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Wiggins Installation Information 3 |
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 Vent Installation
Half-couplings or floor flange couplings come with the vents. These
couplings are welded to or bolted to the tank after the appropriate
diameter hole has been cut. Then the vent assembly is simply screwed
into the half-coupling or floor flange as the case may be. A suitable,
fuel resistant thread lubricant should be used.
Receiver Installation
Three types of receivers have been developed to accommodate different
installations. Therefore, the tank preparation is different for each
one.
1. The external type receiver is simply screwed into a 2" half-coupling
that is welded to the tank, over the previously cut hole of appropriate
diameter.
2. The flush-mounted weld-on receiver is welded directly to the tank,
over the previously cut hole of appropriate diameter. Special welding
precautions must be taken to prevent overheating the receiver and
vulcanizing the O-ring seals. Unscrew nipple from flange while welding.
3. The flush-mounted bolt-on type receiver can be bolted directly to
the tank if the wall is thick enough for threading. Three perfect
threads minimum. The tank surface must be flat to make a good seal. Use
Permatex #3 on gasket and bolt threads. When the surface of the tank is
not flat enough or the tank wall is not thick enough, a doubler plate
with tapped blind holes is preferred. It provides a flat surface for
mounting and sealing, eliminates possible leakage through bolt threads
and allows positive number of threads for good attachment.
When receivers are used with saddle tanks, the cross over line must be
larger than the fill line. A 2" cross-over line is preferred, and is
required if the receiver is mounted in one of the tanks. Insufficient
flow from one tank to the other may effect premature shut off prior to
both tanks being full, with less than a 2" cross-over line. Each tank
must be fitted with a vent assembly.
IMPORTANT WELDING INSTRUCTIONS:
The ZNC4 is shipped with the ZN2A nipple installed only finger tight.
Before welding the ZNC4 Receiver Assembly to the tank, remove the ZN2A
nipple from the threaded flange to prevent transferred heat from
damaging rubber seals in ZN2A.
Installation Continued: 1 2 3 4
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