18
THE OILGEAR COMPANY
Bulletin 947070-B
DISASSEMBLY (Continued)
Seek assistance from others and use of a
hoist and/or proper lifting techniques to
prevent personal injury.
Tag similar parts (particularly screws, plugs
and O-rings) during disassembly to make
sure they don't become confused with
similar parts and to ensure they will be
returned to their original location. Do not
remove (locator) roll pins unless they are
deformed or need to be replaced.
3. After removing the pump from the mounting
and before disassembly, cap or plug all ports
and clean the outside of unit thoroughly to
prevent dust from entering the system.
Depending on what part or parts are to be
inspected, it may not be necessary to
completely take apart all assemblies.
VALVE PLATE GROUP
If another pump is coupled with a thru-shaft pump
or other device coupled to the rear of the pump, it
will be necessary to remove that unit and O-ring
(59). If thru-shaft convertible cover (63) is used,
remove the socket head cap screws (64) and
O-ring (62). Also remove screw (61) and thru-shaft
coupling spacer (60).
Do not damage the faces of the port plate
and the matching faces of both the valve
plate and cylinder barrel.
1. Block the unit on bench with driveshaft
horizontal.
2. Remove valve plate assembly (45) by removing
four socket head cap screws (50 and 56) and
the valve plate assembly. When used, shaft
coupling (57) with retaining rings (58), if used,
will come with valve plate assembly. The port
plate (43) is located on the valve plate
assembly by a dowel pin. Remove the port
plate from the valve plate assembly.
The control sequence valve can be removed, if
necessary by:
(A) Removing the sequence valve spool plug
(51) with the O-ring (52).
(B) Withdrawing sequence valve spool spring
(53) and sequence valve spool (54).
The PC control cartridge (55) can also be
unscrewed from the valve plate if necessary. The
rear shaft bearing (67 or 77) is pressed into the
valve plate.
!
WARNING
NOTE
NOTE
CAUTION