John Gear Pumps - JK Series

Introducing our premium aftermarket gear pumps, designed to elevate performance in a variety of applications. Crafted with precision and built to meet the demands of higher flow rate scenarios, our aftermarket gear pumps are an excellent alternative to the Muncie® PK Series.
Gear Pump 21 Series, PK Series, JK Series
PK/PL series pump dimention reference
Specs
Displacement in³/rev: 
Max continuous pressure: 
 psi
Max RPM: 
Side Ports (A): 
Rear Ports (B): 
Dimensions (Inches)
Length (W): 
Gear Housing Length (G): 
PEC Length (P): 
PEC Width (C): 
Width (D): 
Reference
John Gear Pumps®: 
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Replaces: 
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Select flow rate:
PUMP AVERAGE OUTPUT AT 2500 PSI (175 BAR)
 
    
1000 RPM
1200 RPM
1600 RPM
2000 RPM
2200 RPM
½"
4.0 GPM
15 LPM
5.0 GPM
18.5 LPM
6.5 GPM
24.5 LPM
8.5 GPM
32 LPM
9 GPM
34 LPM
¾"
6.0 GPM
22.5 LPM
7.5 GPM
28 LPM
10 GPM
37.5 LPM
12.5 GPM
47 LPM
14 GPM
53 LPM
1"
8.0 GPM
30 LPM
10 GPM
37.5 LPM
13.5 GPM
51 LPM
17 GPM
64 LPM
18.5 GPM
70 LPM
1 ¼"
11 GPM
41.5 LPM
13 GPM
49 LPM
17 GPM
64 LPM
21 GPM
79 LPM
23 GPM
87 LPM
1 ½"
13 GPM
49 LPM
15 GPM
57 LPM
20.5 GPM
78 LPM
25.5 GPM
97 LPM
28 GPM
106 LPM
1 ¾"
15 GPM
57 LPM
18 GPM
68 LPM
24 GPM
91 LPM
30 GPM
113 LPM
33 GPM
125 LPM
2"
17 GPM
57 LPM
18 GPM
68 LPM
24 GPM
91 LPM
30 GPM
113 LPM
33 GPM
125 LPM
GPM & LPM are approximated and rounded.
Please use the cu-in displacement and the hydraulic caculator for more precise figures
Select shaft:
SAE-B
7/8" 13-Tooth Spline
13 Tooth Shaft for gear pump
SAE-B
7/8" Keyed
Keyed Shaft for gear pump
SAE-B-B
1" 15-Tooth Spline
15 Tooth Shaft for gear pump
Select mount:
SAE-A
2 Bolt
2 Bolt B shaft end cover for gear pump
SAE-B
2/4 Bolt
2 and 4 Bolt B shaft end cover for gear pump
SAE-B Short
2 Bolt - Type 2
2 Bolt B short or type 2 shaft end cover for gear pump
SAE-B
4 Bolt
4 Bolt B shaft end cover for gear pump
Select porting:
NPT - National Pipe Thread
ORB - O-Ring Boss
Open in pump builder
The cross-referenced parts from the Original Equipment Manufacturer (OEM) listed here are for informational purposes only. Trademarks identifying these parts for cross-reference belong to their respective OEMs and are their exclusive property. John Gear Pumps and its affiliates do not use, nor are authorized to use, these trademarks. It is important to clarify that John Gear Pumps is an independent entity, not affiliated with the OEM, and is not licensed or authorized to produce parts for the OEM.