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Company News · Model reference guide

Oilwell A-350-PT Mud Pump Spare Parts

Published by Pratt Oil ·

Pratt OilParts identification
Oilwell A-350-PT source expendables reference table

Oilwell A-350-PT reference MK-0287-40 identifies a nominal 4-inch liner, with piston and valve parts listed separately. Match the liner bore and installed piston arrangement before selecting replacement wear components. For a quotation, send the part or drawing number, quantity, pump model and nameplate photo.

Parts List

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Download parts list (CSV)

85 parts

P/PPart / Drawing No.NamePart / Drawing No.Name
1MK-0287-40Liner, nominal size 4''MK-1700-6FOPuller Head; catalogue valve family MKP-ROUGHNECK
2MKG-0753Liner Packing, nominal size 4''MK-RT-400Red Thunder Bonded Pistons; nominal piston size 4''
3MK-0287-44Liner, nominal size 4½''MK-I40HK14/15Imperial Piston; nominal piston size 4''
4MKG-0754Liner Packing, nominal size 4½''MK-I40HKImperial Rubber Kits; nominal piston size 4''
5MK-0287-50Liner, nominal size 5''MK-RB-400Rubber Bonded; nominal piston size 4''
6MKG-0742Liner Packing, nominal size 5''MK-LL-400Long Life (Urethane); nominal piston size 4''
7MK-0287-54Liner, nominal size 5½''MK-RT-440Red Thunder Bonded Pistons; nominal piston size 4½''
8MKG-0743Liner Packing, nominal size 5½''MK-I44HK14/15Imperial Piston; nominal piston size 4½''
9MK-0287-60Liner, nominal size 6''MK-I44HKImperial Rubber Kits; nominal piston size 4½''
10MKG-0745Liner Packing, nominal size 6''MK-RB-440Rubber Bonded; nominal piston size 4½''
11MK-0287-62Liner, nominal size 6¼''MK-LL-440Long Life (Urethane); nominal piston size 4½''
12MKG-0770Liner Packing, nominal size 6¼''MK-RT-500Red Thunder Bonded Pistons; nominal piston size 5''
13MK-0287-64Liner, nominal size 6½''MK-I50HB14/15Imperial Piston; nominal piston size 5''
14MKG-0746Liner Packing, nominal size 6½''MK-I50HBImperial Rubber Kits; nominal piston size 5''
15MK-0287-66Liner, nominal size 6¾''MK-RB-500Rubber Bonded; nominal piston size 5''
16MKG-0755Liner Packing, nominal size 6¾''MK-LL-500Long Life (Urethane); nominal piston size 5''
17MK-0287-70Liner, nominal size 7''MK-RT-540Red Thunder Bonded Pistons; nominal piston size 5½''
18MKG-0756Liner Packing, nominal size 7''MK-I54HB14/15Imperial Piston; nominal piston size 5½''
19MKG-0732Valve Cover GasketMK-I54HBImperial Rubber Kits; nominal piston size 5½''
20MK-U5B-EHValve; catalogue valve family MKP-4 WEBMK-RB-540Rubber Bonded; nominal piston size 5½''
21MK-6ADD-B6Seat; catalogue valve family MKP-4 WEBMK-LL-540Long Life (Urethane); nominal piston size 5½''
22MK-5710-111Spring; catalogue valve family MKP-4 WEBMK-RT-600Red Thunder Bonded Pistons; nominal piston size 6''
23MK-UDD-6ABUrethane Insert; catalogue valve family MKP-4 WEBMK-I60HB14/15Imperial Piston; nominal piston size 6''
24MK-1700-6Puller Head; catalogue valve family MKP-4 WEBMK-I60HBImperial Rubber Kits; nominal piston size 6''
25MK-U5B-EHHTValve; catalogue valve family MKP-4 WEB HIGH TEMPMK-RB-600Rubber Bonded; nominal piston size 6''
26MK-6ADD-B6Seat; catalogue valve family MKP-4 WEB HIGH TEMPMK-LL-600Long Life (Urethane); nominal piston size 6''
27MK-5710-111Spring; catalogue valve family MKP-4 WEB HIGH TEMPMK-RT-640Red Thunder Bonded Pistons; nominal piston size 6½''
28MK-UDD-6ABHTUrethane Insert; catalogue valve family MKP-4 WEB HIGH TEMPMK-I64HL14/15Imperial Piston; nominal piston size 6½''
29MK-1700-6Puller Head; catalogue valve family MKP-4 WEB HIGH TEMPMK-I64HLImperial Rubber Kits; nominal piston size 6½''
30MK-6FO-V1Valve; catalogue valve family MKP-FULL OPENMK-RB-640Rubber Bonded; nominal piston size 6½''
31MK-6FO-S1Seat; catalogue valve family MKP-FULL OPENMK-LL-640Long Life (Urethane); nominal piston size 6½''
32MK-5710-115Spring; catalogue valve family MKP-FULL OPENMK-RT-700Red Thunder Bonded Pistons; nominal piston size 7''
33MK-6FO-SIUrethane Insert; catalogue valve family MKP-FULL OPENMK-I70HL14/15Imperial Piston; nominal piston size 7''
34MK-1700-6FOPuller Head; catalogue valve family MKP-FULL OPENMK-I70HLImperial Rubber Kits; nominal piston size 7''
35MK-1560995Valve; catalogue valve family MKP-G2MK-RB-700Rubber Bonded; nominal piston size 7''
36MK-1561380Seat; catalogue valve family MKP-G2MK-LL-700Long Life (Urethane); nominal piston size 7''
37MK-1560701Spring; catalogue valve family MKP-G2MK-0283-CPiston Rod; part no.
38MK-1560587Urethane Insert; catalogue valve family MKP-G2MK-0283-BSub Rod; part no.
39MK-1700-6G2Puller Head; catalogue valve family MKP-G2MK-0283-DConnecting Rod; part no.
40MK-RN6-V1Valve; catalogue valve family MKP-ROUGHNECKMK-16-0282Extension Rod; part no.
41MK-RN6-S6Seat; catalogue valve family MKP-ROUGHNECKMK-24-0284Rod Clamp; part no.
42MK-5710-111Spring; catalogue valve family MKP-ROUGHNECKMK-7403364Piston Rod Nut; part no.
43MK-RN6-IUrethane Insert; catalogue valve family MKP-ROUGHNECK
Technical details and source references

Confirm the installed model, drawing revision and dimensions before ordering. Catalogue quantities do not indicate current stock.

Reference documents and scope

  • S1 — Mud King Products, Mud Pump Expendables / Triplex Fluid End Parts (source catalogue edition undated). Reference file: EMSCO-MK-美国泥浆泵.pdf.

PDF page numbers count from the first page of each reference file. Brand names identify the equipment or catalogue source. A listed number does not establish interchangeability, original-manufacturer authorisation, stock or a delivery commitment. Send the nameplate, complete reference, quantity and drawing revision for a parts review.

For a Oilwell A-350-PT mud pump parts enquiry, the complete component reference is more useful than the pump model alone. The Mud King Products catalogue separates expendable parts by nominal size, component family and installed arrangement. This guide transcribes the identifiable supplier-number entries associated with Oilwell A-350-PT, with their original page and table context, so a buyer can assemble a clearer maintenance RFQ.

References from the Joint A-350/600-PT Sheet

The rendered catalogue page is headed A-350/600-PT, although the contents entry names only A-600-PT. This guide preserves the A-350 identification actually printed on that page and treats its expendables list as a shared source table. It does not infer that every A-350 assembly is interchangeable with an A-600 configuration.

The sheet lists MK-0287-series liners and size-specific packing references. Its rod row gives MK-0283-C for the piston rod, MK-0283-B for the sub rod and MK-0283-D for the connecting rod. The later module table is headed only A-600-PT and is therefore not automatically added here as A-350 module evidence. Supply the A-350 nameplate and module identification if an assembly is required.

Read the catalogue reference correctly

The accompanying reference list covers the identifiable number-bearing cells in the relevant source tables, not a complete original-manufacturer bill of materials. MK and MKG identify supplier catalogue references; their prefixes, punctuation and combined suffixes are retained. A value marked N/A or left blank is not replaced by an invented number. A shared model heading records the catalogue scope and does not by itself confirm interchangeability on an individual pump.

Information to send for parts matching

Send the pump nameplate and serial number, full reference including its prefix, required quantity and a photograph of the installed or removed component. For liners and pistons, add the nominal size and sealing arrangement. For fluid-end hardware, identify the module configuration and whether an individual component or a studded assembly is required. Keep any original equipment drawing number as a separate field rather than stripping the supplier prefix to assume an OEM match.

Review mud pump spare parts matching, compare liners, pistons, valves and seats, or send Pratt Oil a parts list for review. Matching and availability require confirmation; these references do not establish authorisation, inventory or a delivery promise.

  1. MK-0287-40 — S1 , PDF p. 24 — Liners and liner packing; source row 4''; Mud King supplier catalogue number
  2. MKG-0753 — S1 , PDF p. 24 — Liners and liner packing; source row 4''; Mud King supplier catalogue number
  3. MK-0287-44 — S1 , PDF p. 24 — Liners and liner packing; source row 4½''; Mud King supplier catalogue number
  4. MKG-0754 — S1 , PDF p. 24 — Liners and liner packing; source row 4½''; Mud King supplier catalogue number
  5. MK-0287-50 — S1 , PDF p. 24 — Liners and liner packing; source row 5''; Mud King supplier catalogue number
  6. MKG-0742 — S1 , PDF p. 24 — Liners and liner packing; source row 5''; Mud King supplier catalogue number
  7. MK-0287-54 — S1 , PDF p. 24 — Liners and liner packing; source row 5½''; Mud King supplier catalogue number
  8. MKG-0743 — S1 , PDF p. 24 — Liners and liner packing; source row 5½''; Mud King supplier catalogue number
  9. MK-0287-60 — S1 , PDF p. 24 — Liners and liner packing; source row 6''; Mud King supplier catalogue number
  10. MKG-0745 — S1 , PDF p. 24 — Liners and liner packing; source row 6''; Mud King supplier catalogue number
  11. MK-0287-62 — S1 , PDF p. 24 — Liners and liner packing; source row 6¼''; Mud King supplier catalogue number
  12. MKG-0770 — S1 , PDF p. 24 — Liners and liner packing; source row 6¼''; Mud King supplier catalogue number
  13. MK-0287-64 — S1 , PDF p. 24 — Liners and liner packing; source row 6½''; Mud King supplier catalogue number
  14. MKG-0746 — S1 , PDF p. 24 — Liners and liner packing; source row 6½''; Mud King supplier catalogue number
  15. MK-0287-66 — S1 , PDF p. 24 — Liners and liner packing; source row 6¾''; Mud King supplier catalogue number
  16. MKG-0755 — S1 , PDF p. 24 — Liners and liner packing; source row 6¾''; Mud King supplier catalogue number
  17. MK-0287-70 — S1 , PDF p. 24 — Liners and liner packing; source row 7''; Mud King supplier catalogue number
  18. MKG-0756 — S1 , PDF p. 24 — Liners and liner packing; source row 7''; Mud King supplier catalogue number
  19. MKG-0732 — S1 , PDF p. 24 — Gaskets; Mud King supplier catalogue number
  20. MK-U5B-EH — S1 , PDF p. 24 — Valve family MKP-4 WEB; Mud King supplier catalogue number
  21. MK-6ADD-B6 — S1 , PDF p. 24 — Valve family MKP-4 WEB; Mud King supplier catalogue number
  22. MK-5710-111 — S1 , PDF p. 24 — Valve family MKP-4 WEB; Mud King supplier catalogue number
  23. MK-UDD-6AB — S1 , PDF p. 24 — Valve family MKP-4 WEB; Mud King supplier catalogue number
  24. MK-1700-6 — S1 , PDF p. 24 — Valve family MKP-4 WEB; Mud King supplier catalogue number
  25. MK-U5B-EHHT — S1 , PDF p. 24 — Valve family MKP-4 WEB HIGH TEMP; Mud King supplier catalogue number
  26. MK-6ADD-B6 — S1 , PDF p. 24 — Valve family MKP-4 WEB HIGH TEMP; Mud King supplier catalogue number
  27. MK-5710-111 — S1 , PDF p. 24 — Valve family MKP-4 WEB HIGH TEMP; Mud King supplier catalogue number
  28. MK-UDD-6ABHT — S1 , PDF p. 24 — Valve family MKP-4 WEB HIGH TEMP; Mud King supplier catalogue number
  29. MK-1700-6 — S1 , PDF p. 24 — Valve family MKP-4 WEB HIGH TEMP; Mud King supplier catalogue number
  30. MK-6FO-V1 — S1 , PDF p. 24 — Valve family MKP-FULL OPEN; Mud King supplier catalogue number
  31. MK-6FO-S1 — S1 , PDF p. 24 — Valve family MKP-FULL OPEN; Mud King supplier catalogue number
  32. MK-5710-115 — S1 , PDF p. 24 — Valve family MKP-FULL OPEN; Mud King supplier catalogue number
  33. MK-6FO-SI — S1 , PDF p. 24 — Valve family MKP-FULL OPEN; Mud King supplier catalogue number
  34. MK-1700-6FO — S1 , PDF p. 24 — Valve family MKP-FULL OPEN; Mud King supplier catalogue number
  35. MK-1560995 — S1 , PDF p. 24 — Valve family MKP-G2; Mud King supplier catalogue number
  36. MK-1561380 — S1 , PDF p. 24 — Valve family MKP-G2; Mud King supplier catalogue number
  37. MK-1560701 — S1 , PDF p. 24 — Valve family MKP-G2; Mud King supplier catalogue number
  38. MK-1560587 — S1 , PDF p. 24 — Valve family MKP-G2; Mud King supplier catalogue number
  39. MK-1700-6G2 — S1 , PDF p. 24 — Valve family MKP-G2; Mud King supplier catalogue number
  40. MK-RN6-V1 — S1 , PDF p. 24 — Valve family MKP-ROUGHNECK; Mud King supplier catalogue number
  41. MK-RN6-S6 — S1 , PDF p. 24 — Valve family MKP-ROUGHNECK; Mud King supplier catalogue number
  42. MK-5710-111 — S1 , PDF p. 24 — Valve family MKP-ROUGHNECK; Mud King supplier catalogue number
  43. MK-RN6-I — S1 , PDF p. 24 — Valve family MKP-ROUGHNECK; Mud King supplier catalogue number
  44. MK-1700-6FO — S1 , PDF p. 24 — Valve family MKP-ROUGHNECK; Mud King supplier catalogue number
  45. MK-RT-400 — S1 , PDF p. 24 — Piston family Red Thunder Bonded Pistons; size 4''; Mud King supplier catalogue number
  46. MK-I40HK14/15 — S1 , PDF p. 24 — Piston family Imperial Piston; size 4''; Mud King supplier catalogue number
  47. MK-I40HK — S1 , PDF p. 24 — Piston family Imperial Rubber Kits; size 4''; Mud King supplier catalogue number
  48. MK-RB-400 — S1 , PDF p. 24 — Piston family Rubber Bonded; size 4''; Mud King supplier catalogue number
  49. MK-LL-400 — S1 , PDF p. 24 — Piston family Long Life (Urethane); size 4''; Mud King supplier catalogue number
  50. MK-RT-440 — S1 , PDF p. 24 — Piston family Red Thunder Bonded Pistons; size 4½''; Mud King supplier catalogue number
  51. MK-I44HK14/15 — S1 , PDF p. 24 — Piston family Imperial Piston; size 4½''; Mud King supplier catalogue number
  52. MK-I44HK — S1 , PDF p. 24 — Piston family Imperial Rubber Kits; size 4½''; Mud King supplier catalogue number
  53. MK-RB-440 — S1 , PDF p. 24 — Piston family Rubber Bonded; size 4½''; Mud King supplier catalogue number
  54. MK-LL-440 — S1 , PDF p. 24 — Piston family Long Life (Urethane); size 4½''; Mud King supplier catalogue number
  55. MK-RT-500 — S1 , PDF p. 24 — Piston family Red Thunder Bonded Pistons; size 5''; Mud King supplier catalogue number
  56. MK-I50HB14/15 — S1 , PDF p. 24 — Piston family Imperial Piston; size 5''; Mud King supplier catalogue number
  57. MK-I50HB — S1 , PDF p. 24 — Piston family Imperial Rubber Kits; size 5''; Mud King supplier catalogue number
  58. MK-RB-500 — S1 , PDF p. 24 — Piston family Rubber Bonded; size 5''; Mud King supplier catalogue number
  59. MK-LL-500 — S1 , PDF p. 24 — Piston family Long Life (Urethane); size 5''; Mud King supplier catalogue number
  60. MK-RT-540 — S1 , PDF p. 24 — Piston family Red Thunder Bonded Pistons; size 5½''; Mud King supplier catalogue number
  61. MK-I54HB14/15 — S1 , PDF p. 24 — Piston family Imperial Piston; size 5½''; Mud King supplier catalogue number
  62. MK-I54HB — S1 , PDF p. 24 — Piston family Imperial Rubber Kits; size 5½''; Mud King supplier catalogue number
  63. MK-RB-540 — S1 , PDF p. 24 — Piston family Rubber Bonded; size 5½''; Mud King supplier catalogue number
  64. MK-LL-540 — S1 , PDF p. 24 — Piston family Long Life (Urethane); size 5½''; Mud King supplier catalogue number
  65. MK-RT-600 — S1 , PDF p. 24 — Piston family Red Thunder Bonded Pistons; size 6''; Mud King supplier catalogue number
  66. MK-I60HB14/15 — S1 , PDF p. 24 — Piston family Imperial Piston; size 6''; Mud King supplier catalogue number
  67. MK-I60HB — S1 , PDF p. 24 — Piston family Imperial Rubber Kits; size 6''; Mud King supplier catalogue number
  68. MK-RB-600 — S1 , PDF p. 24 — Piston family Rubber Bonded; size 6''; Mud King supplier catalogue number
  69. MK-LL-600 — S1 , PDF p. 24 — Piston family Long Life (Urethane); size 6''; Mud King supplier catalogue number
  70. MK-RT-640 — S1 , PDF p. 24 — Piston family Red Thunder Bonded Pistons; size 6½''; Mud King supplier catalogue number
  71. MK-I64HL14/15 — S1 , PDF p. 24 — Piston family Imperial Piston; size 6½''; Mud King supplier catalogue number
  72. MK-I64HL — S1 , PDF p. 24 — Piston family Imperial Rubber Kits; size 6½''; Mud King supplier catalogue number
  73. MK-RB-640 — S1 , PDF p. 24 — Piston family Rubber Bonded; size 6½''; Mud King supplier catalogue number
  74. MK-LL-640 — S1 , PDF p. 24 — Piston family Long Life (Urethane); size 6½''; Mud King supplier catalogue number
  75. MK-RT-700 — S1 , PDF p. 24 — Piston family Red Thunder Bonded Pistons; size 7''; Mud King supplier catalogue number
  76. MK-I70HL14/15 — S1 , PDF p. 24 — Piston family Imperial Piston; size 7''; Mud King supplier catalogue number
  77. MK-I70HL — S1 , PDF p. 24 — Piston family Imperial Rubber Kits; size 7''; Mud King supplier catalogue number
  78. MK-RB-700 — S1 , PDF p. 24 — Piston family Rubber Bonded; size 7''; Mud King supplier catalogue number
  79. MK-LL-700 — S1 , PDF p. 24 — Piston family Long Life (Urethane); size 7''; Mud King supplier catalogue number
  80. MK-0283-C — S1 , PDF p. 24 — Rod arrangement PART NO.; Mud King supplier catalogue number
  81. MK-0283-B — S1 , PDF p. 24 — Rod arrangement PART NO.; Mud King supplier catalogue number
  82. MK-0283-D — S1 , PDF p. 24 — Rod arrangement PART NO.; Mud King supplier catalogue number
  83. MK-16-0282 — S1 , PDF p. 24 — Rod arrangement PART NO.; Mud King supplier catalogue number
  84. MK-24-0284 — S1 , PDF p. 24 — Rod arrangement PART NO.; Mud King supplier catalogue number
  85. MK-7403364 — S1 , PDF p. 24 — Rod arrangement PART NO.; Mud King supplier catalogue number

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