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Graco 312068M manual

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Table of contents for the manual

  • Page 1

    312068M EN Repair - P ar ts Pr opor tioning Pumps Proportioning pumps and h ydraulic cylinder s used on Hydr aulic Pr opor tioners. For prof essional use only . For professional use onl y . Not f or use in explosive atmospheres. Model 247576: 2000 psi (1 3.8 MP a, 138 bar) Maxim um Working Pressure All other models: 3500 psi (24. 0 MP a, 240 bar) M[...]

  • Page 2

    Models 2 312068M Contents Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Propor t ioning Pump s . . . . . . . . . . . . . . . . . . . . . 2 Hydraulic Cylinders . . . . . . . . . . . . . . . . . . . . . . . 2 Pumplines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 In-Plant Pumplin e . . . . . . . . . . .[...]

  • Page 3

    Repair 312068M 3 Repair Flushing • Flush out old fluid with ne w fluid, or flush out old fluid with a compatib le solv ent bef ore introducing new fluid. • Use lowest possible pressur e when flush ing. • T o flush entire system, circulate through gun fluid manifold (with manifold remov ed from gun) . • Alwa ys lea v e some type of fluid in [...]

  • Page 4

    Repair 4 312068M Pumpline Disassembl y 1. Remov e plug fitting (206) from lube cylinder (205). 2. Inser t cle vis pin remov al tool 29660 7 through ope n- ing in lube cylinder (205) and screw tool into left cle vis pin (219). Pull clevis pin out of clevis (117). 3. Use he x ke y to remo ve f our soc k et head cap screw s (203) from left proportioni[...]

  • Page 5

    Repair 312068M 5 6. Attach the cle vis pin (219) to the clev is pin tool. Inser t cle vis pin through hole in lube cylinder and into the left clevis. 7. Gently tap end of cle vis pin tool with hammer to slide clevis pin (219) into place . Remov e cle vis pin tool from clevis pin. 8. Inser t f our he x head cap scre ws (203) through h oles in propor[...]

  • Page 6

    Repair 6 312068M Pump Base Disassembl y Disassemb le and clean pump base ann ually . For pumpline P7758-2557 73, disassemble and clean the pump base on e v er y six months. 1. Relie v e pressure, pag e 3. 2. T urn OFF the main disco nnect and loc k out po wer at the source. 3. Remove pump cap (19 ) from pump base (23) , and remove o-ring (6 ): a. R[...]

  • Page 7

    Repair 312068M 7 Piston and Cylinder Seals Disassembl y 1. Relie v e pressure, pag e 3. 2. T urn OFF the main disco nnect and loc k out po wer at the source. 3. Disconnect the p ump inlet and outlet lines; see y our proportioner repair manual. Re mov e the f our scre ws (30) holding the pump outlet flange (26) to the h ydraulic cyli nder . Disconne[...]

  • Page 8

    Repair 8 312068M 3. Using supplie d bolts in the cylinder seal ki ts, press seal (16) into outlet fla nge (26). Ensure seal faces cylinder . Assemble bu shing (13) throat seal (29) and gask et (17) into flange retaine r (27) and f asten to outlet f lange. 4. Ensure plate is par allel with bl ock. Carefully tighten screw s until plate is flush with [...]

  • Page 9

    Repair 312068M 9 Hydraulic Cylinder Disassembl y T ools Required • T wo - 1 in . open-end wrench • T wo - 1/2 in. open-end wrench • O-ring pick 1. Relie v e pressure, pag e 3. 2. T urn OFF the main disco nnect and loc k out po wer at the source. 3. Clamp t he hydr aulic cylin der to a fla t surface using c-clamps or another strong cla mping d[...]

  • Page 10

    Repair 10 312068M 17. Remov e the right por t bl ock and rod b ushing assembly . 18. Remove the rod bushings ( 103) from the por t bloc ks (116). 19. Using the o-ring pick, remov e all rings and se als. If the right c levi s breaks loose fr om the hy draulic piston shaft: 6. Remove the right c le vis. 7. Remove the activator plate (119) and modi fi[...]

  • Page 11

    Repair 312068M 11 7. Repeat the steps abo ve to assemb le the second rod bushing/por t bloc k assembly . Assemble Hydraulic Piston and Inser t in Cylinder 8. Place wear ring (108) in the cente r channel of h ydraulic piston (10 4). 9. With the lip f acing a wa y from the center channel, place one u-cup seal (106) in each of the remaining two channe[...]

  • Page 12

    Repair 12 312068M 18. Using the f ar , top tie -rod, attach cylindrical spacer (114) to th e right side of the assembly . 19. Attach one h exagona l spacer (113) to th e other end of the tie ro d. Do not tighten. 20. Attach one hexagonal spacer to ea ch end of the b ot- tom, near tie-rod . Do not tighten. 21. Secur e the asse mbly to a flat surface[...]

  • Page 13

    Repair 312068M 13 33. Hold the right cle vis stationary with a 1 in. open-end wrench and, b y tur ning the baffle jam nut with a 1 in. torque-wre nch, torqu e the ri ght clevis to 15 ft-lb (20 N•m) against the act ivat or plate. 34. Hold the left cle vis stationar y with a 1 in. wren ch and break the baffle jam nut loose from th e h ydraulic pis [...]

  • Page 14

    Repair 14 312068M 36. Hold th e left cle vis stationar y with a 1 in. open- end wrench to keep the c ross-holes h orizontal an d torque the baffle jam nut aga inst the hydraulic piston shaft to 15 ft-lb (20 N•m) using a tor que wrench. 37. Doubl e check th at the left cle vis cross-holes are hor - izontal and t he right clevis cross-holes are v e[...]

  • Page 15

    Parts 312068M 15 Pa r t s Pumpline 203 207 204 205 206 204 202 203 219 201 219 ti13870a 208 202 Ref Description Pumpline Assembl y 288638 288639 P7758-25577 3 Qty 201 CYLINDER, h ydraulic 295027 295027 247624 1 202 PUMP , proportioner 247375 247377 247375 2 203 SCREW , cap , soc ke t head 295824 295824 0204-5 8 204 P A CKING, o-ring 106258 106258 1[...]

  • Page 16

    Parts 16 312068M Piston and Cylinder Seals Item 25 T orque Specif ication Pump Size T orque 30 130 in-lb (14. 7 N•m) 28, 40, 48, 60 22 ft-lb (29.7 N•m) 80, 88, 9 6, 120, 140 45 ft-lb (60 .8 N•m) Apply supplied sealant to threads T orque to 75 ft-lb (101 .3 N•m) T orque to 45 ft-lb (60.8 N•m) Seal must be pressed straight into housing See [...]

  • Page 17

    Parts 312068M 17  Ref er to T ab le 1 f or part number .  Ref er to T ab le 2 f or part number .  Ref er to T ab le 3 f or par t number .  P ar ts included in Kit 261859 (p urchase separately). T able 2 . Cylinder Seal Kits; Inc ludes P arts 13, 16, 17 T able 3. Pis ton Seal Kits; Inc ludes P arts 15, 18, 25 Ref. P art Description Qty 1[...]

  • Page 18

    Parts 18 312068M Hydraulic Cylinder 101 111 103 112 110 109 121 120 122 113 116 115 106 107 104 107 105 106 108 105 109 110 112 103 111 116 101 113 114 118 119 117 102 Apply high strength thread sealant to threads. Apply primer to threads to speed cur ing. T orqu e to 15 ft-lb (20 N•m). See as sembly section f or correct procedure. On Model 24762[...]

  • Page 19

    Parts 312068M 19  P ar ts are also included in Hydr aulic Cylinder Repair Kit 296785 which can be purchased separately . Ref. P art Descripti on Qty . 101 295029 PLA TE, retainer 2 102 295030 CYLINDER 1 103  295031 B USHING, rod 2 104 29664 2 PIST O N, h ydraulic 1 105  295640 O-RING 2 106  295641 SEAL, u-cup 2 107  295642 RING, back[...]

  • Page 20

    Parts 20 312068M[...]

  • Page 21

    Technical Data 312068M 21 Te c h n i c a l D a t a Category Data Maximum wo rking pressure Mod el 247576 : 2000 ps i (13.8 MPa, 138 bar) All other models : 3500 psi (24.0 MP a, 240 bar) Maximum fluid te mperature 120°F (49°C) Viscosity range 250-1500 cent ipoise Maximum mater ial inlet pre ssure 400 psi (2.7 MP a, 27 ba r) W etted parts Carbon St[...]

  • Page 22

    All written and visual data contained in this document reflects the latest product information available at the time of publica tion. Graco reserves the right to make changes a t any time without notice. For patent information, see www.graco.com/patents. Orignal instructions. This manual contains English. MM 312068 Graco Headquarters: Minneapolis I[...]