27
08
Repair Instructions
Manual 1843 Rev B p/n 001843 0000
120%
120%
GUIDE
GUIDE
GUIDE
ASSEMBLY PROCEDURE
ASSEMBLY
CAP
SCREW
LIFT
STOP
LIFT
SPACER
SPRING
DISC
SEAT
ASSEMBLE
CONCAVITY
FACING
‘SEAT’
APPLY ‘LOCTITE 515’ TO THREAD OF SEAT.
AREA UNDER DISC TO REMAIN CLEAN
3RD
PAIR
2ND
PAIR
1ST
PAIR
NOTE: Individual components are not sold
separately; discharge valves are sold as an
assembly only.
Figure 8-1 – Discharge Valve
To inspect the discharge valves, proceed as
follows:
1. Drain oil from the pump and remove the
separator housing cover.
2. Unscrew the air/oil separator from the top of
the valve deck cover.
3. Remove the capscrews from the valve deck
cover and remove the cover.
4. The valve chamber will contain a quantity of oil.
Drain the chamber by removing the pipe plug
on the closed head end of the cylinder. As an
alternative, scoop the oil out of the valve cavity
with a small container. Remove capscrews in
valve hold-down plates and lift out valve plates
with valves.
5. Inspect the valves by snapping the valve disk
or lower valve spring away from the valve seat
to check for spring tension and mechanical
defects. Inspect the sealing surfaces for dirt
or other foreign material. Check that the disk
or lower valve spring has not warped (dish
shape) as they must be flat for full contact. If
a more careful inspection is required, remove
the capscrew(s) holding the valve together.
When reassembling the valve, replace valve
components in exactly the same position
as before.
See Figure 8-1
for assembly
instructions.
6. Reinstall the valves in the pump.
Caution must be used to ensure no screws
or objects enter the piston chamber. It is
recommended to replace the locking screws
with new lock screws when re-installing the
valves and plates.
SHAFT SEAL ASSEMBLY
Under normal conditions, the shaft seal (
see
Figure 8-2
and
Figure 8-3
) has a long, trouble-
free life. It may become worn or scratched on
the sealing face by dirty sealing oil, which also
lubricates the shaft seal, or it may be damaged by
excessive heat due to poor lubrication.
SHAFT SEAL AND
BEARING HOUSING
MECHANICAL
SHAFT SEAL
BEARING
BACK-UP RING
BALL
BEARING
SEAL
BACK-UP RING
MATING RING
LOCKNUT
DRAIN PLUG
Figure 8-2 – KT-150 Shaft Seal and Bearing Housing