Komatsu 830E-AC Shop Manual page 798

FIGURE 2-3. NOZZLES AND BLOW-OFF CAP
6. Inspect lines, fittings and nozzles for mechani-
cal damage and cuts.
7. Check nozzle openings. The openings should
be packed with silicone grease or equipped with
plastic blow-off caps if equipped with nozzles as
shown in Figure 2-2. Nozzles of the type shown
in Figure 2-3 are not to be packed with grease.
Only the protective caps shown are to be used
on this type of nozzle.
8. Remove and inspect the cartridge of the remote
actuators. Replace if ruptured. Check operation
of puncture pin.
9. Replace any broken or missing lead and wire
seals.
Recharging Procedures
After actuating the fire control system, the system
should be recharged. Follow the procedure below for
each dry chemical tank and actuator installed:
1. Relieve the pressure from the lines by pulling
the ring on the safety relief valve.
2. Disconnect line from tank actuator and remove
line from the bursting disc union.
M2-4
3. Remove each extinguisher from its bracket.
4. Disassemble bursting disc union and replace
the ruptured bursting disc with flat side toward
extinguisher.
5. Fill tank with dry chemical to not more than
three inches (76 mm) from the bottom of the fill
opening.
6. Inspect fill opening threads and gasket. If nec-
essary clean threads.
7. Install the fill cap and tighten the cap hand tight.
8. Remove the cartridge guard from the dry chem-
ical tank and remove the cartridge.
9. Insure that the cartridge puncture pin is fully
retracted.
10. Weigh the new cartridge. The weight must be
within 0.25 ounce (7.0 grams) of the weight
stamped on the cartridge.
11. Screw the new cartridge onto the actuator
assembly, hand tight.
12. Replace the cartridge guard and install the dry
chemical tank into its bracket.
13. Connect line at the bursting union, and line at
the tank actuator.
14. Remove the cartridge guard from the remote
actuators and replace the cartridges.
15. Replace the cartridge guards, and install ring
pins on the push buttons.
16. Inspect hose, fittings and nozzles for mechani-
cal damage. Replace all hose that has been
exposed to fire areas.
17. Clean the nozzles and repack the openings with
silicone grease or install blow-off caps. Use
caps for the new designed nozzles shown in
Figures 2-2 and 2-3
Fire Control Systems M02005