Models Triplex Ceramic Plunger Pump Operation Manual GP7145GB and GP7255AGB pump with gearbox Updated 10/07 Contents: Installation and Safety Instructions Pump Specifications (GP7145GB-2.4): Exploded View: Parts List: Pump Specifications (GP7255AGB-2.
INSTALLATION INSTRUCTIONS Operation and Maintenance Check oil level prior to starting and ensure trouble-free water supply. Oil: Use only 2 gallons (7.5 liters) if ISO VG-220 synthetic gear oil. Initial change after 50 hours and then after every 200 operating hours. If used less than this, change once per year. IMPORTANT! When operating in humid areas (or areas with large temperature fluctuations, the oil must be changed immediately (if condensate or frothy oil occurs in the gear box).
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) .................................
Exploded View - GP7145GB-2.4/GP7255AGB-2.
PARTS LIST - GP7145GB-2.4/GP7255AGB-2.
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) ............................
Repair Kits - GP7145GB-2.4 and GP7255AGB-2.4 Plunger Packing Kit - GP7145GB-2.4 # 09603 Item Part # Description 38A 13156 O-Ring 38B 06258 O-Ring 39A 13290 Grooved Ring 42 13294 V-Sleeve Valve Repair Kit # 09604 Item Part # 51B 07732-0100 51C 05314 51D 05136 51E/56D 07653 51F/56C 13166 56A 07658 56B 07635 Description Valve Spring Valve Plate Valve Seat O-Ring Support Ring O-Ring Support Ring Plunger Packing Kit - GP7255AGB-2.4 # 09220 Item Part # Description Qty.
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 parts.
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.
PUMP SYSTEM MALFUNCTIONS MALFUNCTION CAUSE REMEDY The Pressure and/ or the Delivery Drops Worn packing seals Replace packing seals Broken valve springs Belt slippage Worn or Damaged nozzle Fouled discharge valve Worn or Plugged relief valve on pump Unloader Replace springs Tighten or Replace belt Replace nozzle Clean valve assembly Clean, Reset, and Replace worn parts Check suction lines on inlet of pump for restrictions Check for proper operation Water in Crankcase High Humidity Worn Seals Reduc
Dimensions - GP7145GB-2.4 and GP7255AGB-2.
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.