MUDKING MUD PUMP PARTS LIST
NATIONALJWS165/340
Liners & Liner Packing
SIZES LINER LINER PACKING
3” MK-0240-30 MK-1712064
3½” MK-0240-34 MK-1712064
4” MK-0240-40 MK-1712064
4½” MK-0240-44 MK-1712064
Gaskets
JWS165 MK-2410031-429
JWS340 MK-1718265
SERIES KING – G2 KING – G2
SUCTION DISCHARGE
VALVE (Urethane Insert) MK-1561575 MK-1561575
VALVE (Rubber Insert) N/A N/A
VALVE SEAT MK-1561571 MK-1561572
VALVE SPRING MK-1712211 MK-1712206
VALVE INSERT (Urethane) MK-1561577 MK-1561577
VALVE INSERT (Red Thunder) N/A N/A
VALVE INSERT (Rubber) N/A N/A
VALVE SEAT PULLER HEAD N/A N/A
Piston Size Red Thunder Bonded Pistons Imperial Piston Imperial Rubber Kits Rubber Bonded Long Life (Urethane)
3” N/A MK-I30HK10 MK-I30HK N/A N/A
3½” N/A MK-I34HK10 MK-I34HK N/A N/A
4” MK-RT-400 MK-I40HK10 MK-I40HB MK-RB-400-10 MK-LL-400-10
4½” MK-RT-440 MK-I44HK10 MK-I44HB MK-RB-440-10 MK-LL-440-10
- ¼ Size are available upon request
RODS
PISTON ROD SUB ROD EXTENSION ROD ROD CLAMP PISTON ROD NUT
ONE PIECE MK-0238 MK-16-0238 MK-24-0238 MK-7403224
TWO PIECE MK-0238-A MK-0238-B MK-16-0238 MK-24-0238 MK-7403224
NATIONAL
JWS400
Liners & Liner Packing
SIZES LINER LINER PACKING
4” MK-0237-40 MKG-0272
4½” MK-0237-44 MKG-0274
5” MK-0237-50 MKG-0276
5½” MK-0237-54 MKG-0278
Gaskets
Valve Cover Gasket
MK-1715146
Cylinder Head Gasket
N/A
SERIES KING – G2 KING – G2
SUCTION DISCHARGE
VALVE (Urethane Insert) MK-1561575 MK-1561575
VALVE (Rubber Insert) N/A N/A
VALVE SEAT MK-1561561 MK-1561569
VALVE SPRING MK-G-1560698 MK-1717296
VALVE INSERT (Urethane) MK-1561577 MK-1561577
VALVE INSERT (Red Thunder) N/A N/A
VALVE INSERT (Rubber) N/A N/A
VALVE SEAT PULLER HEAD N/A N/A
Piston Size Red Thunder Bonded Pistons Imperial Piston Imperial Rubber Kits Rubber Bonded Long Life (Urethane)
4” MK-RT-400 MK-I40HK10 MK-I40HK MK-RB-400 MK-LL-400
4½” MK-RT-440 MK-I44HK10 MK-I44HK MK-RB-440 MK-LL-440
5” MK-RT-500 MK-I50HK10 MK-I50HK MK-RB-500 MK-LL-500
5½” MK-RT-540 MK-I54HK10 MK-I54HK MK-RB-540 MK-LL-540
- ¼ Size are available upon request
RODS
PISTON ROD
EXTENSION
SUB ROD nnr.
ROD
ROD CLAMP
PISTON ROD NUT
PART NO.
MK-2239-A MK-2239-B MK-16-2239 MK-24-2239 MK-7403224
NATIONAL
7-P-50
Liners & Liner Packing
SIZES LINER LINER PACKING
4” MK-0257-40 MKG-0272
4½” MK-0257-44 MKG-0274
5” MK-0257-50 MKG-0276
5½” MK-0257-54 MKG-0278
6” MK-0257-60 MKG-0280
6¼” MK-0257-62 MKG-0268
Gaskets
Valve Cover Gasket
MK-61-0253
Cylinder Head Gasket
N/A
SERIES KING – 4 WEB KING – FULL OPEN
VALVE (Urethane Insert) MK-U5B-05 MK-5FO-V1
VALVE (Rubber Insert) MK-5B-05 N/A
VALVE SEAT MK-5DD-B3 MK-5FO-S3
VALVE SPRING MK-5710-111 MK-5710-30
VALVE INSERT (Urethane) MK-UDD-5B MK-5FO-SI
VALVE INSERT (Rubber) MK-DD-5B N/A
VALVE SEAT PULLER HEAD MK-1700-5 MK-1700-5FO
Piston Size Red Thunder Bonded Pistons Imperial Piston Imperial Rubber Kits Rubber Bonded Long Life (Urethane)
4” MK-RT-400 MK-I40HK14/15 MK-I40HK MK-RB-400 MK-LL-400
4½” MK-RT-440 MK-I44HK14/15 MK-I44HK MK-RB-440 MK-LL-440
5” MK-RT-500 MK-I50HB14/15 MK-I50HB MK-RB-500 MK-LL-500
5½” MK-RT-540 MK-I54HB14/15 MK-I54HB MK-RB-540 MK-LL-540
6” MK-RT-600 MK-I60HB14/15 MK-I60HB MK-RB-600 MK-LL-600
RODS
PISTON ROD
EXTENSION
SUB ROD nnr.
ROD
ROD CLAMP
PISTON ROD NUT
PART NO. MK-0257-A MK-0257-B MK-16-0257 MK-24-0257 MK-7403364
NATIONAL
8-P-80
Liners & Liner Packing
SIZES LINER LINER PACKING
4” MK-0256-40 MKG-0272
4½” MK-0256-44 MKG-0274
5” MK-0256-50 MKG-0276
5½” MK-0256-54 MKG-0278
6” MK-0256-60 MKG-0280
6¼” MK-0256-62 MKG-0268
6½” MK-0256-64 MKG-0268
Gaskets
Valve Cover Gasket
MK-61-0255
Cylinder Head Gasket
N/A
SERIES KING-4 WEB KING-FULL OPEN KING-G2 MKP-ROUGHNECK
VALVE (Urethane Insert) MK-U5B-EH MK-6FO-V1 MK-1560995 MK-RN6-V1
VALVE (Rubber Insert) MK-5B-EH N/A N/A N/A
VALVE SEAT MK-6ADD-B4 MK-6FO-S4 MK-1561450 MK-RN6-S4
VALVE SPRING MK-5710-115 MK-5710-115 MK-1560701 MK-5710-115
VALVE INSERT (Red Thunder) MK-UDD-6ABHT N/A N/A N/A
VALVE INSERT (Urethane) MK-UDD-6B MK-6FO-SI MK-1560587 MK-RN6-I
VALVE INSERT (Rubber) MK-DD-6B N/A N/A N/A
VALVE SEAT PULLER HEAD MK-1700-6 MK-1700-6FO MK-1700-6G2 MK-1700-6FO
Piston Size Red Thunder Bonded Pistons Imperial Piston Imperial Rubber Kits Rubber Bonded Long Life (Urethane)
4” MK-RT-400 MK-I40HK14/15 MK-I40HK MK-RB-400 MK-LL-400
4½” MK-RT-440 MK-I44HK14/15 MK-I44HK MK-RB-440 MK-LL-440
5” MK-RT-500 MK-I50HB14/15 MK-I50HB MK-RB-500 MK-LL-500
5½” MK-RT-540 MK-I54HB14/15 MK-I54HB MK-RB-540 MK-LL-540
6” MK-RT-600 MK-I60HB14/15 MK-I60HB MK-RB-600 MK-LL-600
6½” MK-RT-640 MK-I64HB14/15 MK-I64HB MK-RB-640 MK-LL-640
- ¼ Size are available upon request
RODS
PART NO.
PISTON ROD MK-0259-A
SUB ROD MK-0259-B
EXTENSION ROD MK-16-0259
ROD CLAMP MK-24-0259
PISTON ROD NUT MK-7403364
NATIONAL
9-P-100
Liners & Liner Packing
SIZES LINER LINER PACKING
PART NO. PART NO.
4” N/A N/A
4½” MK-0255-44 MKG-0274
5” MK-0255-50 MKG-0265
5½” MK-0255-54 MKG-0263
6” MK-0255-60 MKG-0261
6¼” MK-255-62 MKG-0283
6½” MK-0255-64 MKG-0768
6¾” MK-0255-66 MKG-0287
Gaskets
Valve Cover Gasket Cylinder Head Gasket
PART NO. PART NO.
MK-61-0255 N/A
SERIES KING-4 WEB KING-FULL OPEN KING-G2 MKP-ROUGHNECK
VALVE (Urethane Insert) MK-U5B-EH MK-6FO-V1 MK-1560995 MK-RN6-V1
VALVE (Rubber Insert) MK-5B-EH N/A N/A N/A
VALVE SEAT MK-6ADD-B4 MK-6FO-S4 MK-1561450 MK-RN6-S4
VALVE SPRING MK-5710-115 MK-5710-115 MK-1560701 MK-5710-115
VALVE INSERT (Red Thunder) MK-UDD-6ABHT N/A N/A N/A
VALVE INSERT (Urethane) MK-UDD-6B MK-6FO-SI MK-1560587 MK-RN6-I
VALVE INSERT (Rubber) MK-DD-6B N/A N/A N/A
VALVE SEAT PULLER HEAD MK-1700-6 MK-1700-6FO MK-1700-6G2 MK-1700-6FO
Piston Size Red Thunder Bonded Pistons Imperial Piston Imperial Rubber Kits Rubber Bonded Long Life (Urethane)
4” MK-RT-400 MK-I40HK14/15 MK-I40HK MK-RB-400 MK-LL-400
4½” MK-RT-440 MK-I44HK14/15 MK-I44HK MK-RB-440 MK-LL-440
5” MK-RT-500 MK-I50HB14/15 MK-I50HB MK-RB-500 MK-LL-500
5½” MK-RT-540 MK-I54HB14/15 MK-I54HB MK-RB-540 MK-LL-540
6” MK-RT-600 MK-I60HB14/15 MK-I60HB MK-RB-600 MK-LL-600
6½” MK-RT-640 MK-I64HL14/15 MK-I64HL MK-RB-640 MK-LL-640
- ¼ Size are available upon request
RODS
PART NO.
PISTON ROD MK-0260-A
SUB ROD MK-0260-B
EXTENSION ROD MK-16-0260
ROD CLAMP MK-24-0260
PISTON ROD NUT MK-7403364
NATIONAL
10-P-130
Liners & Liner Packing
SIZES LINER LINER PACKING
4” N/A N/A
4½” MK-0255-44 MKG-0274
5” MK-0255-50 MKG-0265
5½” MK-0255-54 MKG-0263
6” MK-0255-60 MKG-0261
6¼” MK-255-62 MKG-0283
6½” MK-0255-64 MKG-0768
6¾” MK-0255-66 MKG-0287
Gaskets
Valve Cover Gasket
MK-61-0255
Cylinder Head Gasket
N/A
SERIES KING-4 WEB KING-FULL OPEN KING-G2 MKP-ROUGHNECK
VALVE (Urethane Insert) MK-U5B-EH MK-6FO-V1 MK-1560995 MK-RN6-V1
VALVE (Rubber Insert) MK-5B-EH N/A N/A N/A
VALVE SEAT MK-6ADD-B4 MK-6FO-S4 MK-1561450 MK-RN6-S4
VALVE SPRING MK-5710-115 MK-5710-115 MK-1560701 MK-5710-115
VALVE INSERT (Red Thunder) MK-UDD-6ABHT N/A N/A N/A
VALVE INSERT (Urethane) MK-UDD-6B MK-6FO-SI MK-1560587 MK-RN6-I
VALVE INSERT (Rubber) MK-DD-6B N/A N/A N/A
VALVE SEAT PULLER HEAD MK-1700-6 MK-1700-6FO MK-1700-6G2 MK-1700-6FO
Piston Size Red Thunder Bonded Pistons Imperial Piston Imperial Rubber Kits Rubber Bonded Long Life (Urethane)
4” MK-RT-400 MK-I40HK14/15 MK-I40HK MK-RB-400 MK-LL-400
4½” MK-RT-440 MK-I44HK14/15 MK-I44HK MK-RB-440 MK-LL-440
5” MK-RT-500 MK-I50HB14/15 MK-I50HB MK-RB-500 MK-LL-500
5½” MK-RT-540 MK-I54HB14/15 MK-I54HB MK-RB-540 MK-LL-540
6” MK-RT-600 MK-I60HB14/15 MK-I60HB MK-RB-600 MK-LL-600
6½” MK-RT-640 MK-I64HL14/15 MK-I64HL MK-RB-640 MK-LL-640
- ¼ Size are available upon request
PART NUMBER
PISTON ROD
MK-0256-A
RODS
EXTENSION
SUB ROD
ROD
MK-0256-B
MK-16-0256
NATIONAL
7½ × 12
Liners & Liner Packing
SIZES LINER LINER PACKING
4” MK-0259-40 MKG-0265
4½” MK-0259-44 MKG-0265
5” MK-0259-50 MKG-0265
5½” MK-0259-54 MKG-0263
6” MK-0259-60 MKG-0261
6¼” MK-0259-62 MKG-0283
6½” MK-0259-64 MKG-0284
6¾” MK-0259-66 MKG-0287
7” MK-0259-70 MKG-0285
7¼” MK-0259-72 MKG-0286
7½” MK-0259-74 N/A
12-P-160
Cylinder Head Gasket
N/A
SERIES KING-4 WEB KING-FULL OPEN KING-G2 MKP-ROUGHNECK
VALVE (Urethane Insert) MK-U5C-EEF MK-7FO-V1 MK-1560985 MK-RN7-V1
VALVE (Rubber Insert) MK-5C-EEF N/A N/A N/A
VALVE SEAT MK-7DD-B12 MK-7FO-S4 MK-1561440 MK-RN7-S12
VALVE SPRING MK-5710-110 MK-5710-115L MK-1560702 MK-5710-110
VALVE INSERT (Red Thunder) MK-UDD-7BHT N/A N/A N/A
VALVE INSERT (Urethane) MK-UDD-7B MK-7FO-SI MK-1560557 MK-RN7-I
VALVE INSERT (Rubber) MK-DD-7B N/A N/A N/A
VALVE SEAT PULLER HEAD MK-1700-7 MK-1700-7FO MK-1700-7GR MK-1700-7FO
Piston Size Red Thunder Bonded Pistons Imperial Piston Imperial Rubber Kits Rubber Bonded Long Life (Urethane)
4” MK-RT-400 MK-I40HK14/15 MK-I40HK MK-RB-400 MK-LL-400
4½” MK-RT-440 MK-I44HK14/15 MK-I44HK MK-RB-440 MK-LL-440
5” MK-RT-500 MK-I50HB14/15 MK-I50HB MK-RB-500 MK-LL-500
5½” MK-RT-540 MK-I54HB14/15 MK-I54HB MK-RB-540 MK-LL-540
6” MK-RT-600 MK-I60HB14/15 MK-I60HB MK-RB-600 MK-LL-600
6½” MK-RT-640 MK-I64HL14/15 MK-I64HL MK-RB-640 MK-LL-640
7” MK-RT-700 MK-I70HL14/15 MK-I70HL MK-RB-700 MK-LL-700
7½” N/A MK-I74HL14/15 MK-I70HL MK-RB-740 MK-LL-740
- ¼ Size are available upon request
RODS
PISTON ROD SUB ROD EXTENSION ROD ROD CLAMP PISTON ROD NUT
PART NO. MK-0258-A MK-0258-B MK-16-0258 MK-24-0258 MK-7403364