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a. The first position is for 76-81 inch truck panel widths. The extension is pushed on
until the first hole in the extension lines up with the hole in the gearbox hand-
wheel shaft.
b. The second position is for 70-76 inch truck panel widths. The extension is pushed
on all the way until the second hole in the extension lines up with the hole in the
gearbox handwheel shaft.
c. Two groove pins are provided in the installation kit. On 76-81 inch panel widths
both groove pins are used. While on 70-76 inch panel widths only one pin is
used.
5.
Once pump operator panel is closed install valve handwheel for manual operator.
KEEP HANDS AND ARMS CLEAR OF THE VALVE DISC WHEN VALVE IS BEING OPERATED
WITHOUT SUCTION TUBE STRAINER OR SUCTION TUBE IN PLACE.
6.
Lubricate the valve bore and disc edges using Super Lube® Multi-Purpose Synthetic
Grease Food Grade with Silicone or equal. Cycle the valve to check for smooth operation.
7.
Hydrostatically test the fire pump and valve in accordance with accepted procedures.
2.2.8 Relief Valve Adjustment
NEVER SET INTAKE RELIEF VALVE ABOVE HOSE MANUFACTURERS RATED PRESSURE.
ALWAYS USE THE LOWEST POSSIBLE RELIEF VALVE SETTING TO ENHANCE OPERATOR
AND EQUIPMENT SAFETY.
PER NFPA 1962 REQUIREMENTS, LARGE DIAMETER HOSE MARKED “SUPPLY HOSE”
SHALL NOT BE USED AT OPERATING PRESSURES EXCEEDING 185 PSI (13 BAR).
The relief valve is factory set to open at 125 PSI (9 BAR). Refer to manufacturers relieve valve
instructions when adjusting. The Hale relief valve can be adjusted to open from 75 to 215 PSI (5
to 15 BAR). Test and set relief valve as necessary using the following procedures and figure 5:
1.
Open operator panel and gain access to the relieve valve adjustment screw (See Figure 5)
2.
Make sure MIV is closed and install a pressure test cap on the suction tube.
3.
Connect a pressurized water source or hydrostatic test pump and water supply to the pres-
sure test cap fitting.
4.
Open water supply valve and air bleed valve. Fill suction tube until water flows from air
bleed. Close air bleed.
5.
Pressurize to desired set pressure in accordance with the above warnings. Observe
whether relief valves open or remains closed at the desired pressure.
6.
Turn off water source and relieve pressure through the air bleeder allowing relief valve to
reset.
7.
Release locking nut one turn.
8.
Zero adjusting shaft by backing it out (counterclockwise) until it stops, then turning it back
(clockwise) to increase relief pressure.
9.
Consult Table 1 for the adjustment setting for the desired opening pressure.
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