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Triplex Ceramic
Models
Plunger Pump
Operation Manual
GP7145GB and GP7255AGB
pump with gearbox
Contents:
Installation and Safety Instructions page 2
Pump Specifications (GP7145GB-2.4): page 3
Exploded View: page 4
Parts List: page 5
Pump Specifications (GP7255AGB-2.4): page 6
Kits/Torque Specifications: page 7
Maintenance Information: page 7
Repair Instructions: pages 8-9
Troubleshooting Guide: page 10
Dimensions: page 11
Updated 10/07
Warranty Information back page
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INSTALLATION INSTRUCTIONS IMPORTANT! The service life of the seals is maximized Operation and Maintenance if a minimal amount of leakage is present. A few drops of Check oil level prior to starting and ensure trouble-free water can drip from each plunger every minute. Leakage water supply. has to be examine every day. If the leakage becomes excessive (constant dripping), the plunger seals must be Oil: Use only 2 gallons (7.5 liters) if ISO VG-220 changed. synthetic gear oil. Initial change
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Specifications Model GP7145GB -2.4 U.S. ...............................(Metric) Volume (Continuous).............................................................. 47.5 GPM .....................(180 LPM) Volume (Intermittent) ............................................................. 60 GPM* ......................(227 LPM)* Discharge Pressure ................................................................. 3000 PSI .......................(207 bar)* Speed (Continuous) ..........................
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Exploded View - GP7145GB-2.4/GP7255AGB-2.4 4
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PARTS LIST - GP7145GB-2.4/GP7255AGB-2.4 ITEM PART DESCRIPTION QTY. ITEM PART DESCRIPTION QTY. 1 05324 Crankcase 1 39A 07723 Grooved Ring, GP7255A 3 1A 05313 Head for Oil Dipstick 1 40 07797 Support Disc, GP7255 only 3 1B 01009 O-Ring 1 41 13296 Support Ring, GP7145 3 2 13000 Oil Filler Plug Assy. 1 41 13158 Support Ring, GP7255A 3 4 07601 Crankcase Cover 1 42 13294 V-Sleeve, GP7145 9 5 07602 Gasket, Crankcase Cover 1 42 07711 V-Sleeve, GP7255A 6 8 07603 Oil Dip Stick 1 43 13293 Pressure Ring, GP
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Specifications Model GP7255AGB-2.4 U.S. ...............................(Metric) Volume (Continuous).............................................................. 65.8 GPM .....................(250 LPM) Volume (Intermittent) ............................................................. 80 GPM* ......................(303 LPM)* Discharge Pressure (Continuous) ........................................... 1500 PSI .......................(100 bar) Discharge Pressure (Intermittent) .....................
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Repair Kits - GP7145GB-2.4 and GP7255AGB-2.4 Plunger Packing Kit - GP7145GB-2.4 Plunger Packing Kit - GP7255AGB-2.4 # 09603 # 09220 Item Part # Description Qty. Item Part # Description Qty. 38A 13156 O-Ring 3 38A 13156 O-Ring 3 38B 06258 O-Ring 3 38B 07721 O-Ring 3 39A 13290 Grooved Ring 3 39A 07723 Grooved Ring 3 42 13294 V-Sleeve 9 41 13158 Support Ring 3 42 07711 V-Sleeve 6 Valve Repair Kit Oil Seal Kit # 09604 # 09221 Item Part # Description Qty. Item Part # Description Qty. 51B 07732-0100
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GP7145GB-2.4 and GP7255AGB-2.4 Repair Instructions TO CHECK VALVES Loosen plugs (58), take out tension spring (57) and then remove the complete valve assembly (51) with either a valve tool or an M16 hexagon screw. To remove the valve adapter (56) and tension spring (57), use a pullout tool size 5. To disassemble valve assembly, carefully hit the top of the valve plate (51C) with a metal dowel and press the valve seat (51E) out of the valve adapter (56). Check sealing surfaces and replace worn
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GP7145GB-2.4 and GP7255AGB-2.4 Repair Instructions TO DISMANTLE REDUCTION GEAR Remove screws (G4). Using screwing two screws into the both thread bores, press off the gear cover (G2). Remove screw (G11) and take off the spacer ring (G7) and tension disc (G10). Push the cogwheel (G9) off the shaft by screwing two screws into both thread bores. Finally, take the crankshaft (22) out of the crankcase by tapping it towards the bearing cover side using a rubber hammer. Check the surfaces of conne
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PUMP SYSTEM MALFUNCTIONS MALFUNCTION CAUSE REMEDY The Pressure and/ Worn packing seals Replace packing seals or the Delivery Drops Broken valve springs Replace springs Belt slippage Tighten or Replace belt Worn or Damaged nozzle Replace nozzle Fouled discharge valve Clean valve assembly Worn or Plugged relief valve on pump Clean, Reset, and Replace worn parts Cavitations Check suction lines on inlet of pump for restrictions Unloader Check for proper operation Water in Crankcase High Hum
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Dimensions - GP7145GB-2.4 and GP7255AGB-2.4 - Inches (mm) 11
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GIANT INDUSTRIES LIMITED WARRANTY Giant Industries, Inc. pumps and accessories are warranted by the manufacturer to be free from defects in workmanship and material as follows: 1. For portable pressure washers and self-service car wash applications, the discharge manifolds will never fail, period. If they ever fail, we will replace them free of charge. Our other pump parts, used in portable pressure washers and in car wash applications, are warranted for five years from the dateof shipment for
