Giant GP7128 user manual

User manual for the device Giant GP7128

Device: Giant GP7128
Category: Water Pump
Manufacturer: Giant
Size: 0.19 MB
Added : 7/13/2013
Number of pages: 12
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Summaries

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Abstracts of contents
Summary of the content on the page No. 1

Triplex Ceramic
Plunger Pump
Operating Instructions/
Model
Repair and Service Manual
GP7128
Contents:
Installation Instructions: page 2
Pump Specifications: page 3
Exploded View: page 4
Parts List/Kits page 5
Repair and Service: pages 6-8
Torque Specs: page 8
Trouble Shooting Chart: page 9
Recommended Spare
Parts List: page 10
Dimensions: page 11
Warranty Information: back page

Summary of the content on the page No. 2

INSTALLATION INSTRUCTIONS Installation of the Giant Industries, Inc., pump reduce system pulsation. Dampeners can also is not a complicated procedure, but there are reduce the severity of pressure spikes that occur some basic steps common to all pumps. The in systems using a shut-off gun. A dampener following information is to be considered as a must be positioned downstream from the un- general outline for installation. If you have loader. unique requirements, please contact Giant Industrie

Summary of the content on the page No. 3

Specifications Model GP7128 Flow ..................................................................... 17.9 GPM ..................... 67.7 Liters/minute 1 1 Discharge Pressure ............................................. 5800 PSI ......................................400 Bar Crankshaft Speed ....................................................................................... 750 RPM Inlet Pressure (maximum) ................................... -4.35 to 145 PSI ........... -0.3 to 10 Bar Plun

Summary of the content on the page No. 4

Exploded View - GP7128 Pump 4

Summary of the content on the page No. 5

GP7128 PARTS LIST ITEM PART DESCRIPTION QTY. ITEM PART DESCRIPTION QTY. 1 07600 Crankcase 1 38A 12055 O-Ring, Seal Case 3 2 13000 Oil Filler Plug Assembly 1 38B 07693 Support Ring for 38A 3 4 07601 Crankcase Cover 1 38C 07354 O-Ring for 39 3 5 07602 Seal for Cover 1 38D 12056 Support Ring for 38C 3 8 07603 Oil Dip Stick 1 39 06426 Seal Sleeve 3 9 01009 O-Ring, Dip Stick 1 39A 13228 Grooved Ring 3 10 22706 Inner Hexagon Screw 12 41 13417 Pressure Ring 3 11 06725 Spring Washer 12 42 13369 V-Sleeve

Summary of the content on the page No. 6

GP7128 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 3. Valve seats (51C and 52C) plugs (58) out of valve cas- assemblies (51 and 52) us- are pressed out of spacer ing with two screws. ing either tool (part pipe (51F) by hitti

Summary of the content on the page No. 7

GP7128 Repair Instructions 8. Separate plunger (36) from 9. Pull seal sleeves (39) out of crosshead (25) by means of their fittings in the crank- one open-end wrench. case. Take seal case (38) out of seal sleeve (39). 38D 38A 38B 38 38B 38A 36 38C 10. If o-rings (38A and 38C) or support rings (38B and 38D) are damaged, replace with new parts. Examine plunger (36) for wear. 39A 39 41 42 43 45 11. Take a thin screw driver and pry out the grooved ring (39A). Note: This seal (39A) will no

Summary of the content on the page No. 8

GP7128 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: Rep

Summary of the content on the page No. 9

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

Summary of the content on the page No. 10

Preventative Maintenance Check-List & Recommended Spare Parts List Check Daily Weekly 50hrs Every Every Every 500 hrs 1500 hrs 3000 hrs Oil Level/Quality X Oil Leaks X Water Leaks X Belts, Pulley X Plumbing X Recommended Spare Parts Oil Change (1 Gallon) p/n 1154 X X Plunger Packing Kits (1 kit/pump) X (See page 5 for kit list) Valve Assembly Kit (1 kit/pump) X (See page 5 for kit list) Oil Seal Kit (1 kit/pump) X (See page 5 for kit l

Summary of the content on the page No. 11

GP7128 Dimensions - Inches (mm) 11

Summary of the content on the page No. 12

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 a


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