Section XIII. HYDRAULIC PUMP (PRECISE SETS ONLY)
The hydraulic pump is mounted to
the hydraulic pump drive group and is
driven through the camshaft gear. The
hydraulic pump is used on precise genera-
tor sets only. The hydraulic pump is a
b. When removing pump assembly (8)
positive displacement gear type pump with
from pump drive, hold hand under adapter
a built in adjustable relief valve. The pump
flange on pump drive to catch coupling
is coupled to the pump drive group by means
shaft (6) when it drops out.
of a tang type drive coupling. The pump
consists of a shaft, dual gears, sleeve
bearing and seal.
Cleaning Solvents are flammable and
moderately toxic to skin, eyes and
8 - 9 4 . REMOVAL.
respiratory tract. Eye and skin
protection required. Good general
ventilation is normally adequate.
hydraulic pump in the order of index numb-
e r s assigned. Pay particular attention to
Wash pump assembly in an approved
a. Disconnect hose assemblies (1 and 2)
solvent to remove grease, and hydraulic
from pump suction and discharge ports, and
fluid residue. Dry with a lint free cloth.
plug hose assemblies to prevent fluid spil-
a. Check pump shaft for freedom of
b. Inspect coupling shaft (6) for nicks
and burrs on tang end.
c. Inspect condition of threaded holes
in suction and discharge ports.
d. Discard gasket.
Do not use a grinding wheel on
coupling shaft tang.
Figure 8-23. Hydraulic pump, exploded
view (precise sets only)
a. Remove nicks and burrs on drive
tang of coupling shaft using a suitable
1. Hose assembly (suction)
2. Hose assembly (discharge)