F-1031, Section 4202
Page 5 of 10
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To disassemble the pump, perform the following:
1.
Disconnect the drain lines and similar connections to the pump and pump
transmission.
2.
Drain the lubricant from the pump transmission by removing the oil drain
plug.
3.
Disconnect the drive shafts from the pump transmission.
4.
Disconnect the intake and discharge piping from the pump.
NOTE: Unless the body and/or the front wear ring is damaged, it
may be easier to leave the piping connected and go to Step 6.
5.
Remove the pump and transmission.
6.
Remove the cap screws and copper washers, attaching the intake adapt
er to the body.
7.
Remove Intake and discard gasket.
8.
Remove the impeller shaft cotter pin and nut.
9.
Remove the impeller and square key.
NOTE: The impeller has three tapped holes in the eye to allow a
puller to be used to remove it.
10a.
Pumps with Mechanical Seals:
If the pump has a mechanical seal, re
move bolts, washers and nuts attaching pump head to the transmission.
Lubricate impeller shaft. The mechanical seal and pump head may now
be removed as a unit. NOTE that the rear wear ring will come off with
the head.
NOTE: Care must be taken not to damage the impeller shaft.
10b.
Pumps with Packing:
If the pump has packing, loosen unbalanced
nuts and remove the packing gland. Packing gland is split into two
halves for removal. The studs, unbalanced nuts and washers will re
main attached to the pump head.
Remove the caps screws, bolt and nut attaching the pump head to the
transmission.
Remove the pump head. NOTE that the rear wear ring will come off
with the head.
11. Remove flinger ring.
NOTE: Removing the impeller shaft from the pump transmission
is not necessary unless it is damaged. If the impeller shaft re
moval is necessary, see the pump transmission overhaul instruc
tions.
NOTE: Removing wear rings from the body or head is necessary
only if they are damaged or badly worn. (See impellers section of
inspection and repair).
Inspection and Repair
The following points cover inspection and repair of the major components
of CG Series pumps. Check all parts that are not covered in this instruc
tion in accordance with standard automotive shop practices. If the slightest
doubt exists about the actual condition of any part, replace the part as a
precautionary measure.
Mechanical Seal
If a pump has a mechanical seal, installing a new seal during reassembly is required.
Impellers
Check wear rings and impeller hubs for deep grooves or scratches. Care
fully measure the outside diameter of the impeller hubs and the inside di
ameter of the wear rings installed in the body and head. If the difference
between these two measurements exceeds 0.020 in., replace the wear
rings as directed below.
NOTE: Wear rings may be removed by crisscrossing two pry bars
under opposite sides of the wear ring. Pry up the wear ring by apply
ing equal pressure to both pry bars. The wear rings also have two
tapped holes in them to allow a puller to be used to remove them.
