Idex Hale Sam, Technical Manual

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105
F. Connect pneumatic tubing (1/4-in tubing) according to tags.
G. Restore truck air pressure to assembly and check for leaks.
H. Connect priming/drain tubing (3/4-in tubing) according to tags.
I. Install cable ties cut to R&R module as noted.
4.9.3 SAM Drain Valve Block Assembly
The SAM drain valve block mounts at the bottom rear of the gearbox (Figure 76) and requires flex
tube plumbing, truck compressed air, and harness connection. Truck compressed air is con-
trolled by the associated 4-way valve (see paragraph 4.11.4, page 126) to open or close the
drain. As with the primer port routing valves, refer to FSG-PL-01514 for all water and pneumatic
connections. The block also houses the connections for all the MIV and main pump air bleeds,
the water column sensor, and the 3/4-in flex pipe that routes priming water to the onboard water
tank.
Figure 76. SAM Drain Valve Block Assembly
The SAM drain valve block is comprised of a mounting bracket and a PF valve assembly. The PF
valve assembly houses an air cylinder, pressure transducer, muffler, a multiple-connection MIV
air bleed fitting, the water column fitting, and a to atmosphere fitting. Refer to the bench proce-
dure section (4.11, page 123) for info on each of these components.
If a component on the SAM drain valve block fails or is damaged; remove the SAM drain valve
block as follows.
Removal
A.
Note cable tie locations, cut all ties required to R&R entire SAM drain valve block
assembly.
B. Tag and disconnect electrical connectors.
THE SAM DRAIN VALVE BLOCK IS CONNECTED TO THE APPARATUS COMPRESSED AIR
SUPPLY VIA A 4-WAY AIR VALVE. DO NOT REMOVE A 4-WAY AIR VALVE, PF VALVE AIR
CYLINDER, FITTINGS, OR AIR TUBES WHEN THE SYSTEM IS PRESSURIZED.
C. Bleed off all compressed air pressure. See OEM/apparatus builder documenta-
tion/manuals for instructions.