Installation of Fording Intake Stack

We obtained a complete fording intake stack from Alan Post. By complete, we mean the stack extension 2510-01-198-0333 [2510011980333], the clamps 5340-00-079-7837 [5340000797837], the vent tube 4710-01-209-6746 [4710012096746], and the windshield mount bracket 5340-01-238-9543 [5340012389543] with fasteners.

As you may notice, the rubber extends a little higher than normal at the base of the stack. We had ordered several 4 1/2″ silicone 90°s, to see how they would work. As it turns out, the actual AM General part is slightly less than 90°. Use of the silicone 90° required cutting the end that connects to the air cleaner at a slight “off-angle,” as did the portion that connects to the stack. We have instead ordered the correct fitting to replace this, however use of the silicone 90° would definitely be adequate and completely serviceable.

Photo: Coolant Return Tube from Heater Core to Water Pump

Picture from M998

UPDATE 1/5/2019: We have identified the NSN of this tube. For our application (an early, low serial number HMMWV), the correct NSN is 4720-01-473-2352 [4720014732352]. The manufacturer number (does not appear to be an AM General number) is RCSK18121.

Later models (SERIAL NUMBER 196901 AND ABOVE) use a different tube, 4710-01-488-6076 [4710014886076], which carries AM General P/N 4710014886076.

Currently using heater hose on this location and trying to locate either NSN or part number for this tubing.

Photo: Front Axle Vent Line to Tee at Fuel Pump

Above images show Figure 141, Item G which is the Tee where the front axle vent connects to the fuel pump and the vent line leading from the rear axle, transmission and transfer case.

This Tee consists of TEE, PIPE TO HOSE 4730-01-192-8086 [4730011928086] and a pipe to hose adapter, 4730-01-004-8346 [4730010048346]. Hose “3” in the picture goes to the upper connection on the fuel pump where fuel will leak into the venting system if the diaphragm fails.

As shown in the picture below, the tee is mounted by clamp 5340-00-067-3868 [5340000673868] (MS21333-109) which is a 1/4″ I.D. clamp with a 1/4″ attachment hole. It mounts to the RH side splash guard 2540-01-174-7696 [2540011747696]. (We believe this clamp has been used as a substitute for the spring tension clamp View “H” 5340-01-187-0892 [5340011870892])

Picture from M998