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 TM 55-1905-217-34
(27) Attach the blower drive shaft cover (5) to the blower rear end plate cover (24) with cover seal (29)
and seal clamp.
f. Installation. Before attaching the blower to the engine, check the inside of blower for any foreign
material and revolve rotors by hand to be sure they turn freely.
(1) Affix a new blower to block gasket to the cylinder block with a non-hardening gasket sealant on the
block side only.
(2) Place a new drive shaft cover seal (29, fig. 3-35) and seal clamp over the end of the drive shaft
cover (5).
(3) Place the water pump outlet packing flange, flat face toward pump body, and slide a new packing
ring over the pump outlet. Then, place a new water pump cover seal and clamp on top of the oil cooler housing
outlet opening.
(4) Place the blower assembly into position against the cylinder block, being careful not to dislodge the
blower gasket.
(5) Install the eight blower to cylinder block bolts and plain washers, and tighten bolts to 55-60 lb-ft
(6) Slide the blower drive shaft cover seal (29) into position against the blower drive gear hub support
and tighten the seal clamp.
(7) Install the blower drive shaft (4) by pushing the plain end, without squared hole, of the shaft through
the blower drive coupling from the rear of the engine, then into the blower drive gear hub. If necessary, rotate
the blower rotors slightly to aline the splines of the drive shaft with those in the gear hub. Then, install the lock
ring in the blower drive cam.
(8) Install the flywheel housing small hole cover.
3-10. Transmission Control Valve
a. Removal.
(1) The transmission control valve is mounted on the reduction gear housing at the rear of the engine.
(2) Disconnect operating linkage from transmission control valve.
(3) Disconnect oil supply hoses from control valve.
(4) Remove the bolts and lockwashers securing each oil tube assembly to the reverse gear housings.
(5) Remove the four bolts and copper washers securing the oil tube assembly to the top of the control
valve. Remove oil tube assemblies and gaskets.
(6) Remove the four bolts, lockwashers, and plain washers securing the control valve assembly to the
reduction gear housing cover. Then lift the control valve assembly from the reduction gear housing cover.
b. Disassembly.
(1) Remove the locating screws (20, fig. 3-36) (one for each shutoff valve) and copper washer from the sides
of the control valve housing.
3-51
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