Hale Q Series Muscle - Manual (Page 197)

197 MUSCLE (Midship) Pumps Installation, Operation, and Maintenance Manual
p/n: 029-0020-63-0
Cavitation 
 Follow the maintenance and inspection procedures.
 Cavitation can also occur when air enters the pump. The pump could be primed;
however, air leaks can cause rough operation and an increase of engine speed
without an increase in pressure or flow. If an air leak is suspected, refer to Section
6 “Troubleshooting” on page 93.
 Using “soft sleeve” vs. “hard sleeve.” The soft sleeve has an advantage as the
sleeve collapses under a partial vacuum (visual indication of cavitation), even
though the intake gauge might still indicate a positive pressure. With a hard
sleeve, the only indicator would be the intake gauge, which is inaccurate at close
to the ZERO (0) reading.
Strainers
Clogged strainers or suction strainer selection, restricting flow. Verify the hose strain-
ers and suction strainer are clear (unobstructed) and located deep enough in the
water source to insure constant, uninterrupted water flow.
Note: Strainer type, basket vs. barrel, also has an affect on water flow which can contribute
to flow restrictions, thus causing cavitation and reduced pump performance, especially dur-
ing high drafting conditions. Basket strainers are preferred by Hale due to their overall suc-
tion and straining area.
Turbulence or whirlpools in the hose line can be caused by excessive operating pres-
sures from the intake source. Carefully monitor and reduce pressures as needed.
2,250 (9,000) 4.3 (1.3) 2.0 (0.6)
2,500 (10,000) 5.2 (1.6) 2.3 (0.7)
Table G-4: Hose Size vs. Pump Rating Capacity (Sheet 2 of 2)
Hose Diameter
in. (mm)
3”
(75)
4”
(100)
4.5”
(110)
5”
(125)
6”
(150)
Dual
6” (150)
Triple
6” (150)
Flow - gpm (lpm) Lift Loss gpm (lpm)