Section XIV. HYDRAULIC PUMP DRIVE GROUP
Compressed air used for cleaning and
drying purposes can create airborne
particles that may enter the eyes.
The hydraulic pump drive group is
Pressure shall not exceed 30 psig.
mounted to the engine front plate and is gear
Eye protect ion is required.
driven from the camshaft gear. It is util-
hydraulic pump drive group consists of a
shaft, a gear, bearings, a seal and gaskets.
The hydraulic pump drive group drives the
Do not spin dry bearings.
Clean all parts with an approved
cleaning solvent and air dry. Dry
p r e s s e d air.
a . Check bearings for freedom of rota-
hydraulic pump drive group by removing
tion. Replace a bearing if its rotation is
screws (1 and 4), nuts (2 and 5), lockwash-
ers (3 and 6) and gasket (7).
b. Inspect bearings for pits, scratches,
cracks or chipped races.
c . Inspect drive gear teeth for nicks,
hydraulic pump drive group in the order of
burrs, cracks and broken teeth. Nicks find
index numbers assigned. Pay particular
burrs that extend below the hardened surface
attention to the following:
of the gear teeth arc cause for rejection of
a. When removing adapter (14) note
position of drain hole to ensure correct
positioning during reassembly.
d. Inspect. drive gear teeth for wear
b. If necessary, remove gear (21) and
that may have destroyed the original tooth
bearing (22) from shaft (23) using a suitable
shape. If this condition is found, replace
a r b o r press.
c. Press bearing (20) out of adapter (24),
using a suitable arbor press.
c. Inspect adapters for cracks. Replace
8-103. CLEANING .
f. Inspect adapter mounting surface
Cleaning Solvents are flammable and
and shaft for nicks and burrs.
moderately toxic to skin, eyes and
respiratory tract. Eye and skin
g. Inspect threaded holes for threaded
protection required. Good general
ventilation is normally adequate.