Hale MG - Manual (Page 46)

Muscle Pumps
3-3
2. Verify that the warning indicators in the cab and
the pump control panel are on.
3. Switch to non-pumping operations, and verify
the warning indicators are off.
Valve Lubrication
1. Spray all moving parts of the suction, discharge,
hose drain, and multi drain valves with a good
grade of lithium base grease.
2. Lubricate all of the valve linkages.
Monthly Maintenance
Monthly maintenance includes the Weekly
Maintenance procedures plus lubrication, the packing
gland adjustment, dry vacuum testing, and checking
the drive line bolts. The Weekly Maintenance
includes testing the relie f valve system or governor,
the transfer valve on two-stage pumps, the priming
system, and pump shift warning indicator lights.
Suction Check Valve Testing
On two-stage pumps remove the suction tube
strainers, and reach inside the pump to ensure that
the check valves are free to swing. Also, verify that
no foreign matter is caught between the valve and
the seat.
Lubrication
1. On handwheel-type valves, including PM, PMD,
and Transfer Valve Controls, if necessary, first
remove old grease and paint, use a dry
lubricating spray on gears.
2. Remove the gearbox oil fill plug (refer to the
Hale Service Chart), and check the level of the
oil in the gearbox. The level should be up to the
plug hole. If necessary, add oil, using only a
good grade of SAE EP 90 (oil should meet GL-5
requirements).
3. Lubricate suction threads with a light coat of
grease.
Packing Gland Adjustment
The packing gland is adjusted for a leakage of
about 8 to 10 drops per minute at 150 PSI (10
BAR). This slight leakage will lubricate and cool
the shaft and packing to prevent burning and
scoring the shaft. First, check the leakage rate, and
adjust the packing gland only if necessary. If the
leakage rate cannot be adjusted within satisfactory
limits, replace the packing per the instructions
under Repacking in this section, page 3-6. Packing
should be replaced every three years. The packing
gland is adjusted as follows.
1. Connect the pump to a hydrant or some other
source of water of about 150 pounds of
pressure. If this is not possible, operate the
pump at about 150 pounds from draft or from
the booster tank discharging through the
booster line, another small nozzle, or
circulating back to the tank. Count the drops
per minute.
2. Shut down engine to make adjustments.
DO NOT RUN ENGINE WHILE MAKING
PACKING ADJUSTMENTS.
3. Loosen the packing nut lock. The lock is either
a spring-loaded pin or a screw and locknut.
The end of the lock fits into a slot in the gland.
4. To loosen or tighten the packing gland:
a. Insert a screwdriver or rod into one of the
slots. Refer to the Hale Service Chart.
b. To loosen the nut, turn it in the direction
of engine rotation.
c. To tighten the nut, turn it in the direction
that is opposite to engine rotation.
5. Repeat step 1 and verify that leakage is correct.
Tighten for less leakage, loosen for more
leakage.