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 TM 10-3930-242-34
( 2 ) Remove and disassemble t h e h y d r a u l i c
hoses and manifold (fig. 6-15).
a. General. The hydraulic manifold is located
to the right side of driver under the console
c. Cleaning and Inspection.
panel. The purpose of the manifold is to distri-
( 1 ) Clean all metal parts thoroughly, using
b u t e hydraulic oil to the various pumps on the
s o l v e n t P-D-680, or equal.
machine.
(2) Wipe hoses clean.
NOTE
( 3 ) Inspect the manifold for cracks, distor-
Because of an engineering change, the manifold (1,
t i o n , broken welds and other damage.
( 4 ) Inspect hoses for abrasion, cracks, and
a n d various hoses and connections are no longer
other damage.
u s e d on forklift trucks after Anthony Serial No.
L T 1 - 6 8 8 (Army Model 200), Chrysler Serial No.
( 5 ) Inspect clamps and mounting hardware
CC0789 (Army Model 202), and all Athey forklift
f o r damage.
trucks (Army Model 222). Instead, the various
( 6 ) Replace all defective parts,
pumps are individually fed from the hydraulic oil
r e s e r v o i r . The information in this paragraph ap-
d. Reassembly and Installation.
plies to the specified equipment and should be ac-
(1) Assemble and install the hydraulic
cepted on an "as applicable" basis.
hoses and manifold (fig. 6-15).
b. Removal and Disassembly.
(2) Fill the hydraulic oil reservoir. Refer to
(1) Drain the hydraulic oil reservoir (para
t h e lubrication order.
Section II. MAIN HYDRAULIC PUMP AND ENGINE DRIVEN PUMP
6-14. General
(5) Inspect all other parts for wear and
other damage.
a. The main hydraulic pump is driven by the
(6) Replace all seals, packing, and defective
t r a n s m i s s i o n where it has available considera-
parts during reassembly.
b l e torque, a requirement of this pump. It is
a c t u a l l y two separate pumps that are assem-
s e m b l e the main hydraulic pump.
b l e d into a single unit and driven by a single
shaft that is common to both pump sections. It is
NOTE
d r i v e n at engine speed by the transmission.
After reassembly, run the pump for 30 minutes at
b. The engine driven pump is of the single-
2000 rpm while pumping SAE No. 10 oil at 0 psi
pressure.
u n i t - t y p e . It is coupled to the engine balance
Test. Bench test the pump by driving it at
f.
shaft where it turns at engine speed at all times.
2 8 0 0 rpm while loading the pump to 1600 psi.
6-15. Main Hydraulic Pump
Pump capacity is 30 gallons per minute.
g. Installation. Install the main hydraulic
a. G e n e r a l . T h e m a i n h y d r a u l i c p u m p i s a
pump (TM 10-3930-242-12).
dual pump. The longer portion of the pump sup-
plies hydraulic pressure to the lift cylinders and
NOTE
t o the extension cylinders. The front or smaller
Pressure setting is on the hydraulic 3-spool valve.
p o r t i o n of the pump supplies pressure for front
Check pressure at the pump, 2000-2100 psi.
w h e e l steering.
6-16. Engine Driven Pump
b. Removal. R e m o v e t h e m a i n h y d r a u l i c
a. General. The single-unit-type engine dri-
pump (TM 10-3930-242-12).
ven pump is coupled directly to the engine bal-
ance shaft drive gear, where it is driven at en-
a s s e m b l e the main hydraulic pump in numerical
gine speed. It supplies oil under pressure to op-
sequence.
e r a t e the brakes, side shift cylinder, and oscil-
d . Cleaning and Inspection.
l a t o r cylinder.
(1) Clean all parts thoroughly, using sol-
b. Removal. Remove the engine driven pump
v e n t P-D-680, or equal.
(TM 10-3930-242-12).
( 2 ) Inspect the bearings for roughness and
c. Disassembly. Refer to figure 6-17 and dis-
l o o s e n e s s or wear.
a s s e m b l e the engine driven pump.
( 3 ) Inspect the shaft for scratches, nicks,
d. Cleaning and Inspection.
a n d worn areas.
(1) Clean all parts thoroughly, using sol-
( 4 ) Inspect the rotors for scored areas and
v e n t P-D-680, or equal.
f o r wear and other damage.
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