco distributor to see if you have the correct hose for your application. Normal wear. The hose may have failed due to normal wear. Replace as required. Failure due to pulsations. If you pump is equipped with a pulsation dampener, adjust its pressure. If you do not have a dampener, consult your Graco distributor. Too high outlet pressure. Check items listed in “High outlet pressure.
Repair Repair Before You Start Disassembly Drain the Oil 1. Hold a pail under the drain plug (17) and unscrew the plug to drain the lubricating oil. Dispose of the oil properly. Take care, as the oil may be contaminated by the pumped fluid. 1. Flush the pump. 2. Remove the vent plug (15) and flush the pump housing with a compatible solvent. 2. Relieve the pressure. 3. Disconnect power to the pump. 4. Make sure the pump is electrically isolated. Unexpected operation of the pump can cause serious injury.
Repair Remove the Hose 1. See Fig 5, page 11. Remove the screws holding the motor fan cover (FC). Turn the fan by hand until the roller (102) stops at the bottom of the pump housing (1) in the 6 o’clock position. NOTE: Low RPM pumps and high ratio gearboxes may require many turns of the motor fan to move the roller to the 6 o’clock position. 2. Remove the four screws (21) from each barb clamp (20) on the inlet and outlet ports of the pump and lift off the clamps. 3.
Repair Remove the Roller 1. Using external snap ring pliers, remove the roller retaining ring (9) from the front of the eccentric shaft (7). Slide the bushing (10) off the shaft. 3. On EP3 Pumps only: Slide the second bushing (10) off the shaft. Remove the second roller retaining ring (9). 4. Inspect the inside and outside diameter of the roller (102), and replace it if worn or damaged. 2. Pull the roller (102) off the shaft. It should slide off easily.
Repair Remove the Eccentric Shaft 1. Using external snap ring pliers, remove the eccentric shaft retaining ring (8) from the motor output shaft (2). See Fig 6. 2. Remove the eccentric shaft (7) from the motor output shaft. Be sure to retain the eccentric shaft key (6). NOTE: You may need to use a puller to disengage the eccentric shaft from the motor output shaft. Remove the Motor Output Shaft NOTE: The motor output shaft is held in place with a retaining ring (3) located behind the outer u-cup seal (4).
Repair Reassembly Clean and Inspect All Parts NOTICE Use only genuine Graco replacement parts. Non-standard parts will void your warranty and may damage your equipment. 2. Coat the outer races of the shaft bearings and the inner diameter of the bearing bore with light lubricating oil. Make sure there is no dirt or debris on either the bearings or the bearing bore. 3. Insert the shaft (2) into the pump housing (1) from the front, making sure that the bearings engage the bearing bore flush and straight.
Repair Figure 7 Install the Motor Output Shaft and Eccentric Shaft Key for Figure 7 Note Description 1 2 3 Lips of the u-cup (4) must face toward the shaft bearings. Lips of the u-cup (5) must face into the pump housing. Lubricate with hose lube. Install the Motor and Gearbox Install the Eccentric Shaft 1. Lubricate the motor output shaft (2) and the keyway with an anti-seize compound. 1. Ensure that the keyway on the motor output shaft (2) is facing up.
Repair Install the Roller NOTE: The roller size is typically marked on the roller. Verify that you have the correctly sized roller. 1. On EP3 Pumps only: Install a roller retaining ring (9) using external snap ring pliers. Make sure that the ring is fully seated in the groove on the eccentric shaft (7). Install a bushing (10). See Fig 8. 2. Lubricate the eccentric shaft (7) with hose lube. Slide the roller (102) onto the shaft. The roller should fit onto the shaft snugly with minimal radial movement. 3.
Repair Install the Hose 1. Move the roller (102) by turning the motor fan until the roller reaches the 6 o’clock position. Figure 11 Seat the Barbed Fitting Figure 9 Roller in 6 O’Clock Position 2. Install one end of the hose (103) through the rear port of the pump housing on the left hand side when looking at it from the front. Extend the hose 2-3 in. (51–76 mm) beyond the pump housing (1). 3. Slide the hose clamp (104) over the hose and install the barbed fitting (105). 4.
Repair Install the Front Cover 1. Scrape all debris from the gasket mating surfaces on the front cover (12) and the pump housing (1), then clean with acetone or brake cleaner to remove any residue. This is critical to ensure a leak-free assembly. NOTE: The pump housing and front cover must be free of dirt, debris and residue to ensure a leak-free seal. NOTE: The hole pattern of the front cover (12), gasket (11), and housing are asymmetric. This ensures that the gasket and cover go on in only one direction.
Notes Notes 3A1939G 17
Parts Parts EP3 and EP4 Hose Pump Assembly EP3019 and EP4029 Pumps, Series A Includes items 101–119 18 3A1939G
Parts Ref. Part No. No. Description Qty Ref. Part No. No.
Parts Bare Pump Assembly Model 24L888 Pump Assembly, Series A, for EP3019 Pumps Includes items 1–23 Model 24L889 Pump Assembly, Series A, for EP4029 Pumps Includes items 1–23 20 3A1939G
Parts Ref. No. 1 Part No. Description Qty --- 1 --- HOUSING, pump; for Pump 24L888 HOUSING, pump; for Pump 24L889 Ref. No.
Parts Pump Matrix Model EP3019 Pumps With 19 mm ID Hose and Roller Installed Hose Stripe Barbed Fitting Barbed Fitting Motor and Gearbox Kit (Ref. 105) Material Color (Ref. 107) Blue 24K592 24L988 SST Blue 24K593 Hastelloy 24L988 Pump Part Pump Series No. Hose Kit (Ref.
Parts Model EP4029 Pumps With 29 mm ID Hose and Roller Installed Hose Stripe Color Blue Blue Barbed Fitting Barbed Fitting Motor and Gearbox Kit (Ref. 105) Material (Ref.
Parts Pump Kit Matrix Model EP3019 Pump Kits With 19 mm ID Hose (installed ) and Roller (not installed) Pump Part No. Roller Kit (Ref. 102) Hose Kit (Ref. 103) Hose Inner Material Hose Stripe Barbed Fitting Kit Color (Ref. 105) Barbed Fitting Material Motor and Gearbox (Ref.
Parts Model EP4029 Pump Kits With 29 mm ID Hose (installed) and Roller (not installed) Pump Part No. Roller Kit (Ref. 102) Hose Kit (Ref. 103) Hose Inner Material Hose Stripe Color Barbed Fitting Kit (Ref. 105) Barbed Fitting Material Motor and Gearbox (Ref.
Parts Variable Frequency Drives (VFD) VFD Part No. Used With Pump Horsepower Input Voltage Output Voltage 16K909 EP3019 1.5 120 or 240 Vac (1 phase) 240 Vac (3 phase) 16K910 EP3019 1.5 208–240 Vac (1 or 3 phase) 208–240 Vac (3 phase) 16K911 EP4029 2.0 208–240 Vac (1 or 3 phase) 208–240 Vac (3 phase) 16K912 EP4029 2.
Notes Notes 3A1939G 27
Technical Data Technical Data EP3 Pumps Maximum Fluid Working Pressure Motor Horsepower/Gear Ratio U.S. Metric 125 psi 0.9 MPa, 9 bar See the Pump Matrix, page 22for the motor/gear ratio used on your pump: 1.5/35.91 1.0/100.36 50 RPM Maximum Pump Speed Maximum Environmental Temperature 122°F 50°C Minimum Environmental Temperature Maximum Flow 14°F –10°C 2.4 gpm 9.1 lpm 0.048 gal. 0.
Technical Data EP4 Pumps Maximum Fluid Working Pressure Motor Horsepower/Gear Ratio U.S. Metric 125 psi 0.9 MPa, 9 bar See the Pump Matrix, page 22 for the motor/gear ratio used on your pump: 2.0/19.70 2.0/34.29 2.0/79.72 130 RPM Maximum Pump Speed Maximum Environmental Temperature 122°F 50°C Minimum Environmental Temperature Maximum Flow 14°F –10°C 19.5 gpm 73.8 lpm 0.15 gal. 0.
Graco Standard Warranty Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.
