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Triplex Ceramic
Plunger Pump
Operating Instructions/
Repair and Service
Manual
Models
LP122A Series/LP123/LP255
For Models:
LP122A
LP122A-3100
LP122A-4000
LP123
LP255
Contents:
Installation Instructions: page 2
Pump Specifications: page 3-4
Exploded View: page 5
Parts List: page 6
Kit List/Torque
Specifications: page 7
Repair Instructions: pages 8-10
Dimensions: page 11
Warranty Information: back page
Updated 5/01
Summary of the content on the page No. 2
INSTALLATION INSTRUCTIONS Installation of the Giant Industries, Inc., pump is not a 4. Use of a dampener is necessary to minimize pulsation at complicated procedure, but there are some basic steps drive elements, plumbing, connections, and other system common to all pumps. The following information is to areas. The use of a dampener with Giant Industries, Inc. be considered as a general outline for installation. If pumps is optional, although recommended by Giant you have unique requirements
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Specifications Models LP122A Series/LP123 Volume ............................................................................................... Up to 39.0 GPM (147.6 l/m) Discharge Pressure ............................................................................ Up to 2000* PSI (138* Bar) Inlet Pressure ..................................................................................... Up to 90 PSI (6.2 Bar) Speed ...........................................................................
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Specifications Model LP255 Volume ............................................................................................... Up to 26.0 GPM (147.6 l/m) Discharge Pressure ............................................................................ Up to 2200* Inlet Pressure ..................................................................................... Up to 90 PSI Speed ................................................................................................. Up to 1000 RPM Pl
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Exploded View - LP122A Series/LP123/LP255 5
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LP122A SERIES/LP123/LP255 PARTS LIST A = LP122A B = LP123 C = LP122-4000 D = LP122A-3100 E = LP255 ITEM PART NO. DESCRIPTION QTY. ITEM PART NO. DESCRIPTION QTY. 1 07759 Crankcase 1 35B 13141 O-Ring (E only) 3 2 13000 Oil Filler Plug 1 36 13415 V-Sleeve, Weep (A-D) 3 4 06085 Crankcase Cover 1 36 13025 V-Sleeve, Weep (E) 3 5 07104 O-Ring 1 36A 13416 Pressure Ring, Weep, (A, B, C) 3 6 07186 Oil Sight Glass W/Gasket 1 36A 13416-0100 Pressure Ring, (D) 3 8 06086 Oil Dipstick 1 36A 06700 Pressure Ring
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LP122A SERIES/LP123/LP255 PUMP REPAIR KITS Plunger Packing Kit Valve Assembly Kit # 09477 (LP122A, LP123, LP122A-4000) LP122A. LP123, LP122A-4000, LP255 (for pumps manufatured after 4/98) #09136 Item Part # Description Qty. Item Part # Description Qty. 35A 07740 O-ring 3 46A 07751 Valve Assembly, Complete 3 36 13415 V-Sleeve, Weep 3 48A 12055 O-Ring 3 40 07745 V-Sleeve 6 Plunger Packing Kit Valve Assembly Kit # 09535 (LP255) LP122A-3100 Item Part # Description Qty. #09305 35A 07740 O-ring 3 Item
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LP122A Series/LP123 - Repair Instructions 44A 44 45 48 47 1. With a 30mm wrench, re- 2. To disassemble the valve, screw the bolt into the retainer until move the six (6) plugs (48) the valve plate (45) presses the valve seat (44) out of the spring from the valve casing (43). retainer. Examine all parts and replace if necessary. If the seat Inspect the o-rings (48A) doesn’t come out, use a valve puller to remove. and replace if necessary. Remove the complete valve assembly (46A) by thread- ing a
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oil. 7. For LP122A & LP122A-4000 pumps, oil seal replacement 8. The back-up seal (33) can be 9. The front oil seal (31A) can can be accomplished by pull- pried out of the back of the now be removed by inserting a ing the retainer forward out of retainer (32) with a small screwdriver through the rear the crankcase. The o-ring screwdriver. To replace with of the retainer and tapping the around the outside of the re- new seal, lubricate edges of seal out through the front of tainer should be replac
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36A 36 35 35A 35B (LP255 only) 39 12. Lubricate weep seal (36). Place, weep seal (36), and pressure ring (36A) 13. For LP255 pumps, insert sup- into the seal sleeve (35). Assemble the o-ring (35A and 35B for LP255 port ring (37) into valve casing only) onto seal sleeve and lubricate. (43). Place support ring (41) and v-sleeves (40) into valve casing. 7 6 4 2 1 3 8 5 14. Press seal sleeve assembly into against the crankcase. the manifold and seat firmly. 15. Place entire manifold/seal 16. Tighten
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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 a
