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User manual Giant, model GP7132

Manafacture: Giant
File size: 392.79 kb
File name: 227375fb-173a-4832-8f5b-9d348f75cd29.pdf

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Gas engine power outputs must be approximately twice the pump power requirements shown above. We recommend a 1.1 service factor be specified when selecting an electric motor as the power source. To compute specific pump horsepower requirements, use the following formula: GPM X PSI 6 GP7132 AND GP7136 REPAIR INSTRUCTIONS NOTE: Always take time to lubricate all metal and non-metal parts with a light film of oil before reassembling. This step will help ensure proper fit, at the same time protecting the pump non-metal parts (elastomers) from cutting and scoring. 1. Lossen screws (58C), take 2. Take out complete valve plugs (58) out of valve cas- (51) using either tool (part ing with two screws. #07662) or stud bolt. 3. Valve seats (51C and 52C) are pressed out of spacer pipe (5 IF) by hitting the valve plate (5 ID) with a bolt. 51F 51E 51C or 52C 51B I 51A 51C or 52C 4. Check surfaces of valve plate, valve seat, O-rings (51B, 58A) and replace worn parts. 6. Loosen nuts (49A) ^9 yd 'Sg& 7. Remove pump head. 5. When reassembling: The suction valve seat (51C) is 1mm smaller in diameter than the discharge valve seat (52C). Suction valve seats are marked "S" and always have to be installed first. Discharge valve seats are marked "P" and are always tobe installed on top of suction valve. Plugs (58) are to be tensioned down evenly with screws (58C) and crosswise at 155 ft-lbs. 7 GP7132 AND GP7136 REPAIR INSTRUCTIONS Separate plunger (36) from crosshead (25) by means of one open-end wrench. 9. Pull seal sleeves (39) out of their fittings in the crankcase. Take seal case (38) out of seal sleeve (39). ooboo I I I I I 38A 38B 38 38B 38A 10. Ifo-rings (38A) or support rings (38B) are damaged, replace with new parts. Examine plunger (36) for wear. ooolà \/ ' ' 39A 39 41 42 43 45 11. Take a thin screw driver and pry out the grooved ring (39A). Note: This seal (39A) will not be reusable, so replace with a new part. For the seal-pack (41 -43), remove with either a socket wrench or use a screw driver to push against the rear lip of the pressure ring (41) or v-sleeves (42). You will need to remove seals evenly out of the seal sleeve (39). Be careful not to score the sleeve or metal parts (41 & 43). GP7132 AND GP7136 REPAIR INSTRUCTIONS CAUTION: Don't loosen the 3 plunger (36) before the valve casing has been removed otherwise the plunger (36) could hit against the spacer pipe (51F) when the pump is being turned. Seal life can be increased if the pretensioning allows for a little leakage. This assists lubrication and keeps the seals cool. It is therefore not necessary to replace seals before the leakage becomes too heavy and causes output and operating pressure to drop. MOUNTING VALVE CASING NOTE: Replace worn parts; grease seals with silicone before installing. 12. Check O-rings (38A) and support rings (38B) on seal case (38). Clean surfaces of seal sleeves in gear box and sealing surfaces of valve casing. Reassemble seal sleeve (39) by placing plunger (36) in seal sleeve; place pressure ring (41), v-sleeves (42), sleeve support ring (43), and tension spring (45) over plunger (36). Place the seal case onto the seal sleeve and press into the crankcase, making sure that the weep hole on the seal sleeve is facing down. Tighten tensioning screw (36C) for plunger onto crosshead (25) with an open end wrench to 26 ft-lbs. 13. Push valve casing carefully onto O-rings of seal case and centering studs (50A). Tighten nuts (49A) to103 ft-lbs. TO DISASSEMBLE GEAR 14. Take out plunger (36) and seal sleeves (39) as described above. Drain oil. 15. After removing the circlip ring (33B), lever out seal retainer (33) with a screw driver. Check seals (32,32A,33A) and surfaces of crosshead. 16. Remove crankcase cover (4). Loosen inner hexagon screws on the connecting rods (24) and push con rod halves as far into the crosshead guide as possible. CAUTION: Connecting rods are marked for identification. Do not twist con rod halves. Con Rod is to be reinstalled in the same position on shaft journals. 17. Check surfaces of connecting rod and crankshaft (22). Take out bearing cover (14) to one side and push out crankshaft taking particular care that the connecting rod (24) doesn't bend. CAUTION: Seal (32A) must always be installed so that the seal-lip on the inside diameter faces the oil. Reassemble in reverse order: Regulate axial bearing clearance - minimum 0.1mm, maximum 0.15mm-by means of fitting disc (20A). The crankshaft (22) should turn easily with little clearance. Tighten fitting screws (24A) to 30 ft.-lbs. CAUTION: Connecting rod (24) has to be able to be slightly moved sidewise at the stroke journals. GP7132 and GP7136 TORQUE SPECIFICATIONS Position Item# DescriDtion Toraue Amount 24A 07616 Fitting Screw 30 ft-lbs. 36C 07664 Tensioning Screw 26 ft.-lbs. 49A 13160 Nut 103 ft.-lbs. 58 07699 Plug 155 ft.-lbs. PUMP SYSTEM MALFUNCTION MALFUNCTION CAUSE REMEDY The Pressure and/ or the De...