DISASSEMBLE CENTER HOUSING
(SHEET 13 OF 19)
Using fingers, install 5/16-18 x 1-1/2 inch bolt (8) two
or three turns into one pitot tube (9).
Pull tube (9) out of center housing (2).
Remove preformed packings (10, 11) from tube (9).
Repeat steps 8, 9 and 10 for other tube (9), then go to
Using two screwdrivers, remove retaining ring (12)
that retains clutch disk (third clutch backing plate)
Using two pry bars, gently wiggle backing plate (13) to
loosen it. Remove backing plate (13).
Remove pin (14) which was freed when plate (13) was
When removing, handling, or installing clutch packs, keep all clutch disks and
plates in the same order and facing the same way. Under heat and pressure,
clutch plates can take on a conical shape, called coning. Each plate will differ
in degree of coning. When coned plates are mixed or turned over, they cannot
seat properly against each other. This can prevent plates from making
adequate surface contact with each other for the clutch pack to operate
When one clutch disk or plate needs to be replaced, replace the entire clutch
pack Individual clutch plates should not be replaced, because such new plates
will not have the surface contour of adjoining older plates, decreasing
effectiveness of the clutch pack
Clutch assemblies function in pairs. When one clutch pack fails, a second
clutch pack will often be defective.
Failure of one clutch pack requires
inspection of all clutch assemblies in the range pack.
Go to Sheet 14
Para. 4-28, Task 6