Hale MG - Manual (Page 48)

Muscle Pumps
3-5
f. Test apparatus and check for leaks around
strainer fittings
3. Place apparatus back in service.
Indicator Light Test
1. Operate component with indicator lights and
observe the respective indicator lights. If the
indicator light fails to light replace the bulb and
test again.
Annual Maintenance
Annual maintenance consists of post-operation,
weekly, and monthly maintenance. Maintenance
for extreme conditions may also apply. In addition,
the annual maintenance includes the following
tasks.
•
Gauge calibration check.
•
Autolube® assembly oil level check: fill or
replace with SAE EP 90 or 80W90 weight oil.
•
Lubricating the power transfer cylinder, power
shift cylinder, and shift control valve with air
cylinder oil.
•
Replacing the pump gearbox oil: use SAE EP
90 or 80W90 weight oil (GL-5 equivalent).
•
Checking individual drain lines from the pump
to the multi-drain to ensure proper drainage
and protection from freezing.
•
Running the yearly pump test to check
performance levels. (See NFPA 1911 pamphlet
for more details).
•
Repacking the pump at three-year intervals.
Performance Testing Overview
The yearly standard performance test consists of
checking the pumper, according to rating, at three
capacities and comparing the results to when the
pump was new. This provides some measure of
performance deterioration, if any. For performance
testing criteria refer to the latest version of NFPA
1911 pamphlet. Pumpers are rated at capacities of
500, 750, 1000, 1250, 1500, 1750, 2000, or 2250
GPM (1892, 2839, 3785, 4731, 5678, 6624, 7570,
or 8516 LPM). See Table 3-1.
Performance Testing Equipment and
Materials
To accurately test pumper performance, you will
require a pitot gauge, a pump master pressure
gauge, and a master vacuum gauge or manometer.
ALL gauges must be carefully tested for accuracy.
Gauge testing is appropriately accomplished with a
dead weight gauge tester, which is usually
available at the local water works.
Pumpers should be tested from draft at not over a
10-foot lift with 20 feet of suction hose. Pumpers
rated at 1500 GPM and over often require two
separate 20-foot lengths of suction hose and a
lower lift height.
Use smooth bore test nozzles of accurate size with
the pitot gauge. The volume pumped is then
determined by reference to discharge tables for
smooth nozzles. Refer to Table 3-2 for Nozzle
Flow Rates. Preferably, nozzles will be used on a
Siamese deluge gun for greatest accuracy. A
stream straightener, just upstream of the nozzle is
advisable.
The amount of discharge hoses required for the
service tests is dependent on the flow requirements
and capacity test point. The most common
discharge hose used is 2-1/2 inches in diameter 100
feet long. The number of hoses and length should
be sufficient to reduce nozzle pressure to between
30 and 85 PSIG (2 and 6 BAR). In general refer to
the hose friction loss chart in Table 3-3 for a
determination as to the friction loss in 100 feet of
hose. Refer to Table 3-4 for suggested nozzle sizes
for service testing of common size pumps.