top of page

Fluid End Parts & Expendables
(Full part list)

We offer a full list of parts needed per module.

American Mud Pumps parts are fully interchangeable with most of OEM parts.
National, Emsco, Gardner Denver, Oilwell, Lewco, Ideco, OPI, Bomco, LS, Skytop Brewster, Ellis Williams, Weatherford, Wilson, Workforce, Gaso, Southwest, among others.


 

NATIONAL 7-P-50

6 ¼ "× 7"

LINERS & LINERS SEALS

Size
High Chrome
Ceramic Zirconia
Liner Seal
6 ¼”
A-0257-62HP
A-0257-62Z
A-268
6"
A-0257-60HP
A-0257-60Z
A-280
5 ¾”
A-0257-56HP
A-0257-56Z
-
5 ½”
A-0257-54HP
A-0257-54Z
A-278
5”
A-0257-50HP
A-0257-50Z
A-276
4 ½”
A-0257-44HP
A-0257-44Z
A-274
4"
A-0257-40HP
A-0257-40Z
A-272

VALVES, SEATS, SPRINGS & INSERTS

Style
4 Web
Full Open
PULLER HEAD
A-1700-5
A-5-PH
PULLER ASSEMBLY*
A-1700
A-1700
SEAT PULLER ASSEMBLY
*Does not include puller head
INSERT-URETHANE HT
A-5-WI-HT
A-5-FI-HT
INSERT-URETHANE
A-5-WI
A-5-FI
VALVE SPRING
A-5710-115
A-5710-115
VALVE SEAT
A-5DD-B3
A-5-S3
VALVE ASSY-URETHANE HT
A-U5-B5-HT
A-5-V1-HT
VALVE ASSY-URETHANE
A-U5-B5
A-5-V1

PISTONS

Size
BORE HUB Ǿ SIZE
REPLACEABLE RUBBER PISTON ASSY
PISTON REPLACEMENT RUBBER KIT
BONDED RUBBER PISTON ASSY
SINGLE DUROMETER URETHANE BONDED
URETHANE BONDED HIGH TEMP.
6 ¼”
1½” & 1⅝”
I-62-L15
A-62L-KIT
LL-62-L15
LLU-62-L15
LLU-62-L15-HT
6"
1½” & 1⅝”
I-60-B15
A-60B-KIT
LL-60-B15
LLU-60-B15
LLU-60-B15-HT
5 ¾”
1½” & 1⅝”
I-56-B15
A-56B-KIT
LL-56-B15
LLU-56-B15
LLU-56-B15-HT
5 ½”
1½” & 1⅝”
I-54-B15
A-54B-KIT
LL-54-B15
LLU-54-B15
LLU-54-B15-HT
5"
1½” & 1⅝”
I-50-B15
A-50B-KIT
LL-50-B15
LLU-50-B15
LLU-50-B15-HT
4 ½”
1½” & 1⅝”
I-44-B15
A-44B-KIT
LL-44-B15
LLU-44-B15
LLU-44-B15-HT
4"
1½” & 1⅝”
I-40-K15
A-40K-KIT
LL-40-K15
LLU-40-K15
LLU-40-K15-HT

PISTON RODS, EXTENSION RODS & ACCESSORIES

Diameter
Piston Rod
Extension Rod
Rod Clamp
Sub Rod
Piston Rod Nut
1⅝”
A-1294147
A-1294083
A-1294085
A-1294146
A-50V14

GASKET

Valve Cover Gasket
Cylinder Head Gasket
A-788Z
-
FEEP-National 7-P-50

NATIONAL 8-P-80

6 ½" × 8 ½"

LINERS & LINERS SEALS

Size
High Chrome
Ceramic Zirconia
Liner Seal
4"
A-0256-40HP
A-0256-40Z
A-272
4 ½ "
A-0256-44HP
A-0256-44Z
A-274
5"
A-0256-50HP
A-0256-50Z
A-276
5 ½ "
A-0256-54HP
A-0256-54Z
A-278
5 ¾ "
A-0256-56HP
A-0256-56Z
-
6"
A-0256-60HP
A-0256-60Z
A-280
6 ¼ "
A-0256-62HP
A-0256-62Z
A-268
6 ½ "
A-0256-64HP
A-0256-64Z
A-268

VALVES, SEATS, SPRINGS & INSERTS

Style
4 Web
Full Open
VALVE ASSY-URETHANE
A-6-EH
A-6-V1
VALVE ASSY-URETHANE HT
A-6-EH-HT
A-6-V1-HT
VALVE SEAT
A-6ADD-B4
A-6-S4
VALVE SPRING
A-5710-115
A-5710-115
INSERT-URETHANE
A-6-WI
A-6-WI
INSERT-URETHANE HT
A-6-WI-HT
A-6-WI-HT
SEAT PULLER ASSEMBLY *Does not include puller head
PULLER ASSEMBLY *
A-1700
A-1700
PULLER HEAD
A-1700-6
A-6-PH

PISTONS

Size
BORE HUB Ǿ SIZE
REPLACEABLE RUBBER PISTON ASSY
PISTON REPLACEMENT RUBBER KIT
BONDED RUBBER PISTON ASSY
SINGLE DUROMETER URETHANE BONDED
URETHANE BONDED HIGH TEMP.
4"
1½” & 1⅝”
I-40-K15
A-40K-KIT
LL-40-K15
LLU-40-K15
LLU-40-K15-HT
4 ½ "
1½” & 1⅝”
I-44-B15
A-44B-KIT
LL-44-B15
LLU-44-B15
LLU-44-B15-HT
5"
1½” & 1⅝”
I-50-B15
A-50B-KIT
LL-50-B15
LLU-50-B15
LLU-50-B15-HT
5 ½ "
1½” & 1⅝”
I-54-B15
A-54B-KIT
LL-54-B15
LLU-54-B15
LLU-54-B15-HT
5 ¾ "
1½” & 1⅝”
I-56-B15
A-56B-KIT
LL-56-B15
LLU-56-B15
LLU-56-B15-HT
6"
1½” & 1