Hale MG - Manual (Page 44)

Muscle Pumps
3-1
3. PREVENTATIVE
MAINTENANCE
A. Overview
Hale Midship Pumps require very little care and
maintenance. However, the little required is
extremely important. Preventive maintenance tasks
require very little time to accomplish and consist
mainly of testing for leaks, lubrication, and
cleaning.
The procedures supplied in this section are for
normal use and conditions. Extreme conditions
may indicate a need for increased maintenance.
The procedures in this section identify some
extreme conditions and the additional measures
needed to ensure lengthened pump life and
continuing dependability.
The first part of this section includes some extreme
condition maintenance guidelines. Sections with
recommended activities to be accomplished on a
weekly, a monthly, and an annual basis follow this.
A separate maintenance checklist is provided to
record completed maintenance actions.
B. Procedures
Post Operation Maintenance
1. If necessary, follow the procedures in the
Extreme Maintenance Conditions paragraph.
2. On two-stage pumps, remove the suction tube
strainers, and reach in to ensure that check
valves are free to swing. Also, verify that no
foreign matter is caught between the valve and
the seat.
3. Inspect the suction hose rubber washers and
washers in the suction tube caps. Remove
foreign matter from under these washers.
Replace worn, damaged, or dry washers.
4. Verify that all discharge valves, booster line
valves, drain valves, and cocks are closed.
5. Tighten suction caps.
Extreme Conditions Maintenance
Guidelines
Extreme conditions occur when the pump has been
operated during freezing weather and as a result of
pumping from a water source that contains
material that will be harmful to the pump if not
purged.
During Freezing Weather
In freezing weather, drain the pump as follows:
1. Open all discharge and suction valves, remove
suction tube caps, and discharge valve caps.
2. Open pump body drain cocks and/or Hale
multiple drain valve.
3. On two-stage pumps, move the transfer valve
back and forth to both the volume and the
pressure positions.
4. After the pump is completely drained, replace
all caps and close all valves.
After Pumping from Salt Water, Contaminated
Water, or With Foam Solution
After drafting from sea water, contaminated, sandy
or dirty water, flush the pump and suction hoses by
using water from a hydrant or other clean water
source. After pumping foam through the pump,
flush as above until all residues of foam have gone.
Weekly Maintenance
Weekly maintenance consists of testing the relief
valve system or governor, the transfer valve on
two-stage pumps, the priming system, and the
pump shift warning indicator lights. If testing
criteria is not met, refer to Section 4 for corrective
maintenance.