1. Product Description
This comprehensive parts catalog features fully interchangeable components for Pacemaker Triplex Plunger Pumps, optimized for 3.5” and 4.5” plunger packing configurations. Every part is manufactured to strict ISO 9001 quality standards, using high-grade materials: hardmetal-coated plungers for abrasion resistance, 90-durometer nitrile O-rings for chemical compatibility, forged steel hardware for load-bearing strength, and Chevron-style gland packs for high-pressure sealing. Unlike generic aftermarket parts, these components match OEM dimensional tolerances (±0.001” precision) to eliminate fit gaps and assembly errors.
2. Core Functional Description
These replacement parts perform critical roles in maintaining pump integrity and operational efficiency: plunger packing sets prevent high-pressure fluid bypass and extend plunger service life; seal rings & backup rings contain lubrication and block external contamination;valve assemblies & seats ensure positive fluid displacement with minimal pulsation; power end gaskets & oil seals protect crankshaft and crosshead components; and connection hardware maintains pressure integrity in low/high-pressure lines. Each component is designed for tool-free field installation and direct drop-in replacement, minimizing repair downtime.
3. Structural & Material Highlights
- Plunger Components: Hardmetal-coated 3.5”/4.5” plungers with polished surface finish (Ra ≤ 0.8 μm) to reduce seal friction and wear; precision-machined plunger rods and caps for perfect concentricity.
- Sealing Systems: Multi-stage Chevron packing sets, high-performance backup rings (TFLN material), and AS568-standard O-rings (90 durometer nitrile) for temperature resistance (-40°F to 250°F) and pressure retention.
- Fluid End Parts: Forged steel valve guides, heat-treated valve springs, and corrosion-resistant valve seats for abrasive fluid service (mud, crude oil, fracturing fluids).
- Power End Parts: Heavy-duty crosshead seal covers, oil pan gaskets, and output shaft seals (Garlock-grade) to prevent oil contamination and leakage in the 114501 power end assembly.
- Hardware & Connections: Grade 8 hex nuts, star lock washers, and brass pneumatic fittings for consistent torque retention and corrosion resistance.
4. Applicable Operating Conditions
These parts are validated for extreme wellsite and industrial scenarios, including:
- High-pressure fluid pumping (up to 15,000 PSI) for oil drilling, hydraulic fracturing, and well servicing
- Abrasive and corrosive fluid handling (mud, brine, crude oil, acidic treatment fluids)
- Continuous-duty operation (450 RPM max crank speed) in remote oilfield and industrial sites
- Low-pressure pneumatic/fluid line systems and surge tank weight monitoring setups
- 2” 1502 high-pressure pump-out connections for heavy-duty fluid transfer
5. Proactive Maintenance & Troubleshooting Recommendations
To maximize component lifespan and prevent costly failures, follow these field-proven maintenance guidelines:
- Inspect plunger packing, O-rings, and seal rings every 500 operating hours; replace worn components immediately to stop leakage.
- Lubricate power end components with ISO-grade 46 hydraulic oil every 1,000 hours, and replace oil seals at the first sign of seepage.
- Check valve assemblies and seats for wear, chipping, or mushrooming every 750 hours; clean or replace parts to restore flow efficiency.
- Torque all hardware (hex nuts, studs, lock washers) to OEM specifications (120–150 ft-lbs for 3/4” NC fasteners) to prevent loosening during vibration.
- Store spare parts in a dry, dust-free environment to preserve sealing integrity and material performance.
- We supply the following spare parts:
| 122 | PMP,GLAND PKG 4.5″ CHEVRON | 129510 | |
| 123 | PMP,PLUNGER 4.5″ HARDMETAL COATED | 112882 | |
| 124 | PMP,PLUNGER ROD 3.5-5.0″ F/E | 112528 | |
| 125 | PMP,PLUNGER CAP 4.50″ | 112527 | |
| 126 | COVER ASSY. CROSS HEAD SEAL | 112588 | |
| 127 | PMP,RING SEAL 4.5 SLC CS | 120420 | |
| 128 | SPACER RING, 4,5″ PMP | 13654105 | |
| 129 | PMP,RING BACK 4.5″ SLC | 120298 | |
| 130 | GASKET, COVER CROSSHEAD SEAL | 112595 | |
| 131 | PMP,BKUP RING 6.250 X 5.915 TFLN | 120531-45 | |
| 132 | PMP,BKUP RING 5.500 X 5.283 TFLN | 120531-46 | |
| 133 | O-RING,AS568-343 NTRL 90 DURO | XAS 343 03 | |
| 134 | O-RING,AS568-360 NTRL 90 DURO | XAS 360 02 | |
| 135 | O-RING,AS568-252 NTRL 90 DURO | XAS 252 02 | |
| 136 | WASHER,LOCK 3/4″ INT STAR | 939657-12 | |
| 137 | NUT,HEX 0.750-10NC S CAD G8″ | 939207-7 | |
| 138 | PLUG,PIPE SOC HD 0.250 NPT FS | 31564 | |
| 139 | ELBOW, 90 04MS-04FP BRASS | 118318 | |
| 140 | SEAL, ROD 4,5″ PRKR | 12949505 | |
| 141 | VALVE,CHECK ASSY W/CAP W/O FLTR&STRAINER | X304374 | |
| 142 | SEAL,OIL NATIONAL 416154 | 118461 | |
| 143 | SEAL, PRESS RG 4,5″ (HARD) | 13654905 | |
| 144 | HEADER RING, 4,5 X 5,5″ P | 13654805 | |
| 145 | SEAL, PRES RNG 4,5 X 5,5″ (SOFT) | 13655005 | |
| 146 | PMP,GLAND PKG 3.5″ CHEVRON | 129508 | |
| 147 | PMP,PLUNGER 3.5″ HARDMETAL COATED | 118178 | |
| 148 | COVER ASSY. CROSS HEAD SEAL | 120002 | |
| 149 | PMP,SUCTION COVER CASTING | 112505-1 | Worn out, leaking from threads |
| 150 | PMP,DISCHARGE COVER STANDARD | 112519 | Worn out, head mushroomed |
| 151 | PMP,SEAL RING 3.5″ SFE F/PUMP | 128692 | |
| 152 | RING, SPACER 3.50″ PL PKG | 13654103 | |
| 153 | PMP,RING BACK 3.5″ SLC PACK | 120251 | |
| 154 | GASKET, COVER CROSSHEAD SEAL | 112595 | |
| 155 | PMP,BKUP RING 5.688 X 5.353 TFLN | 120531-55 | |
| 156 | PMP,BKUP RING 5.500 X 5.283 TFLN | 120531-46 | |
| 157 | O-RING,AS568-356 NTRL 90 DURO | XAS 356 02 | |
| 158 | O-RING,AS568-252 NTRL 90 DURO | XAS 252 02 | |
| 159 | WASHER,LOCK 3/4″ INT STAR | 939657-12 | |
| 160 | STUD,0.750NC X 4.00 | 118376 | |
| 161 | NUT,HEX 0.750-10NC S CAD G8″ | 939207-7 | |
| 162 | PLUG,PIPE SOC HD 0.250 NPT FS | 31564 | |
| 163 | SEAL,ROD 3.50 PRKR 25003500-37″ | 12949503 | |
| 164 | SEAL,OIL NATIONAL 415437 | 118469 | |
| 165 | SEAL,PRES RG 3.50 X 4.50 3KPSI (HARD) | 13654903 | |
| 166 | RING,HEADER 3.500 X 4.500 PL P | 13654803 | |
| 167 | PACKING ASSY,PLUNGER PMP 3.50 UTEX (SOFT) | 43044 | |
| 168 | RING, BACK UP 8-226 PARKER PARBAK | 21740 | |
| 169 | O-RING, 568-226-02 P/BJ SPEC 128119 | XAS-226-02 | |
| 170 | VALVE ASSY,DISCH PACEMAKER PMP | 36627BJ | |
| 171 | PMP,DISCHARGE VALVE SEAT MISSION | 40496 | |
| 172 | PMP,DISCHARGE VALVE HF-4-V1 | 40497 | |
| 173 | PMP,SPRING DISCH VALVE 300SRS YELLOW | 112818 | |
| 174 | O-RING,AS568-240 NTRL 70 DURO | XAS 240 01 | |
| 175 | PMP,INSERT VALVE DISCH HF-4-I RED Acid | 36629BJ | |
| 176 | PMP,SUCTION VLV ASSY FOR CMT 60# SPRING | 36585BJ-1 | |
| 177 | PMP,SUCTION VLV W/INSERT HF-5- | 40111 | |
| 178 | PMP,SUCTION VLV SEAT HF-5-S4 W/R | 40110 | |
| 179 | PMP,GUIDE SUCT VALVE CSS SFE 350 SRS | 120145 | |
| 180 | PMP,VALVE STEM GUIDE ASSY 300/375 SERIES | 115376 | |
| 181 | PMP,SPRING SUCTION VALVE | 112856 | |
| 182 | PMP,RETAINER SPRING SUCT VALVE | 115823 | |
| 183 | NUT,HEX LOCK 0.500-20NF S CLF1 220GRA | 118499 | |
| 184 | GASKET | 118410 | |
| 185 | GASKET, OIL PAN | 112854 | |
| 186 | SEAL,OIL GARLOCK 53 x 2798 OUT PUT SHAFT | 118331 | |
| 187 | QUAD RING | 118339 | |
| 188 | SEAL OIL | 118451 | |
| 189 | CROSS HEAD GASKET | 112595 | |
| 190 | SEAL OIL | 118459 | |
| 191 | HEAD, FILTER HYD DONALDSON, For Filter P165659 | 862487 | |
| 192 | Pneumatic actuator, Grinell #GDA-20-CNI (6” thru 8” valve) | 64202 | |
| 193 | 2″ Ball Valves, Jamesburry | X-8667 | |
| 194 | Load Cell, 8.5 10,000 lbs (Surge Tank) | MD Totco NOV Martin Decker | |
| 195 | SWVL ASSY/STL 50 FXM/INT/2 LR/PCMKR | 1128012 |
Field-Proven Troubleshooting & Repair Case Studies
Case 1: Thread Leakage on Suction Cover (3.5” Plunger Pump)
A remote wellsite reported persistent fluid leakage from the 112505-1 suction cover casting. Inspection revealed worn threads and degraded sealing surfaces. Replacing the suction cover with our OEM-compatible casting and re-sealing with 112595 crosshead gaskets eliminated leakage within 45 minutes, restoring full suction pressure and preventing unplanned well shutdown.
Case 2: Discharge Cover Mushrooming & Pressure Loss
A fracturing pump experienced severe pressure drop and abnormal noise, traced to a mushroomed 112519 discharge cover. Installing our precision-forged replacement discharge cover and paired valve seat assembly restored 100% pressure retention, reduced vibration, and extended the pump’s mean time between failures (MTBF) by 30%.
Case 3: Premature Plunger Seal Failure (4.5” Plunger Pump)
A workover pump required frequent seal replacements due to rapid wear on standard packing sets. Upgrading to our 129510 Chevron gland package and hardmetal-coated 112882 plunger reduced seal wear by 60%, extending maintenance intervals from 2 weeks to 2 months and cutting replacement labor costs significantly.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts fully compatible with standard Pacemaker Triplex Pumps (3.5” & 4.5” plunger)? | Yes, all parts are engineered to OEM dimensional and performance standards, ensuring direct drop-in compatibility with Pacemaker pumps equipped with 3.5” and 4.5” plunger packing assemblies, including the 114501 power end. |
| What materials are used for high-pressure sealing components? | Sealing parts use 90-durometer nitrile (NTRL) O-rings, TFLN backup rings, Chevron-style fabric-reinforced packing, and hard/soft pressure rings to handle 15,000 PSI pressure and corrosive well fluids. |
| How do I select the correct part for my pump’s worn component? | Match the OEM part number (printed on your existing component) to our listed part numbers; cross-reference plunger size (3.5”/4.5”) and assembly type (fluid end/power end) for perfect fit and performance. |
Strategic Procurement Guidance
Optimize your pump uptime and operational efficiency by securing these high-quality Pacemaker plunger pump parts for routine inventory stocking, emergency repair campaigns, and full pump overhauls. Each component is manufactured to rigorous industrial standards, delivering unmatched durability, sealing performance, and cost-effectiveness for heavy-duty pumping operations. Whether you need replacement plungers, sealing kits, valve assemblies, or power end hardware, this parts lineup provides a reliable, OEM-compatible solution to resolve technical failures, maintain system pressure integrity, and keep your pumping equipment operating at peak performance. Reach out to secure your customized parts order and build a resilient maintenance supply chain.
