Repair Procedures BPU 2440/2950 Repair
wc_tx000329gb.fm 40
5.11 Re-assembling the Exciter
Refer to Cross Section Component List for item numbers ( ).
See graphics: wc_gr001446 and wc_gr001447
When installing shafts, make sure drive shaft is installed on machined
end of housing. Later housings are symmetrical and are machined at
all four bearing locations. On these housings, the drive shaft may be
installed on either side.
Installing idler shaft
5.11.1 Assemble retaining ring (19), key (22), gear (20), and bearing races
onto shaft.
5.11.2 Press roller bearing into one side of exciter housing. Use a flange
cover as a guide in positioning the bearing the correct distance into the
housing.
5.11.3 Install the idler shaft. Complete the installation by pressing the
remaining bearing into the opposite side of housing. Position the
bearing into the housing using a flange cover.
Installing drive shaft
5.11.4 Using the wooden V-block to secure shaft, position the piston
assembly (14) in shaft and press guide pin (11) through.
Caution: Do not hammer on guide pin. Hammering may mushroom
top of pin and cause it to bind in the sleeve gear.
Note:
When installing guide pin, make sure it extends an equal
distance on each side of shaft so it will slide freely once sleeve gear is
installed.
5.11.5 Press sleeve gear bearing (12a) on shaft and secure in place with
retaining ring (10).
5.11.6 Press bearing race on pulley side of shaft. Do not install bearing race
on opposite side of shaft until shaft and sleeve gear are in place.
5.11.7 Insert drive shaft assembly through housing and slide sleeve gear (12)
on shaft and over sleeve gear (12a).
Note:
Sleeve gear must be installed so that when the piston assembly
is pulled out, the bolt holes in the shaft face the timing mark on the
gear.
5.11.8 Press bearing into pulley side of exciter housing. Position it in the
housing using a flanged cover.
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