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Giant LP122A Series, Operating Instructions/ Repair And Service Manual

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Giant LP122A Series Operating Instructions/ Repair And Service Manual Download Page 1

Models 
LP122A/LP123/LP255

Triplex Ceramic

Plunger Pump

Operating Instructions/ 

Repair and Service Manual

Contents:

Installation Instructions: 

page 2

Pump Specifications -  LP122A 

page 3

Pump Specifications - LP123: 

page 3

Exploded View: 

page 4

Parts List/Kits: 

page 5

Pump Specifications - LP255: 

page 6

Troubleshooting Guide: 

page 7

Suggested Maintenance Schedule: 

page 7

Repair Instructions/Torque Specs.: 

pages 8-10

Dimensions: 

page 11

Warranty Information: 

back page

Updated 5/12 

Summary of Contents for LP122A Series

Page 1: ...uctions page 2 Pump Specifications LP122A page 3 Pump Specifications LP123 page 3 Exploded View page 4 Parts List Kits page 5 Pump Specifications LP255 page 6 Troubleshooting Guide page 7 Suggested Maintenance Schedule page 7 Repair Instructions Torque Specs pages 8 10 Dimensions page 11 Warranty Information back page Updated 5 12 ...

Page 2: ...ween the two lines on the oil dipstick DO NOT OVERFILL Use SAE 90 Industrial gear oil Giant s p n 01154 Crankcase oil should be changed after the first 50 hours of operation then at regular intervals of 500 hours or less depending on operating conditions 2 Pump operation must not exceed rated pressure volume or RPM A pressure relief device must be installed in the discharge of the system 4 Use of ...

Page 3: ...INFORMATION Pulley selection and pump speed are based on a 1725 RPM motor and B section belts When se lecting desired GPM allow for a 5 tolerance on pumps output due to variations in pulleys belts and motors among manufacturers 1 Select GPM required then select appropriate motor and pump pulley from the same line 2 The desired pressure is achieved by selecting the correct nozzle size that correspo...

Page 4: ...4 Exploded View LP122A LP123 LP255 ...

Page 5: ... 3 36B 06174 Drip Shield A B 3 37 06701 Support Disc C 3 39 07744 Pressure Ring A B 3 39 13026 Pressure Ring C 3 40 07745 V Sleeve A B 6 40 13027 V Sleeve C 6 41 07746 Support Ring A B 3 41 06702 Support Ring C 3 43 13343 Valve Casing A 1 43 06703 Valve Casing B C 1 44 07748 Valve Seat 6 44A 07150 O Ring 6 45 07749 Valve Plate 6 46 07750 Valve Spring 6 46A 07751 Valve Assy Complete 44 44A 45 46 47...

Page 6: ...or a 5 tolerance on pumps output due to variations in pulleys belts and motors among manufacturers 1 Select GPM required then select appropriate motor and pump pulley from the same line 2 The desired pressure is achieved by select ing the correct nozzle size that corresponds with the pump GPM HORSEPOWER INFORMATION We recommend that a 1 15 service factor be specified when s electing an electric mo...

Page 7: ... inlet of pump for restrictions Unloader Check for proper operation Water in crankcase High humidity Reduce oil change interval Worn seals Replace seals Noisy Operation Worn bearings Replace bearings Refill crankcase oil with recommended lubricant Cavitation Check inlet lines for restrictions and or proper sizing Rough Pulsating Worn packing Replace packing Operation with Inlet restriction Check s...

Page 8: ...ase Removethepressurerings 39 36A dripshield 36B for LP122A LP123 only v sleeves 40 36 support ring 41 and O rings 35A and 35B in LP255A only from the manifold and seal sleeve respectively For LP255 only remove support ring 37 Examine seals carefully and re place if worn Clean all parts 6 Inspect surface of plunger pipe 29B carefully Remove any chemical or mineral deposits taking care not to dam a...

Page 9: ...of loc tite 243 or equivalent adhesive to the threads Thread into steel plunger base and tighten to 26 ft lbs 35 Nm BE CERTAIN ALL PARTS ARE CENTERED WITH THE BOLT TO REASSEMBLE PROCEED AS FOLLOWS 29E 29A 29B 29D 29C LP122A LP123 LP255 Repair Instructions 8 Lubricate weep seal 36 Place weep seal 36 and pressure ring 36A into the seal sleeve 35 Assemble the O ring 35A and 35B for LP255 only onto se...

Page 10: ...ntLPpumpintoyour system Contact Giant Industries or your local distributor for mainte nance of the gear end of your pump Phone 419 531 4600 Contact Giant Industries for service school information Phone 419 531 4600 LP122A LP123 LP255 TORQUE SPECIFICATIONS Item Part Description Torque Amount 10 01010 Screw Cover 125 in lbs 14 Nm 17 07114 Hex Screw Bearing Cover 125 in lbs 14 Nm 24A 13277 Hex Screw ...

Page 11: ...11 LP122A LP123 LP255 Dimensions mm ...

Page 12: ... party 2 Normal wear and tear to standard wear parts 3 Use of repair parts other than those manufactured or authorized by Giant 4 Improper use of the product as a component part 5 Changes or modifications made by the customer or third party 6 The operation of pumps and or accessories exceeding the specifications set forth in the Operations Manuals provided by Giant Industries Inc Liability under t...

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