OM--05450
GHS SERIES
PAGE E--6
MAINTENANCE AND REPAIR
01A
01AA
01B
01AB
02A
02B
P
K
B
11AA
P
10C
Figure E-3. Head Coverplate Kit, Head Kit
And Idler Disassembly
Remove the hardware (B and K) securing the cov-
erplate (11AA) to the head (01AA) or housing
(04A). The O-rings (10C) may remain in the head or
housing. Remove and discard the O-rings.
Head/Idler Kit (01 and 02)
(Figure E-1 And E-3)
Remove the hardware (B) securing the head as-
sembly (01A) to the housing (04A). Separate the
head jacket from the head assembly. Remove and
discard the gasket (01B).
Use caution to prevent the idler assembly
from dropping off the idler pin; the idler
may be damaged if it falls on a hard sur-
face.
Pull the head assembly (01A) from the housing as-
sembly (04A). Use caution not to let the idler as-
sembly (02) slide off the idler pin (01AB).
Use caution when handling the idler (02)
and the rotor shaft assembly (03A). These
parts have sharp edges which will grow
sharper with use.
NOTE
The idler bushing (02B) may be damaged during
removal. Do not remove the idler bushing unless re-
placement is required.
Remove the assembled idler (02) from the head as-
sembly. Inspect the idler bushing (02B) for exces-
sive wear or scoring. If replacement is required,
use an arbor (or hydraulic) press to remove the
idler bushing from the idler.
To remove the idler pin (01AB), lay the head as-
sembly (01A) on an arbor (or hydraulic) press with
the idler pin facing down and press the idler pin
from the head.
Seal Removal (05)
The seal assembly (05) is available in a variety of
configurations. Check the
Parts List
furnished with
your pump to identify the seal, then refer to
Seal
Appendix
,
Section F
, for removal of the seal and
related components.
Rotor/Shaft Removal (03)
With the seal removed, slide the rotor/shaft assem-
bly (03A) out of the housing (04A). Due to close
machine tolerances and assembly practices, the
rotor/shaft is available only as an assembly. Further
disassembly is not required.
Foot Bracket Kit (08)
Remove the hardware (B and D) securing the foot
bracket (08A) to the head (01A) and the backhead
(06A).
Backhead Kit Removal (06)
(Figures E-1 and E-4)
Remove the screws (B) securing the backhead
(06A) to the housing assembly (04), and separate
the assemblies. Remove and discard the gasket
(06B).
NOTE
The throttle bushing (06AE) may be damaged dur-
ing removal. Do not remove the throttle bushing un-
less replacement is required.