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HYDRAULIC PUMP FLOW RATE CHART
PARKER TYPE A PUMP / SERPENTINE BELT / CLUTCH - 6" dia.
    SIZE GALLONS PER MINUTE @ GIVEN RPM
Rated GPM cu. in. 625 675 750 875 1000 1250 1500 1750
17 2.02 6.5 7.0 7.8 9.1 10.4 13.0 15.6 18.2
12 1.40 4.5 4.9 5.4 6.3 7.2 9.0 10.8 12.6
9 1.09 3.5 3.8 4.2 4.9 5.6 7.0 8.4 9.8
7 0.93 3.0 3.2 3.6 4.2 4.8 6.0 7.2 8.4
5 0.62 2.0 2.2 2.4 2.8 3.2 4.0 4.8 5.6
(1600 RPM)   Typical RPM at Idle  
Cummins  Most  Most  Pre 2005  * 2005+ Tritons idle at 675 RPM
diesel diesel gasoline Ford Triton
engine engines * engines engines
WEBSTER PUMP / SERPENTINE BELT / CLUTCH - 6" dia.
    SIZE GALLONS PER MINUTE @ GIVEN RPM
Rated GPM cu. in. 625 675 750 875 1000 1250 1500 1750
17 1.94 6.4 7.0 7.7 9.0 10.3 12.9 15.5 18.0
12 1.55 5.1 5.6 6.2 7.2 8.2 10.3 12.4 14.4
9 1.16 3.9 4.2 4.6 5.4 6.2 7.7 9.2 10.8
7 1.04 3.5 3.7 4.1 4.8 5.5 6.9 8.3 9.7
5 0.77 2.6 2.8 3.1 3.6 4.1 5.1 6.1 7.2
4 0.58 1.9 2.1 2.3 2.7 3.1 3.9 4.6 5.4
PARKER TYPE AA PUMP / SERPENTINE BELT / HUB CLUTCH - 5" dia.
SIZE GALLONS PER MINUTE @ GIVEN RPM
cu. in. 625 675 750 875 1000 1250 1500 1750
0.73 2.8 3.0 3.4 3.9 4.5 5.6 6.8 7.9
0.68 2.6 2.8 3.2 3.7 4.2 5.2 6.3 7.3
0.61 2.4 2.5 2.8 3.3 3.8 4.7 5.7 6.6
0.49 1.9 2.0 2.3 2.7 3.0 3.8 4.5 5.3
0.43 1.7 1.8 2.0 2.3 2.7 3.3 4.0 4.6
  Typical RPM at Idle   
Cummins  Most  Most  Pre 2005  * 2005+ Tritons idle at 675 RPM
diesel diesel gasoline Ford Triton
engine engines engines engines
TYPE A PUMP / V-BELT / STANDARD CLUTCH - 7 1/8" dia.
    SIZE GALLONS PER MINUTE @ GIVEN RPM
Rated GPM   cu. in. 625 675 750 875 1000 1250 1500 1750
17 2.02 5.5 5.9 6.6 7.7 8.8 10.9 13.1 15.3
12 1.40 3.8 4.1 4.6 5.3 6.1 7.6 9.1 10.6
9 1.09 3.0 3.2 3.5 4.1 4.7 5.9 7.1 8.3
7 0.93 2.5 2.7 3.0 3.5 4.0 5.0 6.0 7.1
5 0.62 1.7 1.8 2.0 2.4 2.7 3.4 4.0 4.7
(1800 RPM)   Typical RPM at Idle  
Cummins  Most  Most  Pre 2005  * 2005+ Tritons idle at 675 RPM
diesel diesel gasoline Ford Triton
engine engines engines engines
TYPE A PUMP / V-BELT / HEAVY-DUTY CLUTCH - 6 7/8" dia.
    SIZE GALLONS PER MINUTE @ GIVEN RPM
Rated GPM       cu. in. 625 675 750 875 1000 1250 1500 1750
17 2.02 5.7 6.1 6.8 7.9 9.1 11.3 13.6 15.9
12 1.40 3.9 4.2 4.7 5.5 6.3 7.9 9.4 11.0
9 1.09 3.1 3.3 3.7 4.3 4.9 6.1 7.3 8.6
7 0.93 2.6 2.8 3.1 3.7 4.2 5.2 6.3 7.3
5 0.62 1.7 1.9 2.1 2.4 2.8 3.5 4.2 4.9
(1800 RPM)   Typical RPM at Idle  
Cummins  Most  Most  Pre 2005  * 2005+ Tritons idle at 675 RPM
diesel diesel gasoline Ford Triton
engine engines engines engines