1. Core Overview & Target Application
This premium selection of replacement parts is precision engineered exclusively for EMSCO mud pumps, Gardner Denver FX/FXN series mud pumps, and GASO series mud pumps — the heavy-duty reciprocating mud pumps widely used in oil and gas drilling, well servicing, and directional drilling operations. Every component is manufactured to match OEM dimensional tolerances, material specifications, and pressure ratings, with full cross-reference to EMSCO, Gardner Denver (GD), and GASO original part numbers for 100% drop-in interchangeability. All pressure-containing and load-bearing components comply with API 7K (Drilling and Well Servicing Equipment) and API 674 (Reciprocating Pump) industry standards, with hydrostatic testing validated to 1.5x maximum working pressure for reliable performance in harsh drilling environments.
2. Product Introduction
This comprehensive parts catalog covers 189 critical components for EMSCO, Gardner Denver, and GASO mud pumps, spanning power end parts, fluid end parts, bearings, gaskets, seals, pistons, liners, valves, fasteners, and accessories. Key parts include jackshaft bearings, crankshaft bearings, cylinder liners, rubber pistons (4in, 6-1/2in, 7in), valve inserts/seats, gland nuts, stuffing box assemblies, crosshead components, O-rings, gaskets, and valve springs. Each part undergoes strict quality inspection: hardness testing for metal components, pressure testing for fluid end parts, and wear resistance testing for rubber pistons/seals, delivering 35% longer service life than generic aftermarket parts to support continuous heavy-duty mud pumping operations.
3. Functional Advantages
- OEM Perfect Fit: Direct dimensional and part number matching eliminates custom modifications, cutting emergency repair time by up to 65% and minimizing rig downtime during critical drilling phases.
- Stable Pressure Performance: Precision valves, pistons, and liners maintain consistent mud pressure, preventing fluid loss and ensuring reliable wellbore circulation.
- Superior Wear Resistance: Hardened metal liners, high-grade rubber pistons, and durable bearings resist abrasion from drilling mud, reducing replacement frequency and maintenance costs.
4. Structural & Material Features
All EMSCO, Gardner Denver, and GASO mud pump parts are built with drilling-grade materials to withstand extreme pressure, abrasion, and vibration, with key design attributes:
- Fluid End Components: High-chromium iron cylinder liners, wear-resistant rubber pistons, and hardened steel valve inserts for maximum abrasion resistance and pressure retention.
- Power End Components: Forged steel jackshafts, precision tapered roller bearings, and durable crosshead assemblies for smooth torque transfer and load support.
- cap screws rated for heavy-duty clamping, resisting loosening from pump vibration.
5. Applicable Operating Conditions
These spare parts are engineered for the demanding environments of EMSCO, Gardner Denver, and GASO mud pumps, including:
- Onshore land drilling rigs for mud circulation and drilling fluid transfer
- Offshore drilling platforms and jack-up rigs for high-pressure mud pumping
- Workover rigs and well servicing units for wellbore cleaning and fluid injection
- High-abrasion drilling environments with sand, shale, and heavy drilling mud
- Continuous high-pressure operation (up to 5,000 PSI) under API 7K safety standards
6. Maintenance & Troubleshooting Recommendations
To maximize the service life of mud pump components and maintain operational safety, follow these industry-standard maintenance guidelines:
- Preventive Replacement Schedule: Inspect pistons, valves, and liners every 800 operating hours; replace worn bearings, seals, and valve components every 2,000 hours to prevent catastrophic failure.
- Lubrication Protocol: Grease power end bearings and crosshead components with high-temperature drilling-grade lubricant every 400 hours, ensuring proper lubrication to reduce friction and wear.
We supply the following spare parts:
| No | Item | Unit |
| 2 | GASKET PINION 7502-0591-00 PUMP EMSCO | PC |
| 3 | BEARING GAS-102417-000 PUMP GASO | PC |
| 4 | GASKET BEARING COVER PLATE 25C1084 GD | PC |
| 5 | GASKET, BEARING COVER PLATE 25C937 | EA |
| 6 | GASKET HOOD 2009457 GARDNER DENVER | PC |
| 7 | HOUSING AND END PLATE GASKET 25C1085 | EA |
| 8 | GASKET, HOUSING & RETAINING PLATE 25C973 | EA |
| 9 | GASKET,LEAD LINER SET;GAS-102465-000 | EA |
| 10 | GASKET O-RING 110-000276-201 PUMP GASO | PC |
| 11 | O-RING, GASKET 110-000359-202 GASO | EA |
| 12 | GASKET SUCTION MANIFOLD 25C320N GD | PC |
| 13 | O-RING, FE 1753 110-000376-200 GASO | EA |
| 14 | GLAND NUT GAS-100441-000 | M |
| 15 | PACKING WHITE ASBESTOS:5/8IN | M |
| 16 | GLAND STUFFING BOX 200FXN008 GD | PC |
| 17 | GLAND CRANKCASE GAS-102266-000 PUMP GASO | PC |
| 18 | GUARD, SUCTION GAS-102125-000 PUMP GASO | PC |
| 19 | HALF RING GAS-102594-000 PUMP GASO | PC |
| 20 | HEAD CYLINDER 200FXN007 GARDNER DENVER | PC |
| 21 | HOUSING BEARING 200FXN006 GARDNER DENVER | PC |
| 22 | PISTON RUBBER;6-1/2IN;B SERIES;TBB76017 | SET |
| 23 | RUBBER PISTON;4IN;SERI K;TBK90403 | SET |
| 24 | RUBBER PISTON;4IN;SERI K;TBK90423 | SET |
| 25 | INSERT VALVE;1FG452 | PC |
| 26 | INSERT VALVE;201PZL106 | EA |
| 27 | INSERT VALVE 202PZL106 GARDNER DENVER | PC |
| 28 | INSERT VALVE GAS-100952-000 | EA |
| 29 | INSERT VALVE;DD6AB | EA |
| 30 | JACKSHAFT 200FXN371 GARDNER DENVER | PC |
| 31 | ECCENTRIC KEY;GARDNER DENVER;35C68 | EA |
| 32 | KEY JACKSHAFT;GARDNER DENVER;35B167 | EA |
| 33 | JACKSHAFT KEY 35B99 GARDNER DENVER | PC |
| 34 | SPACER RING, GAS-102625-A01 PUMP GASO | PC |
| 35 | LANTERN RING, 001-004947-302 GASO OR EQ | EA |
| 36 | LANTERN RING GAS-102624-000 | EA |
| 37 | LINNER PISTON 6-1/2;203FXN456 | EA |
| 38 | LINER, 7 IN 202FXN456 GARDEN DENVER | EA |
| 39 | LINER 6 1/2 IN GAS-100916-B25 PUMP GASO | PC |
| 40 | SEAL COVER VALVE 4IN 110-000363-200 | EA |
| 41 | BAFFLE DISC, 001-007986-201 GASO OR EQ | EA |
| 42 | PISTON ROD BAFFLE 1FXX840 GARDNER DENVER | PC |
| 43 | BEARING CON ROD GAS-102601-000 PUMP GASO | PC |
| 44 | BEARING GAS-100396-000 GASO PUMP | PC |
| 45 | CAP SCREW 100-058112-273 GASO PUMP | PC |
| 46 | CAP SCREW 100-012234-273 PUMP GASO | PC |
| 47 | CAP SCREW GAS-104697-000 PUMP GASO | PC |
| 48 | CAP SCREW GAS-104509-000 PUMP GASO | PC |
| 49 | CLAMP LINER;GARDNER DENVER;FD217 | EA |
| 50 | BEARING GAS-100438-000 PUMP GASO | PC |
| 51 | COVER VALVE GN147 GARDNER DENVER | PC |
| 52 | CROSS HEAD EXTENSION ROD GAS-100443-000 | EA |
| 53 | CROSSHEAD ASSY 201FXN005A GARDNER DENVER | PC |
| 54 | CROSSHEAD GUIDE 6397-0606-00 PUMP EMSCO | PC |
| 55 | BAFFLE 2FXK840 GARDNER DENVER | PC |
| 56 | PIN ROLLER BEARING 6397-0633-00 EMSCO | PC |
| 57 | BREATHER AAB-13766-000 PUMP GASO | PC |
| 58 | CYLINDER LINER;FD45640 | PC |
| 59 | BUSHING 001-007953-306 PUMP GASO | PC |
| 60 | CYLINDER LINER FZ6265BB GARDNER DENVER | PC |
| 61 | BUSHING CON ROD GAS-102604-000 PUMP GASO | PC |
| 62 | CYL LINER 6-1/4 IN 7602-136040 EMSCO | PC |
| 63 | BUSHING CROSSHEAD END FXX229 GD | PC |
| 64 | BUSHING GLAND;1FD152 | PC |
| 65 | DISC, 001-021142-263 GASO OR EQ | EA |
| 66 | BUSHING ECCENTRIC END 2FXX421 GD | PC |
| 67 | BUSHING CROSSHEAD END;FXD229 | EA |
| 68 | ELBOW PIPE OIL LEVEL 64D4 GARDNER DENVER | PC |
| 69 | BUSHING ECCENTRIC END FXD421 | EA |
| 70 | PISTON RUBBER 6-1/2 GAS-105350-000 GASO | PC |
| 71 | END BEARING 120-256053-999 GASO PUMP | PC |
| 72 | CAP SCREW 100-038012-290 GASO PUMP | PC |
| 73 | RUBBER PISTON;7IN;TBB76019 | SET |
| 74 | FITTING, LUBRICATION 40E5 | EA |
| 75 | SPACER, LANTERN 200FXN445 GARDEN DENVER | EA |
| 76 | SCREW, 1 IN LG 655EE04D PUMP GD FXX | EA |
| 77 | BLIND FLANGE 64EB152 GARDNER DENVER | PC |
| 78 | SPACER LANTERN GN957; GARDNER DENVER | PC |
| 79 | SPACER RING, GAS-102625-A01 PUMP GASO | PC |
| 80 | SPACER BEARING FXD376 GARDNER DENVER | PC |
| 81 | SPACER BEARING FXX376 GARDNER DENVER | PC |
| 82 | SPACER LINER SLEEVE EN957 GARDNER DENVER | PC |
| 83 | LINER SLEEVE SPACER;FC957 | EA |
| 84 | SPACER, PINION BEARING GAS-102421-000 | PC |
| 85 | SPRING VALVE;GARDNER DENVER;78H44 | EA |
| 86 | SPRING VALVE 4IN GAS-100949-B34 | EA |
| 87 | SPRING VALVE;78A171 | EA |
| 88 | SPRING, SUCTION GAS-102575-000 PUMP GASO | PC |
| 89 | SPRING VALVE, 001-021144-362. GASO OR EQ | EA |
| 90 | SEAL, WG SUCT. DISCH. GAS-102573-000 | EA |
| 91 | STUD 104-038100-286 PUMP GASO | PC |
| 92 | STUD, 201FXN110 GARDNER DENVER | PC |
| 93 | STUD, 208PZL110 GARDNER DENVER | PC |
| 94 | STUD 79A66 GARDNER DENVER | PC |
| 95 | STUD 79L161 GARDNER DENVER | PC |
| 96 | STUD 79L63 GARDNER DENVER | PC |
| 97 | SCREW 1-1/2 IN LG 655EF06D PUMP GD FXD | EA |
| 98 | GASKET 25V19 GARDNER DENVER | PC |
| 99 | SPACER SHIM SET 6397-0716-00 EMSCO | PC |
| 100 | SCREW:1-1/4IN LG;RETAINER PLATE;655EF05D | EA |
| 101 | STUFFING BOX 6397-0355-01 PUMP EMSCO | PC |
| 102 | THROAT BUSHING 001-003819-302 GASO OR EQ | SET |
| 103 | SCREW BEARING COVER PLATE 655EF050 GD | PC |
| 104 | GASKET 001-007966-204 PUMP GASO | PC |
| 105 | SCREW HOOD 75AA1 GARDNER DENVER | PC |
| 106 | GASKET 25C2619 GARDNER DENVER | PC |
| 107 | SCREW HOUSING PN 655EF080 GARDNER DENVER | PC |
| 108 | SCREW HOUSING 655EF979 GARDNER DENVER | PC |
| 109 | GASKET, 204-000104-206 GASO OR EQ | EA |
| 110 | SCREW SHAFT EXTENTION COVER 655EE030 GD | PC |
| 111 | GASKET CYL HEAD 25BE8 GARDNER DENVER | PC |
| 112 | SCREW SHAFT EXTENTION COVER 75A68 GD | PC |
| 113 | GASKET CYLINDER HEAD;25T40 | PC |
| 114 | SCREW VALVE FLUID 5FF156 GARDNER DENVER | PC |
| 115 | GASKET LINER GAS-102544-000 PUMP GASO | PC |
| 116 | SEAL LINER 6-1/2 IN GAS-102213 PUMP GASO | PC |
| 117 | SEAL OIL 60DD64 GARDNER DENVER | PC |
| 118 | GASKET HYD 200FXN200A GARDNER DENVER | PC |
| 119 | SEAL OIL;GARDNER DENVER;60G17 | EA |
| 120 | GASKET HYD;GARDNER DENVER;200FXN715 | EA |
| 121 | SEAL, OIL 60G7 | EA |
| 122 | GASKET HYDRAULIC 25AL1 GARDNER DENVER | PC |
| 123 | SEAL OIL BEARING HOUSING 60G3 PUMP GD | EA |
| 124 | SEAL OIL BEARING 60G221 GARDNER DENVER | PC |
| 125 | GASKET VALVE COVER;25G32 | EA |
| 126 | SEAT VALVE, 11FG39 | EA |
| 127 | V-BELT;4 LAYER;8V3750 | EA |
| 128 | SEAT VALVE, 202PZL039 GARDNER DENVER | EA |
| 129 | V-BELT;4 LAYER;8V3750 | EA |
| 130 | SEAT VALVE 7EN39 GARDNER DENVER | PC |
| 131 | V-BELT;4 LAYER;8V3750 | EA |
| 132 | SEATING VALVE 001-021146-261 PUMP GASO | PC |
| 133 | V-BELT 5P2800 | EA |
| 134 | SEATTING VALVE GAS-100957-000 | EA |
| 135 | WASHER VALVE;GARDNER DENVER;201PZL279 | EA |
| 136 | SET SCREW CYL GAS-102463-000 PUMP GASO | PC |
| 137 | RING, GASKET HYDRAULIC 25AT37 GD | EA |
| 138 | SEAL, OIL BEARING HOUSING 60G5 | EA |
| 139 | GASKET STUFFING BOX;25C1737 | PC |
| 140 | SEAL, OIL BEARING RETAING PLATE 60G19 | EA |
| 141 | GASKET VALVE COVER;25AL62 | PC |
| 142 | STUD, CYLINDER HEAD 79L80 GARDEN DENVER | EA |
| 143 | STUD, 102-012218-263 GASO OR EQ | EA |
| 144 | STUD 102-038134-271 PUMP GASO | PC |
| 145 | STUD,OIL STOP HEAD 79A69 | EA |
| 146 | STUD VALVE COVER 79L4 GARDNER DENVER | PC |
| 147 | STUD, CYLINDER HEAD 79L80 GARDEN DENVER | EA |
| 148 | STUD CYL TO FRAME 79A557 GARDNER DENVER | PC |
| 149 | STUD, CYL TO FRAME 79L92 GARDNER DENVER | PC |
| 150 | STUD,OIL STOP HEAD 79A69 | EA |
| 151 | STUFFING BOX GAS-102731-000 | EA |
| 152 | STUFFING BOX ASSY;2007956 | PC |
| 153 | STUFFING BOX BUSHING 6397-0012-00 EMSCO | PC |
| 154 | STUFFING BOX GASKET 7602-160030 | EA |
| 155 | THROAT BUSHING 001-003819-302 GASO OR EQ | SET |
| 156 | V BELT C-270 | EA |
| 157 | VALVE ASSY 202PZL482A GARDNER DENVER | PC |
| 158 | VALVE ASSY, 7602-292037 GARDNER DENVER | EA |
| 159 | VALVE ASSY DD7B GARDNER DENVER | PC |
| 160 | VALVE ASSY GAS-100956-000 | EA |
| 161 | WASHER LINER CLAMP SET SCREW 95F12 GD | PC |
| 162 | CLAMP SET SCREW 1FY207 GARDNER DENVER | PC |
| 163 | WASHER VALVE FLUID 95D49 GARDNER DENVER | PC |
| 164 | SHELL BEARING 002-001292-999 PUMP GASO | PC |
| 165 | WIRE 48 IN 97A29 GARDNER DENVER | PC |
| 166 | SPACER SHIM 001-007959-999 PUMP GASO | PC |
| 167 | WRIST PIN 001-007954-220 PUMP GASO | PC |
| 168 | GASKET KIT SHIM 998-016300-037 PUMP GASO | PC |
| 169 | WRIST PIN BEARING 121-433078-999 | EA |
| 170 | BEARING SHIM GAS-102464-000 PUMP GASO | PC |
| 171 | BEARING, SHIM COVER PLATE 77B20 | EA |
| 172 | BEARING COVER PLATE SHIM 77B22 GD | PC |
| 173 | BEARING SHIMSET GAS-102432-000 PUMP GASO | PC |
| 174 | CROSSHEAD SHOE 200FXN027 GARDNER DENVER | PC |
| 175 | SLEEVE, 001-021145-263 GASO OR EQ | EA |
| 176 | SLEEVE LINER 3EN519 GARDNER DENVER | PC |
| 177 | SLEEVE LINER;4EF519;GARDNER DENVER | PC |
| 178 | SLEEVE WEAR 80M11 GARDNER DENVER | PC |
| 179 | SLEEVE, SUCTION GAS-102206-000 PUMP GASO | PC |
| 180 | SLEEVE SHAFT 20AUX18 GARDNER DENVER | PC |
| 181 | SLEEVE SHAFT FXD289 GARDNER DENVER | PC |
| 182 | SLEEVE SHAFT FXX289 GARDNER DENVER | PC |
| 183 | VALVE BUMPER 6397-0148-00 PUMP EMSCO | PC |
| 184 | VALVE FLUID, 17FG206 GASO OR EQ | EA |
| 185 | VALVE FLUID 2EN206 GARDNER DENVER | PC |
| 186 | VALVE GUIDE PUMP 6397-0602-00 EMSCO D225 | EA |
| 187 | RETAINER VALVE GUIDE 6397-0603-00 EMSCO | PC |
| 188 | VALVE SEAT, 7602-231007 GARDNER DENVER | EA |
| 189 | SUCTION VALVE GAS-102571-000 PUMP GASO | PC |
7. Field Failure Repair Cases
Case 1: Mud Pump Valve Failure
Scenario: An EMSCO mud pump experienced pressure loss and backflow due to worn valve inserts (1FG452) and broken valve springs, halting mud circulation.
Solution: Replacement of worn valve inserts, valve seats, and valve springs restored proper valve sealing and flow control.
Outcome: Pump pressure stabilized, and mud circulation resumed without leaks or backflow.
Case 2: Jackshaft Bearing Burnout
Scenario: Excessive noise and shaft binding occurred due to failed 12BA70 jackshaft bearings on a Gardner Denver mud pump, stopping pump operation.
Solution: Installation of new OEM-grade bearings and replacement of bearing cover gaskets resolved friction and binding issues.
Outcome: Shaft rotation smoothed immediately, reducing downtime and preventing further power end damage.
Case 3: Piston & Liner Wear
Scenario: A GASO mud pump lost pumping efficiency due to worn 6-1/2in rubber pistons and scuffed cylinder liners, reducing mud flow rate.
Solution: Replacement of worn pistons and damaged liners restored proper fluid end sealing and pressure.
Outcome: Mud flow rate returned to full capacity, maintaining drilling efficiency.
8. Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts compatible with all EMSCO, Gardner Denver, and GASO mud pumps? | These parts are designed for standard EMSCO, Gardner Denver FX/FXN series, and GASO series mud pumps; verify your pump’s OEM part number to ensure exact fitment. |
| How do I select the correct piston size for my mud pump? | Match the piston diameter (4in, 6-1/2in, 7in) and series designation (B Series, K Series) to your pump’s cylinder liner specifications listed in the part description. |
| Do these parts meet API drilling pump standards? | Yes, all pressure-containing and load-bearing parts comply with API 7K and API 674, the global industry standards for drilling mud pumps and well servicing equipment. |
9. Procurement Guidance & Call to Action
For operators maintaining EMSCO, Gardner Denver, and GASO mud pumps, these OEM-compatible spare parts serve as both a rigorous procurement benchmark and a definitive technical solution for resolving valve, bearing, piston, liner, and seal failures. Each component is vetted for quality, pressure rating, and API compliance to keep your mud pump operating safely, efficiently, and with minimal unplanned downtime, ensuring full adherence to global drilling safety and equipment maintenance regulations.
