DZLA sales high quality OEM style aftermarket mud pump parts for the OILWELL A-850-PT Triplex Mud Pump.
We will provide you with the best quality and the best price.
Below is a listing of the OILWELL A-850-PT parts thatwe offer.

OILWELL A-850-PT
 MUD PUMP EXPENDABLES

7-1/2”× 9                                                                     A-850-PT

OILWELL A-850-PTPART NO.PART NO. PART NO.
Liners & Liner PackingGaskets 
SIZESLINERLINER PACKINGValve Cover GasketLAG-0760
4”LA-0289-40LAG-0753Cylinder Head GasketN/A
4”LA-0289-44LAG-0754  
5”LA-0289-50LAG-0742  
5”LA-0289-54LAG-0743  
6”LA-0289-60LAG-0745  
6”LA-0289-62LAG-0770  
6”LA-0289-64LAG-0746  
6”LA-0289-66LAG-0755  
7”LA-0289-70LAG-0756  
7”LA-0289-72LAG-0757  
7”LA-0289-74LAG-0758  
*Also available in small OD LA-0285-XX
SERIES  LA-4 WEB  LA-FULL OPEN  LA-G2LA-3 WEB  LA-ROUGHNECK  
VALVE (Urethane Insert)LA-U5C-EEFLA-7FO-V1LA-1560985LA-202PZL482ALA-RN7-V1
VALVE (Rubber Insert)LA-5C-EEFN/AN/ALA-202PZL483AN/A
VALVE SEATLA-7DD-B1LA-7FO-S1LA-1561370LA-202PZL039LA-RN7-S1
VALVE SPRINGLA-5710-110LA-5710-115LLA-1560702LA-5710-110LA-5710-110L
VALVE INSERT (Red Thunder)LA-UDD-7BHTN/AN/AN/AN/A
VALVE INSERT (Urethane)LA-UDD-7BLA-7FO-SILA-1560557LA-201PZL106LA-RN7-I
VALVE INSERT (Rubber)LA-DD-7BN/AN/ALA-202PZL106N/A
VALVE SEAT PULLER HEADLA-1700-7LA-1700-7FOLA-1700-7G2LA-1700-7RLA-1700-7FO
Piston Size   Bonded Pistons  Imperial Piston  Imperial Rubber Kits  Rubber Bonded  Long Life (Urethane) LL
4”LA-RT-400LA-I40HK14/15LA-I40HKLA-RB-400LA-LL-400
4”LA-RT-440LA-I44HK14/15LA-I44HKLA-RB-440LA-LL-440
5”LA-RT-500LA-I50HB14/15LA-I50HBLA-RB-500LA-LL-500
5”LA-RT-540LA-I54HB14/15LA-I54HBLA-RB-540LA-LL-540
6”LA-RT-600LA-I60HB14/15LA-I60HBLA-RB-600LA-LL-600
6”LA-RT-640LA-I64HL14/15LA-I64HLLA-RB-640LA-LL-640
7”LA-RT-700LA-I70HL14/15LA-I70HLLA-RB-700LA-LL-700
7”N/ALA-I74HL14/15LA-I74HLN/AN/A
*1/4 Size are available upon request1/4
RODS 
PISTON RODLA-0283-C
SUB RODLA-0283-A
CONNECTING STUDLA-0283-D
EXTENSION RODLA-16-0284
ROD CLAMPLA-24-0284
PISTON ROD NUTLA-7403364
OILWELL A-850-PT
FLUID END MODULE AND ACCESSORIES
ItemPart No.DescriptionQty per Pump
1LA-10-300-181Discharge Module, Studded (Included Items 2 – 6)263
2 Discharge Module, Only3
3LA-49-001-292Stud – Discharge Manifold12
4LA-75-511-754Nut – Discharge Manifold12
5LA-49-002-837Stud – Frame12
6LA-75-510-126Nut – Frame12
7LA-10-300-1841Wear Plate – Liner6
8LA-20-100-008Gasket – Liner Wear Plate6
9LA-75-632-234Cap Screw, Self Locking24
10LA-20-200-004Valve Guide Bushing6
11LA-10-300-004Valve Guide6
12LA-10-300-011Gasket – Valve Cover6
13LA-10-300-005Valve Cover6
14LA-10-300-183Liner Adapter3
15LA-10-303-092Nut – Liner Adapter3
16LA-10-300-185Spacer Ring – Liner3
17LA-10-303-0912 Centering Sleeve – Liner3
18LA-10-300-201Seal – Suction Manifold3
19LA-99-609-345Seal – Discharge Manifold3
1Offered in Plain Carbon or Stainless Steel 2Not used with 6″ and larger diameter liners. 1;26 1/2  

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