OM-05845
GHC SERIES
PAGE E-6
MAINTENANCE AND REPAIR
bled.
Pressure Relief Valve (10)
The pressure relief valve (10A) can be mounted on
either the head assembly (01A, see Figure 1) or the
housing assembly (04, see Figure 2)). Take note as
to the direction in which the relief valve is mounted.
To remove either style, remove the capscrews (B)
securing the relief valve to the pump. The O‐rings
(10C) may remain in the head (01A) or in the hous
ing (04A). Remove and discard the O‐rings. For re
lief valve maintenance, see
RELIEF VALVE DIS
ASSEMBLY
followed by
RELIEF VALVE RESAS
SEMBLY
at the end of this section.
Rotor Adjusting Sleeve (07)
(Figures E‐1 and E‐2)
Before attempting to remove the bearing lock nut
(03C), loosen the socket head setscrews (GA) se
curing the rotor adjusting sleeve (07AA) and use a
pipe wrench to turn the rotor adjusting sleeve
clockwise (as viewed from the drive end) until the
rotor binds against the head. This will prevent the
rotor from turning as the locknut is unscrewed.
Straighten the tab on the bearing lockwasher (03B)
and use a hammer and drift pin (or special tool
48731-027 available from Gorman‐Rupp) to loos
en the bearing lock nut until it can be unscrewed
from the shaft. Remove the bearing lockwasher.
Unscrew the rotor adjusting sleeve kit from the
backhead.
NOTE
Part or all of the seal assembly (5) will be removed
with the rotor adjusting sleeve. Check the
Parts List
furnished with your pump to identify the seal, refer
to
Seal Appendix
,
Section F
for removal of the seal
and related components, then proceed as follows
with rotor adjusting sleeve disassembly.
When removing or installing the bearing
(07AC), never hit or press against the inner
race. Press
only
against the outer race.
Figure E‐2. Rotor Adjusting Sleeve w/Bearing
Retaining Nut
Secure the rotor adjusting sleeve (07AA) in a vice
with the drive side up. Use a suitable spanner
wrence (or special tool 48731-028 available from
Gorman‐Rupp) to unscrew the bearing retaining
nut (07AD) from the rotor adjusting sleeve. The
bearing (07AC) is a light press fit into the rotor ad
justing sleeve and can usually be removed with
thumb pressure only. If the bearing does not come
out easily, use a suitably sized sleeve and a mallet
to lightly tap the bearing from the bore.
Refer to
Cleaning and Inspection
in this section
before reassembling the rotor adjusting sleeve.
Head/Idler Kit
(Figures E‐1 and E‐3)
Remove the hardware (B) and separate the head
(01A) from the housing (04A). Remove and discard
the gasket (01B).
01A
01AA
01B
01AB
02A
02B
B
Figure E‐3. Head Kit And Idler Disassembly
