1. Detailed Product Introduction
This comprehensive WS-1300T parts collection covers all critical assemblies: pinion assembly, crankshaft assembly, crosshead assembly, stripper box assembly, fluid end assembly, fluid module assembly, desurger assembly, strainer cross assembly, and pulsation dampener assembly. Included components range from heavy structural parts (crankshaft, pinion shaft, fluid end module) to wearable parts (bearings, seals, valves, pistons), fasteners, gaskets, and specialized fittings—all engineered as direct OEM equivalents for seamless compatibility.
2. Key Functional Specifications
Every WS-1300T part delivers targeted, field-proven functionality to keep the triplex mud pump running reliably: Power end components (pinion, crankshaft, connecting rod) handle high-torque power transmission and convert rotary motion to reciprocating motion; crosshead & stripper box parts maintain linear alignment and seal out abrasive drilling mud; fluid end components manage 5000 PSI high-pressure mud discharge and suction; auxiliary parts (desurger, strainer, pulsation dampener) stabilize fluid flow, filter solids, and reduce pressure pulsation. All parts are rated for continuous operation up to 150 strokes per minute (SPM) and operating temperatures from -20°F to 380°F, withstanding heavy cycling and abrasive mud conditions without premature failure.
3. Structural & Material Advantages
These WS-1300T spare parts feature optimized structural design and industrial-grade materials to outperform generic aftermarket alternatives. Heavy-duty rotating components use single-piece forged alloy steel with precision heat treatment, reaching HRC 55-65 surface hardness for exceptional fatigue and wear resistance; bearing components use heavy-duty rolling-element designs for high radial load capacity; fluid end valves & seats use precision-lapped sealing surfaces for zero-leakage performance; sealing elements use oil- and abrasion-resistant rubber compounds for long-lasting dynamic and static sealing; all fasteners resist vibration loosening and shear failure under extreme operational stress. Exact OEM dimensional matching ensures perfect alignment, minimal assembly stress, and consistent performance across the entire pump system.
4. Recommended Applicable Operating Conditions
This full WS-1300T parts lineup is built for use across the harshest drilling environments: onshore oil & gas exploration, horizontal directional drilling (HDD), deep water well drilling, mining drilling, geological core drilling, and shale gas drilling. The parts perform reliably under demanding conditions: continuous high-pressure pumping up to 5000 PSI, high-solid-content abrasive drilling mud, frequent pump start-stop cycling, extreme ambient temperature swings, dusty remote rig sites, and long-duration uninterrupted drilling projects. They are suitable for full pump rebuilds, partial assembly repairs, and routine wearable part replacement.
5. Proactive Maintenance & Service Recommendations
To maximize pump uptime and part service life, follow these field-proven maintenance protocols: Inspect power end bearings, gears, and fasteners every 250 operating hours for wear, looseness, or abnormal noise; check fluid end valves, seats, and seals for leakage every 200 operating hours; replace wearable components (seals, pistons, valve inserts) on a scheduled basis before failure occurs; torque all fasteners to OEM specifications using calibrated tools; flush and change pump gear oil every 450 operating hours to remove abrasive particles; clean strainer and desurger components regularly to prevent flow restriction; store unused parts in a dry, corrosion-free environment; always cross-reference OEM part numbers before installation to avoid compatibility issues. Adhering to these steps drastically reduces unplanned downtime and long-term maintenance costs.
We supply the following spare parts:
| PINION ASSEMBLY PARTS LIST | |||
| ITEM | PART NO. | WT. | DESCRIPTION |
| NO. | EA | ||
| 1 | 723-1 | 2311 | PINION SHAFT |
| 2 | 202-2192 | 106 | PINION BEARING |
| 3 | 726-1-5 | 23.5 | PINION OIL SEAL RACE |
| 4 | 726-1-K | 7 | KEY 2” X 1” X 11” LONG |
| 5 | 726-001-02 | 270 | PINION BEARING HOUSING |
| 6 | 726-001-01 | 33 | PINION BEARING RETAINER |
| 7 | 726-1-1-HB | HEX HEAD BOLT | |
| 8 | 726-1-2-HB | HEX HEAD BOLT W/LOCK WASHER | |
| 9 | 726-1-2-G | PINION GASKET | |
| 10 | 726-1-2-SL | PINION OIL SEAL | |
| 11 | 726-1-8 | PINION SEAL RETAINING RING | |
| 12 | 726-1-8-HB | HEX BOLT | |
| 13 | 726-1-9 | 10.7 | PINION SHAFT COVER |
| 14 | 726-1-9-1 | END SWING PLATE (c/w pinion shaft cover) | |
| 15 | 726-1-9-1-HB | HEX BOLT W/NUT | |
| CRANKSHAFT ASSEMBLY PARTS LIST | |||
| ITEM | PART NO. | WT. | DESCRIPTION |
| NO. | EA | ||
| 1 | 726-003 | 5522 | CRANKSHAFT |
| 2 | 723-2 | 1707 | BULL GEAR |
| 3 | 726-2-HB | HEX BOLT | |
| 4 | 723-4 | 1309 | CONNECTING ROD |
| 5 | 726-3-27 | 88 | INTERNAL RETAINING RING |
| 6 | 723-3-25 | 74.8 | EXTERNAL RETAINING RING |
| 7 | 726-3-28 | 11 | SPACER |
| 8 | 723-3-23 | 237.6 | FIXED BEARING CARRIAGE |
| 9 | 723-3-21 | 48.4 | FIXED BEARING RETAINING RING |
| 10 | 726-3-20 | 19.8 | RETAINER PLATE |
| 11 | 723-3-24 | 231 | FLOATING BEARING CARRIAGE |
| 12 | 723-3-26 | 55 | FLOATING BEARING RETAINING RING |
| 13 | 201-2202 | 384 | MAIN BEARING |
| 14 | 202-2181 | 411 | ECCENTRIC BEARING |
| 15 | 726-3-20-HB | HEX HEAD BOLT W/LCK WASHER | |
| 16 | 726-3-27-HB | HEX HEAD BOLT W/LOCK WASHER | |
| 17 | 726-3-23-HB | HEX HEAD BOLT W/LOCK WASHER | |
| 18 | 726-2-HN | HEAD BOLT, C/W LOCK WASHER | |
| 19 | 1/16” DIA, WIRE (LENGTH AS REQUIRED) | ||
| CROSSHEAD ASSEMBLY PARTS LIST | |||
| ITEM | PART NO. | WT. EA | DESCRIPTION |
| 1 | 726-006 | 578.6 | CROSSHEAD |
| 2 | 726-6-1-1 | 154 | CROSSHEAD TOP GUIDE |
| 3 | 726-6-1-2 | 154 | CROSSHEAD BOTTOM GUIDE |
| 4 | 726-004-01 | 169.4 | WRIST PIN |
| 5 | 726-6-9 | 39.6 | WRIST PIN RETAINER PLATE |
| 6 | 726-6-2 | 15 | STRIPPER BOX SUPPORT PLATE |
| 7 | 726-6-4-000 | 44 | STRIPPER BOX ASSEMBLY |
| 8 | 726-6-7 | 140.8 | EXTENSION ROD |
| 9 | 726-6-10 | 48.4 | ROD CLAMP |
| 10 | 726-6-8 | 41.8 | PISTON ROD |
| 11 | 726-6-8-X* | 10 | PISTON |
| 12 | 726-6-8-1-1 | 1 | PISTON LOCKING NUT |
| 13 | 202-2195 | 99.4 | BEARING |
| 14 | 726-6-9-HB | HEX BOLT C/W LOCK WASHER | |
| 15 | 726-4-1-HB | HEX BOLT C/W LOCK WASHER | |
| 16 | 726-6-7-HB | HEX BOLT | |
| 17 | 726-6-11-SB | SOCKET BOLT | |
| 18 | 726-6-11 | 3.3 | TAP PAD |
| 19 | 720-6-3-HB | HEX BOLT C/W WASHER | |
| 20 | 720-6-4-G | STRIPPER BOX GASKET | |
| 21 | 720-6-2-G | STRIPPER BOX SUPPORT PLATE GASKET | |
| STRIPPER BOX ASSEMBLY PARTS LIST | |||
| ITEM | PART NO. | WT. EA | DESCRIPTION |
| 1 | 726-6-4 | 44 | STRIPPER BOX |
| 2 | 726-6-6 | 1.5 | LANTERN RING |
| 3 | 726-6-5 | 2 | PACKING RETAINING RING |
| 4 | 726-6-4-SL | PACKING SEALS | |
| 5 | 726-6-5-HB | HEX BOLT | |
| 6 | 726-6-7-HB | HEX BOLT | |
| 7 | 726-6-3 | 20 | STRIPPER BOX RETAINING RING |
| FLUID END ASSEMBLY PARTS LIST | |||
| ITEM | PART NO. | WT. | DESCRIPTION |
| NO. | EA | ||
| 1 | 726-A-25-000 | 2650 | FLUID END MODULE ASSEMBLY |
| 2 | 726-F-001 | 198 | THREADED RING |
| 3 | 726-F-002 | 121 | THREADED PLUG RETAINER |
| 4 | 726-A-4 | 983 | DISCHARGE MANIFOLD |
| 5 | 726-A-7 | 167.2 | BLANK FLANG, 3”X5000 PSI |
| 6 | 726-A-2-000 | 855.8 | STRAINER CROSS ASSEMBLY |
| 7 | 726-A-11-000 | 2370 | PULSATION DAMPENER ASSEMBLY |
| 8 | 726-F-003 | 148.5 | THREADED LINER RETAINER |
| 9 | 726-F-2-X | LINER | |
| 10 | 726-004-1 | LINER SEAL | |
| 11 | 726-A-4-SL | DISCHARGE SEAL | |
| 12 | 726-A-1 | 738 | SUCTION MANIFOLD |
| FLUID MODULE ASSEMBLY PARTS LIST | |||
| ITEM | PART NO. | WT. EA | DESCRIPTION |
| NO. | |||
| 1 | 726-F-025 | 2235 | FLUID END MODULE |
| 2 | 726-F-004 | 44 | CYLINDER HEAD PLUG |
| 3 | 726-F-007 | 24.4 | TOP VALVE GUIDE |
| 4 | 726-F-72-2 | 0.5 | SPRING, API #7 |
| 5 | 726-F-72-FO | 29.7 | VALVE, API#7 |
| 6 | 726-F-73-FO | 24 | VALVE SEAT, API #7 |
| 7 | 726-F-006 | 6 | LOWER VALVE GUIDE |
| 8 | 726-F-005 | 7.7 | LOWER VALVE GUIDE RETAINER |
| 9 | 726-f-004-1 | 0.2 | PLUG SEAL |
| 10 | 726-F-72-1 | VALVE INSERT | |
| 11 | 726-F-2-ST | 5 | STUD, C/W HEX NUT, LOCK WASHER |
| 12 | 726-F-3-ST | 9.5 | STUD, C/W HEX NUT & LOCK WASHER |
| 13 | 726-A-4-ST | 11 | STUD, C/W HEX NUT & LOCK WASHER |
| 14 | 726-F-25-1 | STUD, C/W HEX NUT & LOCK WASHER | |
| DESURGER ASSEMBLY PARTS LIST | |||
| ITEM | PART NO. | WT. EA | DESCRIPTION |
| NO. | |||
| 1 | 726-A-1 | 708.4 | SUCTION MANIFOLD |
| 2 | 726-A-1-2 | 5 | DESURGE RUBBER |
| 3 | 726-A-1-1 | 10 | DESURGER RING |
| 4 | 726-A-1-HB | HEX HEAD BOLT, C/W HEX NUT & LOCK WASHER | |
| ITEM | PART NO. | WT. EA | DESCRIPTION |
| NO. | |||
| 1 | 726-A-1 | 708.4 | SUCTION MANIFOLD |
| 2 | 726-A-20 | 271 | DESURGER |
| 2a | 726-A-5 | 101.2 | BLANK FLANGE (ALTERNATIVE) |
| 3 | 726-A-1-HB | HEX HEAD BOLT, C/W HEX NUT & LOCK WASHER | |
| STRAINER CROSS ASSEMBLY PARTS LIST | |||
| ITEM | PART NO. | WT. EA | DESCRIPTION |
| NO. | |||
| 1 | 726-A-2 | 826 | STRAINER CROSS |
| 2 | 726-A-3 | 132 | STRAINER CROSS BULL PLUG FLANGE. 3”X5000 PSI |
| 3 | 726-A-13 | 9 | STRAINER (filter cylinder) |
| 4 | 726-A-2-SL | METAL RING GASKET, R44 | |
| 5 | 726-A-2-1-G | METAL RING GASKET, R39 | |
| 6 | 726-A-2-HN | 1 | HEX NUT, W/LOCK WASHER |
| 7 | 726-A-2-HB | 4 | STUD |
| PULSATION DAMPENER ASSEMBLY PARTS LIST | |||
| ITEM | PART NO. | WT. | DESCRIPTION |
| NO. | EA | ||
| 1 | 726-A-11-1 | 1936 | PULSATION DAMPENER BODY |
| 2 | 726-A-11-2 | 345.4 | PD TOP COVER |
| 3 | 726-A-11-3 | 74.8 | PD BOTTOM FLANGE |
| 4 | 726-A-11-4 | 20 | RUBBER BLADDER KIT |
| 5 | 726-A-11-2-1 | – | PD GAUGE PROTECTER |
| 6 | 726-A-11-G | PRESSURE GAUGE, 6000 PSI | |
| 7 | 726-A-11-V | 4 WAY VALVE | |
| 8 | 726-A-11-2-2 | VALVE NPT FITTING | |
| 9 | 726-A-11-2-SL | PD ADAPTER SEAL | |
| 10 | 726-A-11-3-SB | SOCKET HEAD BOLT | |
| 11 | 726-A-11-2-1-LE | LIFTING EYE | |
| 12 | 726-A-11-2-1-ST | STUD | |
| 13 | 726-A-11-2-ST | STUD, | |
| 14 | 726-A-11-2-HN | HEX NUT, C/W LOCK WASHER | |
| 15 | 726-A-11-3-HB | STUD, C/W HEX NUT & LOCK WASHER | |
| 16 | 726-A-11-2-HB | HEX HEAD BOLT, C/W NUT & LOCKWASHER |
6. On-Site Field Failure Repair Cases
Case 1: Fluid End Valve Failure Causing Pressure Loss
A land drilling rig running a WS-1300T pump suffered sudden discharge pressure loss and reduced mud flow, halting drilling. Inspection revealed worn API #7 valves and seats (726-F-72-FO, 726-F-73-FO) that failed to seal properly under pressure. Crews replaced the valve-seat sets, accompanying springs, and valve guides, restoring full pressure and resuming drilling in under 2 hours without full pump disassembly.
Case 2: Crosshead Bearing Wear Leading To Vibration
During a long HDD project, the WS-1300T pump developed severe power-end vibration and elevated operating temperatures. Testing showed premature wear on crosshead bearings (202-2195) due to contaminated lubrication. Maintenance teams replaced the bearings, realigned the crosshead assembly, and flushed the lubrication system, eliminating vibration and preventing further damage to crankshaft and connecting rod components.
Case 3: Seal Failure Causing Oil & Mud Leakage
A deep well drilling site reported persistent oil leakage from the pinion shaft and mud leakage from the stripper box. Inspections found failed pinion oil seals (726-1-2-SL) and worn stripper box packing seals. Replacing the damaged seals, gaskets, and retaining rings fully sealed both power end and fluid end sections, stopping leakage and avoiding costly lubricant loss and contamination.
7. Frequently Asked Questions (FAQ)
| Question | Answer |
| Are all these parts fully compatible with original White Star WS-1300T pumps? | Yes, every part is precision-machined to match OEM dimensions, weight, and performance specs, ensuring 100% direct drop-in compatibility with White Star WS-1300T triplex mud pumps with no modification needed. |
| What is the typical service life for wearable parts like seals and valves? | In standard drilling conditions, valves & seats last 300-400 operating hours; oil seals and packing seals last 600-800 operating hours. In high-abrasion environments, service life is shorter, and scheduled replacement is recommended. |
| Can I purchase individual parts instead of full assembly sets? | Absolutely. This catalog lists every part individually with unique OEM part numbers, so you can order exact replacement components for targeted repairs, full overhauls, or inventory stocking as needed. |
8. Procurement Guidance
For drilling operators, maintenance teams, and equipment suppliers seeking reliable, API-compliant OEM-grade spare parts for White Star WS-1300T triplex mud pumps, this full parts catalog serves as a definitive procurement reference and on-site technical troubleshooting tool. Covering every wearable and structural component for the entire pump system, this collection eliminates the hassle of sourcing parts from multiple suppliers and ensures consistent quality, fit, and performance for every repair.
