OP-755 Part 2 Pages 197-401 - Personal Page of GENE SLOVER

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have been fitted individually over the dowel pins 196732-8.
If a new solenoid is to be installed the solenoid case 274279-1
is to be removed by first loosening the clamp bolts 196780-4
in the solenoid operating levers 274273-3 and 274273 (see
274272 valve block), then remove the levers. Next remove the
14 solenoid housing mounting screws 196780-4 and the case
274279-1 can be removed. Next remove the 196826-9 pipe plugs
located on the back of the solenoid cases, and drive out the
dowel pins 196732-8. The solenoid is to be mounted in place
and secured with its mounting screws. Nowuse a 19/64 inch
drill and with the dowel holes as a guide drill thru the solenoid
mounting flanges. Care must be taken not to drill too
deep and injure the solenoid coils. Ream the holes for the
5/16 inch dowel pins 196732-8, and assemble the pins and the
pipe plugs 196826-9. Remove the solenoid and reassemble the
case 274279-1 to the val.ve block cover 274275-1. Reassemble
the solenoid operating levers, and both solenoids. Connect
the terminal wires and then replace the cover.
113. To remove the air breather assembly (dr . no. 274286-2),
Grab the lower hexagonal portion of the breather assembly with
a wrench and screw the breather assembly out of the elbow
206447-4·
To dismant l e the air breather. - Grab one of the hexagonal
portions of the breather in a vise, and screw
off the other cover with a wrench. Take precautions
against losing the small needle valve when dismantling
the assembly.
114. To remove the control pump gear case assembly. -
(Refer dr. no. 274247.) First disconnect the tubing from the
#7 flange connections and disconnect and remove the coupling
between the electric motor and the A-end shaft. Remove the
14 screws 206829-5 and then insert three 3/8!l-16 jack screws
in the 1/2 inch drilled holes and remove the assembly by turning
the jack screws evenly. Care must be taken not to injure
the oil seal 274338-7.
115. To dismantle the control pump gear case assembly. -
After the assembly has been removed from the A-end remove the
two screws 180226-6 remaining in the cover 274295-1. Insert
jack screws in the three 3/8"-16 tapped holes in the cover
274295-1, and remove the cover by turning the jack screw evenly
until the cover slides off the dowel pins. The gear 274298-1
can nowbe lifted out of the case. 274296-1 and the gear 274298-5
can be removed from the drive shaft 274300-1.
116. To reassemble the control pump gear case assembly. -
Wash all parts in a non-acid cleaning solution. The assembled
gear case can be reassembled to the A-end, however for ease