2.
Ascertain that the control lock is engaged.
3.
Check the cowl flap to visually determine that the flap is flush with the bottom of the engine cowl.
4.
If the flap is not flush, disconnect the push-pull control from the arm on the inboard side of the flap.
5.
Loosen the jam nut on the clevis end and adjust the clevis to get a flush fit between the cowl flap and engine cowl.
6.
Reconnect the control to the flap and operate the cowl flap through its full range a few times; then place the control in the closed position and visually check the flap to determine if it is flush with the engine cowl.
7.
If the cowl flap is not flush, repeat Steps 4 through 6.
8.
When the adjustment is completed, tighten the clevis jam nut and secure the push-pull control to the cowl flap.
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3G6
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3G8
MOUNTS.
ENGINE SHOCK MOUNTS.
INSTALLATION OF ENGINE SHOCK MOUNTS. (Refer to Figure 71-1.)
1.
Assemble the engine shock mounts on the engine mount as shown in Figure 71-1. Note the position of each mount carefully.
2.
Swing the engine into place, positioning the engine mounting lugs so they align with the engine mount attachment points.
3.
Position the shock mount bolts through the shock mounts and then through the mounting lugs and secure with nuts. Torque the nuts progressively, following a circular sequence until a torque value of 450-500 inch-pounds is reached.
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3G10
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AIR INTAKES.
INDUCTION SYSTEM. (Refer to Figure 71-4.)
Induction air is taken from the right rear engine baffle, routed through a short duct into the filter housing, and down to the carburetor through another duct and the carburetor air box. The filter housing, mounted to the firewall, is supported by connections to the two ducts and by a bracket to the engine mount structure. The carburetor air box is connected to the carburetor heat duct, which is additionally utilized as an alternate air source should the main inlet become blocked.
REMOVAL AND INSTALLATION OF AIR FILTER HOUSING.
1.
To make access to the assembly remove both the top and bottom cowlings.
2.
Remove the cover of the filter housing and withdraw the air filter.
3.
Loosen the clamps retaining the ducts to the filter housing and move them aside.
4.
Where the housing is mounted to the firewall make note of the amount and situation of the spacers,washers used. Remove the bolt and washers.
5.
With the housing upheld, remove the bolts from the housing support bracket that attach it to the engine mount.
6.
Install the unit in the reverse order.
INSPECTION, REMOVAL, AND INSTALLATION OF CARBURETOR AIR BOX.
1.
The carburetor and air box are at the rear of the engine under the dual magnetos. Access to the carburetor air box must be made with at least the bottom cowl removed. Disconnect the cable from the flutter valve arm.
2.
Loosen the clamps on the duct tubes and move them clear of the air box inlets.
3.
Remove the eight screws on the back of the box, and two on the top and bottom, aft of the valve shaft. These screws secure the back of the box which acts as a bearing support for the flapper valve.
4.
Remove the back of the air box and flapper valve assembly. Lubricate the shaft with lubriplate as necessary.
5.
Check the condition and operation of the flapper. Make sure the shaft moves freely in the bearings and the rivets retaining the bearings are in proper condition. Replace the rivets if the bearings exhibit any looseness, and make sure the bearings retain their proper alignment.
6.
Remove the safety wire and follow with the four bolts securing the assembly to the carburetor.
7.
With the assembly removed inspect the box for cracks and proper sealing.
8.
Reinstallation should be accomplished in the reverse order of removal. Once the assembly is installed make sure the flapper valve moves freely before installing control cable.
REMOVAL AND INSTALLATION OF CARBURETOR HEAT SHROUD.
1.
Remove the bottom cowl.
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